eas report icici bangalore

8/19/2019 Eas Report Icici Bangalore

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CHAPTER – 3

ENERGY CONSERVATION OPPORTUNITIES (Observations, Field Trials, Analysis and Key Result Areas)


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3.1 INTRODUCTION

The study of the utility operations, data collection, observations, field trials and

analysis for various areas at ICICI Bank, Shobha Pear, Ban!a"r" wasundertaken keeping in view the energy scene, focus areas elaborated in theprevious chapters and with a view to identify energy conservationopportunities in the sae! The basis for this is the orientation visit,discussions with the engineering personnel and the agreed plan for datacollection " field trials! All these trials were undertaken at noral operatingconditions! Also the data was so generated that erratic or absurd values aredeleted and only data for noral operating conditions were taken for analysis!#aving potential is calculated on present electricity rates!

As highlighted in $hapter % &, electricity is the ain priary energy for

contributing to the total energy bill! 'ence, the focus of the study was on thissector! The study was therefore, devoted to analysis of operations and aor euipent*s consuing electricity!

$oercial preises have the potential to consue substantial aount of

energy and other resources! +nefficient utilisation practices can lead to ecesswaste! The goal of an energy audit is to identify these wasteful practices andsuggest ways to iprove! The role of an energy auditor is to showparticipating offices the link between actions taken in the office and their effect on the environent!

3.# ENERGY CONSERVATION A$ARENESS

Awareness of the agnitude of energy wastage*s needs to instilled in the inds

of not only the top and iddle anageent level but it is of etreeiportance to instil the sae in the inds of the operating people who areactually consuing aor part of the total energy! #oe of the ethods toachieve these obectives are-

− $oin appropriate slogans and display the sae at iportant places and near

strategic euipents!

− $onduct regular weekly eetings and brief the operating staff about the loss or gain on account of the energy uses in that period!

− Open a schee for obtaining suggestions for conserving energy!

− .isplay regularly the usage of energy!

3.3 E%ECTRICA% ENERGY

3.3.1 Tran&'or(er) Ca*a+- / U-&a-on

The #hobha /earl building occupied by +$+$+ bank has one no! 00 K12 304 1,

0&45 K1A transforer!


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/eak deand noted transforer was around 66& K1A or 47 8! Average deand

registered is about 494 K1A (3:8)!

A transforer is a device, which is foreost in the electrical power distribution

syste and reains continuously energised in the circuit drawing reactivepower! The reactive power deand of the transforer can be divided into aconstant portion and a load dependent portion! The constant portion is the noload power and is around 0 to 7!48 of rated power!

At present ;2s +$+$+ has a contract deand of 0&45 k1A! The average aiu

deand registered for the year &55: is 494 k1A! The variation in transforer

loading is as below! The +$+$+ office is a coercial building and power consued varies with occupancy levels! The transforer loading observedfor past onths and even for the last & years is uite low! /rovided no aor epansion is foreseen there eists soe saving potential in transforer rationalisation! #aving potential by replacing eisting 0&45 K1A transforer by a 05 lakhs giving a high payback period of 7!4 years! Thesae is being discussed so as to highlight the encon area and notnecessarily proposed! ?ased on anageents future plans for epansion or relocation the sae can be useful for si@ing future installations!

Table 3, ;onthly Transforer oading

Sr. No. on-h& a2("( De(anRe!&-ere, kVA

Tran&'or(er%oan!, 4

0! Ban 5: 453 35

&! Feb 5: 4&4 3&

7! ;arch 5: 46: 34

3! April 5: 6&6 45

4! ;ay 5: 66& 47

6! Bune 5: 6&4 45

A5era!e 606 78


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3.3.# a2("( De(an Con-ro

• oad anageent basically ais at iproving the syste load factor and or

optiising aiu deand! The average actual load factor for +$+$+?angalore is 748! oad factor is a easure of utilisation of available contractdeand or actual recorded ;.! The load factor is epectedly low since theoffice hours are around 0& > 06 hours in a day only with few fied loadsrunning throughout the day!

Thus,

oad factor C

..)(..3024 F P xdemand contract or recorded D M xdays xhrs

month per kwh

−−

• The peak deand is easured by taking half hour averages! +n a onth (:&5

hrs), there would be 0335 easureents! The highest easureent will bechosen as the peak deand! The total energy consuption deterines theaverage load!

• The aiu deand depends on the siultaneous running of various

achines of the plant at peak period!

• The present aiu deand varies fro 455 to 665 K1A " an average of

last 6 onths at 494 K1A!

• The iniu billing deand is


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• The peak deand will be onitored by installing a deand control eter (direct deand anageent syste)! These eters are prograed toswitch%off non essential loads, when a predeterined deand is likely to beeceeded! #iple systes give audible2visual alars, sophisticated systesprovide a wide variety of control options! +n general, the systes can providethe following facilities-

a! Accurate prediction of the deandb! Draphical display of present load and available argin to peak loadc! 1isual and audible alarsd! Autoatic shedding of loads in a pre%deterined seuencee! Autoatic restoration of loads (at etra cost)

f! Recording and etering facility (at etra cost)

• The peak deand occurs during peak occupancy when all terinals are

occupied and with higher abient teperature leading to operation of all A$plants!

• Approiate cost of installing a deand control eter is Rs! 5!:4 lakh!

Although, for bangalore office it is not necessary to install this eter for achieving above savings, the sae is proposed as a safety easure to noteceed contract deand!

3.3.3 Ar +on-onn! S&-e(

3.3.3.1 Re'r!era-on +o(*re&&or *an-&

a) Compressor units

The eisting air conditioning plant consists of


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The chilled water teperature aintained at supply end is 9$ with return fro

various A'G*s at 00 > 0&$! The share of ain A$ plant to overall electricityconsuption is about 7:8 (0 09$ with return air

teperature at &7 > &3$! Teperature of roo is aintained at && > &7 $for huan cofort!

c) Installing VFD for AHU blowers

The A'G blowers are continuously operating and blowing in air at fied cf!

?ased on a otor load survey conducted on each A'G blower otor it canbe noted that alost all otors are loaded to an etent of 45 > 65 8! Theotor si@e is norally selected based on initial starting torue! The air conditioning load varies with season and occupancy levels! $hiller loadanageent is based on fied return air teperature with respective A'G*sbeing switched off (anually) whenever lower roo teperature are reached!The potential savings with installing 1F. for A'G blowers is not uch asthese would be beneficial only during lower abient tep! or for lower

occupancy levels both of which are less freuent!

) !eplacing unersi"e motors

The otor loading of all continuously operated euipents has been studied and

no otor si@e rationalisation is proposed as the loading values easured arefound satisfactory!

e) Improvement potential at c#ille water $C#% %) pumps

The chilled water package syste consists of three units out of which only

two units of


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i! The two pups are consuing about 7!4 kw ore than rated!/rovided that flow can be reduced without affecting overall chilling load thesaving potential is about Rs! 9&,5552% p!a!

3.3.3.# n(&n! Re'r!era-on an Ar:+on-onn! Re;"re(en-&

A significant portion of the air conditioning load is due to the heat transitted

through the glass walls and heat stored in the walls! This results in the rooinner wall surface being at teperatures higher than that of the huan body!

This results in discofort as the huan body is unable to radiate heat to thewallsJ hence heat transfer (body cooling) is possible only by convection (air oveent) " perspiration! $ooling of the building structure (walls " roofs)itself can lead to draatic reduction in wall teperature!

A ;ubai based copany, speciali@ing in innovations in refrigeration and air

conditioning, has etended this concept further and attepted cooling theroof and the floor by burying a grid of water filled pipes (fig! 7!0), under vacuu, in the roof and floor! ater evaporates at &4L$ and the grid isconnected to a sall cooling tower, which acts as the heat sink andcondenses the water vapour!

This concept was first attepted in a pent house at Ahedabad! +n ;ay, with Ahedabad abient teperature at 30!6$, the terrace floor teperaturewas 60!


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;adya /radesh for ware house and an entire factory cooling! This can helpeliinate or reduce the need for air conditioning!

+t is possible to install a natural cooling syste consisting of a tube bundle sealed

under vaccu with a working fluid inside to dissipate solar heat gain receivedon top of building back to the atosphere and iniise heat load!

The working fluid filled under vacuu will evaporate at a very low abient

teperature and prevent solar heat fro passing through to the building wall!The evaporated fluid will need to be condensed in a sall water bath with acooling fan and return the fluid back to the pipe! The syste has noeuipent and oving parts apart fro a sall cooling fan! The working fluid

evaporates and rises to the top of the cooling bath and returns back bygravity! The pipe grid acts as barrier reef to the solar heat load and iniiseheat gain by the building structure! This syste can very effectively eliinateor significantly reduce energy consuption reuireents of air conditioningplants!

The detailed description of the syste is available in the for of a presentation!

arger picture is attached in appendi!

'owever, since the building is on lease any encon easure reuiring additions "

odifications in building will need to be put up with appropriate authorities!/otential for reducing air conditioning load is around 748!

3.3.3.3 I(*ro5e Ar D&-rb"-on An Cr+"a-on In Ar Con-one Roo(&

+n soe air conditioning systes, lower teperatures are set to distribute air

over a larger area and or satisfy individual lower cooling cofort levels! At

NATURAL COOLING SYSTEM USING HERITAGE TECHN IQUES & MODERN TECHNOLOGY

FOR 40% TO 70% REDUCTION IN AIR CONDITIONING LOAD

SOLAR HEAT

HEAT EXCHANGER

RADIANT HEAT EMISSION ABOUT PLUS 45°C.

WATER PROOFING

ROOF SLAB

LESS THAN 0°CTEMPERATURE

DAY & NIGHT

TO MINUS 40°C S!Y

CONTAINING BARITES

FINISH COAT

ROOM BELOW

PUMPLESS MO"EMENT

BY THERMAL FORCES ONLY

SURFACE TEMP.

PLASTER #NO INSULATION REQUIRED.$

NOTE ' GRID ABSORBS SOLAR HEAT DURING DAY

' HUMAN S!IN TEMPERATURE IS ABOUT 5°C.

& EXTRACTS STRUCTURE HEAT AT NIGHT.

TOWER WATERPUMPED COOLING

COOLING TOWERSEALED HEAT

IN WATER PROOFINGPIPE GRID EMBEDDED

TRANSFER FLUID

SMALL PUMP.

WASTE WATER RECYCLED BATHROOM

MA!EUP FROM

BY WATER E"APORATION

HEAT RE(ECTION TO ATMOSPHERE

AIR AIR

SMALL FAN


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Table 4, /roperties of .ifferent Types of indow Dlass

Pro"+- Soar Hea- GanCoe''+en-

Ther(aCon"+-5-

Da!h-Tran&(--an+e

$lear Dlass 5!:& 7!06 :<

?ody Tinted Dlass 5!34 7!&3 64

'ard $oated #olar$ontrol Dlass

5!&6 7!&: &3

#oft $oated #olar$ontrol Dlass

5!09 7!59 04

ow Eissivity Dlass 5!46 &!77 60

#olar $ontrol Q owEissivity Dlass

5!&7 0!:: 3!0

3.3.3.8 U&e %o< Con"+-5- $no< =ra(e&

$onsider the use of plastic window fraes in place of steel and aluiniu

fraes! This will reduce the heat ingress by conduction!

3.3.3.0 Pro5e In&"a-on on S"n:=a+n! Roo'& an $a&

?uilding insulation has not received uch attention in +ndia! Air%conditioned

office buildings should be provided with insulated walls (hollow bricks withinsulation, double walls with insulation filling, etc!) to reduce the heat ingress!/roviding roof under%deck insulation is a coon practice!

It is reported that at the Biological Sciences Building at Indian Institute of

Technology, Kanpur, roof and wall insulation has reduced the cooling load by 23%. The windows to wall ratio is only 7% and double glass insulated glasswindows hae reduced the cooling load by another !%.

" seen storied #odern, air conditioned office building in $u#bai with about

7, ft 2 has a heat load of &'( T) in su##er. The window to wall ratio is

about 3%. " si#ulation reealed that bloc*ing (% of the windows withla#inated rigid insulation boards can reduce the air conditioning load by &3%. +roiding gypsu# board panels along the walls with a one inch air gapcan reduce the air conditioning load by an additional %.

3.3.3.> A5o -he U&e o' Ar Cooe Conen&er&

To take advantage of the wet bulb teperature, avoid the use

of air%cooled condensers for large cooling loads! Air cooled condensers aybe peritted only for sall cooling loads or in conditions of etree scarcity


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of water or lack of space for cooling tower! Gse the lowest teperaturecondenser water available that the chiller can handle!

In the sa#e $u#bai building the air conditioning syste#

co#prised of (- nos. air cooled pac*age air conditioners with an aerage/+ of 2.7. )eplace#ent of air cooled condensers by water cooler condensers could reduce the specific energy consu#ption by about %.

Air cooled condensers, being liited by the dry bulb

teperature of air, generally result in higher refrigerant condensingteperature (0&4 F) and pressure, copared to water cooled condensers(


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/ower input to copr in K

Therefore , $O/ C air flow kg2hr (Tin > Tout) 5!&3965 copr! power

C 7,55,555965 055 kw

C 7!3<

Therefore, specific /ower$onsuption for present syste C 055 2 94

C 0!0: k2TR

#pecific power consuption withater cooled type condenser C 5!9 k2TR

Thus, for a 05) 0& 755 & noschillers :48 Rs 6!42kwh( diversity factor for onsoon onths)

C Rs! 6!7 lakhs p!a!

Even after accounting for cooling water puping and

additional blower fan power consuption, this saving potential is significant! Approiate cost of installing an evaporative cooler in front of two air cooledcondenser units would be about Rs! :!4 lakhs! Approiate savingspotential is about R&. 9.3 akh& giving a siple payback period of 04onths! ?ased on the success of one installation the other package unit canalso be installed with siilar evaporative type cooler!

E5a*ora-5e Pre:+ooer& 'or Ar:+ooe Conen&er&


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The perforance of air%cooled condensers is liited by thedry bulb teperature! The perforance of these condensers can beiproved, in dry weather conditions, by providing huidified air near wetbulb teperature! This pre%cooler consists of a fill aterial with tricklingwater through which the air is drawn! .epending on the design, the fanpower ay increase or a booster fan ay be reuired to overcoe theadditional resistance to air flow! The potential for energy saving in drysuer onths is about 758 to 358!

3.3.3.1? Re"+n! Ven-a-on Hea- %oa

1entilation is reuired for ensuring healthy conditions to the occupants

of air conditioned roos! ;ost designs provide ventilation of about 04 cf per person in nonsoking area! +n +ndia, the issue of +ndoor Air Muality (+AM) isusually ignoredJ ventilation ports are generally kept closed and fresh air isusually available only through door openings!

+ndoor Air Muality is a serious issue in the developed countries and, in

future, buildings in +ndia ay also have to adhere to nors! 'owever, withventilation, the heat load increases as the heat content of fresh air isgenerally higher in suer! Air to air heat echangers can help reduce thisheat load by pre%cooling the incoing air with out%going ehaust air!

At +$+$+ #hobha pearl there are no arked entry and eits for fresh

air and stale air! The building shaft ducts and door entry2eits are supposedto serve the purpose of supplying fresh air and ehausting stale air! The A'Groos have their fresh air ducts closed so as to iniise A$ load! +t isrecoended to atleast partially open the duct dapers!

Air%to%Air 'eat Echangers for /re%cooling 1entilation Air!

Pa-e Hea- E2+han!er&! These heat echangers use a series of thin

Aluiniu sheets to transfer heat between two air streas! #ufficientturbulence is created between the plates to iprove heat transfer!


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3.3.3.11 "- – -e(*era-"re +oon! &&-e(


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3.3.3.1# n(&n! non +r-+a oa on DG &e- "rn! oa &hen! ho"r&

ith increased grid power shortage and worsening power scenario in?angalore, the freuency of load shedding is bound to continue! /resently,the .D set contributes alost 04 8 of the power deand of the cople butconstitutes about &98 in ters of diesel epenses towards electricitygeneration in the overall energy cost! ith ever increasing price of diesel, itwould be in the anageents interests to iniise .D set running costs!This can be done by educating engineering operating staff on the critical andnon critical loads at the hotel cople! ?y identifying non critical loads andnot operating the during .D set running should be tried! Any other electricalload that can be switched off without affecting office work should be identified

during .D set operation! +t should be infored to all concerned that .D setelectrical costs are in ecess of R&. #? *er k


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3.9 $a-er U&e =or Toe-& / Garenn!

The data collected for water consuption in +$+$+ building indicates

an average water consuption of 0555 I2onth! This is a huge uantity of water consuption for a coercial building cople and is coparable withother +$+$+ building like ;ahalai at ;ubai! ;oreover, fro the datacollected for water use in the building, it is observed that ost of the water used is in toilets with very inor consuption for gardening! For anapproiate occupancy level of 0455 persons in the building per day, thespecific consuption is about &4 lt2person! The sae is only indicative asactual occupancy is difficult to estiate!

ow volue flushes can be installed with occupancy sensors to

iniise water usage! Toilet flushes with water release rates of 6 lt2flushinstead of older ones with 09 lt2flush are now available!

3.8 Re*a+n! ho-


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Appendi > gives the scheatic diagra of an air conditioning plant wasteheat recovery potential for hot water generation!


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3.0 Che+k&- =or I(*ro5n! Ener! E''+en+

Da!no&-+&

The following check list provides a guide to help diagnose the reasons for poor $O/ in chiller packages!

For 1apour $opression ;achines

0! $opare the $O/ with that epected for siilar end%use teperatures!&! +n case the $O/ is lower than epected, copare the suction and

discharge pressures with that of norally epected values for theparticular refrigerant! ower suction pressures indicate poor heat transfer in the evaporator! 'igher discharge pressures indicate poor heat transfer in the condenser!

7! in case poor heat transfer is suspected, the heat transfer co%efficient aybe calculated!

3! The heat transfer ay be poor due to fouling of the heat echangers(scaling, oil fil due to poor oil separation, etc!), inadeuate fluid flow,inadeuate heat transfer area or poor cooling tower perforance or poor

pup or fan perforance or a cobination of these factors!4! The cooling tower perforance ay be poor due to fouling of the fill,daaged fill, inadeuate water flow, ecess water flow, poor water distribution, inadeuate air flow or under%si@ing of cooling tower!

6! +n the case of air%conditioning achines, choking of air filters of Air 'andling Gnits, can lead to lower suction pressures!

:! /oor suction conditions for fans can lead to significantly reduced air flow!9! Fouling of heat echangers ay be due to carry over of lubricating oil into

heat echangers or scaling of heat transfer surfaces due to poor water treatent or other product related fouling! The precise cause will have tobe identified by further study!

drop ay be in voluetric efficiency or therodynaic efficiency of thecopressor! This reuires additional inforation on actual positivedisplaceent in the copressor and theoretical calculations using ;ollier charts! 1oluetric efficiency ay drop due to wear " tear of pistons "cylinders linings or alfunctioning of suction " discharge valves! Thetherodynaic efficiency ay drop due to poor copressor cooling,especially intercoolers in ulti%stage achines!


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For 1apour Absorption ;achines

0! $opare the $O/ with that epected for siilar end%use teperatures!&! ower generator teperatures indicate operation at reduced capacity!7! +n the case of absorption achines, the $O/ will generally be close to

epected valves! 'owever, the ability of the achine to deliver ratedcapacity will be coproised if there are any syste deficiencies! Reducedcapacity ay lead to increase in nuber of operating achines and alsowasted auiliary energy consuption in pups, cooling towers, etc!

3! +nadeuate cooling in cooling towers leads to reduced capacity of absorptionchilling packages!

Che+k&- =or Ener! Con&er5a-on n HVAC

A5o Re'r!era-on / Ar:+on-onn! -o -he E2-en- Po&&be

• Gse of evaporative cooling for cofort cooling in dry areas

• Gse cooling tower water at higher flows for process cooling

O*era-e a- H!her Te(*era-"re

• +ncrease the chilled water teperature set point if possible!

• +prove Air .istribution and $irculation• +prove air .istribution in $old #torages

• ;easure and control teperature accurately

Re"+-on n Ar:+on-onn! Vo"(e an Sh'- Unne+e&&ar Hea- %oa&

• Keep Gnnecessary 'eat oads Out

• Gse False $eilings

• Gse #all /ower /anel $oolers

• Gse /re%Fabricated, ;odular $old #torage Gnits

n(&e Hea- In!re&&

• $heck and ;aintain Theral +nsulation

• +nsulate /ipe Fittings

• Gse andscaping to the Reduce #olar 'eat oad

• Reduce Ecessive indow Area

• Gse ow Eissivity (#un $ontrol) Firs

• For air%conditioned spaces, low eissivity (sun control) fils, revolving doors,

air%curtains, /1$ strip curtains, etc!

• Gse ow $onductivity indow Fraes


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• /rovide +nsulation on #un%Facing Roofs and alls• /rovide Evaporative Roof $ooling

• ?uilding #tructure $ooling

• Gse .oors, Air $urtains, /1$ #trip $urtains

• Gse 'igh #peed .oors for $old #torage

U&n! =a5o"rabe A(ben- Con-on&

• Gse $ooling Tower ater .irectly for $ooling in inter

• .esign Hew Air%conditioning #ystes with Facility for 0558 Fresh Air during

inter

•

Gse Dround #ource 'eat /ups

Co(*re&&or&

• Ensure correct charging of refrigerant and check seals regularly for leaks

• Avoid throttling of suction 2 discharge valves

U&e E5a*ora-or& an Conen&er&


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• Gse two%speed or variable speed drives for cooling tower fan control if the fansare few! #tage the cooling tower fans with on%off control if there are any!

• Turn off unnecessary cooling tower fans when loads are reduced!

• $over hot water basins (to iniise algae growth that contributes to fouling)

• ?alance flow to cooling tower hot water basins

• /eriodically clean plugged cooling tower distribution no@@les

• +nstall new no@@les to obtain a ore unifor water pattern

• Replace splash bars with self%etinguishing /1$ cellular fil fill!

• On old counter%flow cooling towers, replace old spray type no@@les with new

suare spray A?# practically non%clogging no@@les

• Replace slat type drift eliinators with low pressure drop, self etinguishing, /1$

cellular units! Follow anufacturer*s recoended clearances around coolingtowers and relocate or odify structures that interfere with the air intake or ehaust!

• Optiise cooling tower fan blade angle on a seasonal and 2 or load basis!

• $orrect ecessive and 2 or uneven fan blade tip clearance and poor fan balance

• Gse a velocity pressure recovery fan ring

• $onsider on%line water treatent

• Restrict flows through large loads to design values

• #hut off loads that are not in service

• Take blow down water fro return water header

• Optiise blowdown flow rate

• #end blowdown water to other uses or to the cheapest sewer to reduce effluenttreatent load

• +nstall interlocks to prevent fan operation when there is no water flow!

Ther(a S-ora!e

• $onsider Theral #torage (eg! ice banks) for energy cost saving, where electric

supply utilities are having Ti#e of 0se tariff with high peak tie rates and low off peak rates


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3.> $ATER

3.>.1 Po-en-a 'or $a-er @ Ener! Con&"(*-on

1. Ener! E''+en+ ea&"re&

• The paragraphs below highlight the various energy efficiency easures

that the engineering staff can undertake in their day to day operating practise! Although, at ties all these easures ay not be ipleentable at the guestfacilities, but surely, they can be ipleented at the coon service facilitieslike restaurant, wash roos, service canteen, gardens, etc!

#. In -he Ba-hroo(

a. Sho you caninterrupt the flow while you lather up or shapoo and then resue at the

sae flow rate and teperature!

• +n the bathroo, a flow rate of two litres per inute should significantly

reduce water consuption but also let you enoy your shower!

b. Toe-&

• +nstalling a water%saver flush kit in the toilets will save water! One can also

replace large%volue toilets with units that use only si litres per flush > youllreduce water usage by :5 percent or ore!

• For the eisting toilets, install a water%saving device inside the tank at the

back of the toilet! The ost coon water retention device available is thetoilet da! hen installed properly, it will save about five litres per flush!

• A plastic bag or bottle filled with water and suspended inside the toilet

tank is an ecellent water displaceent device thats easy to find and install!

• ;onitor the perforance of the devices periodically! +f you discover that it

becoes necessary to double flush the toilet, soething needs to beadusted or replaced! Reeber- double flushing defeats the purpose of water conservation efforts and is costing oney!


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• Replacing an 09%litre%per%flush toilet with an ultra%low%volue (G1) si%litre flush odel represents a 66 percent savings in water flushed and will cutindoor water use by about 75 percent! The G1 toilet not only uses lesswater, it produces less wastewater and reduces load n the sewage treatentplant!

3. In -he -+hen

• Rinsing dishes under the tap also wastes a lot of water! Rinse the dishes

in a large bowl of water, or partially fill one side of a double sink! 'eresanother approach- slowly pour a bowl of water over dishes after putting the

in the drainer!

• +f you wash your dishes by hand, you use ore water and energy than if

you use an autoatic dishwasher!

• Fi leaking faucets as soon as possible! A hot water faucet that leaks one

drip per second will waste one that reuires little ore

water than nature provides! Often called eriscaping, the principles of a low%aintenance landscape are as follows-

• a reduced aount of lawn

• proper plant selection that akes use of native grasses, shrubs and trees

• the use of rain barrels 2 roof drainage


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• ulching to reduce evaporative losses around shrubs and trees• a proper irrigation syste with planned aintenance

6. $a-er Hea-er&

Eaine all the water heaters at the various guest roos and residential

facilities > if its surface is hot or even war, soe of the energy used to heatthe water is being wasted!

#hopping for a new water heaterU ook for a high%efficiency unit! #oe new

odels heat water only when you need it rather than storing hot water in a

tank!

hen the anageent is planning to buy a new water heater for the guest

roos, heres a tip that could save the up to Rs! 4555 per year- ?igger isntnecessarily better!

hen installing a new hot water tank or designing new guest roos, ake

sure that you place the unit as close as possible to the use point! 'eat is lostin long pipe runs! For instance, reducing a hot%water pipe fro 05 to 7 etreswill save enough energy in one onth to heat water for 05 showers! #iilarly,thin pipes are ore energy efficient than thicker pipesJ larger aounts of hotwater are trapped in thicker pipes, and ore heat is lost!

To help reduce heat loss, always insulate hot water pipes, especially where

they run through unheated areas such as baseents and crawl spaces!+nsulate the first three etres on cold water pipes and the first two etres onhot water pipes running to and fro tanks! This can save about & percent onthe heating bill and can reduce pipe%sweating probles in the suer! .onot place any pipe%wrap insulation within 04 c of ehaust vents at the top of water heaters, and never insulate plastic pipes!

;any water%heating tank anufacturers pre%set the teperature of the tank

to 65$ (035F)! Vou can lower the therostat to as low as 44$ (075F) tosave energy! .o not set it any lower, as this would risk the growth of disease%carrying bacteria such as legionella!

Turn down your water%heater therostat to a iniu setting when you plan

to be away for etended periods of tie!

ater conservation is the ost cost%effective and environentally sound way

to reduce deand for water! Gsing less water also puts less pressure onsewage treatent facilities, and uses less energy for water heating!

Ten ways that will save the ost water -


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0! ater the lawn only when it needs it! #tep on the grass! +f it springs back,when you lift your foot, it doesnt need water! #o set your sprinklers for oredays in between watering! #aves 7555 % 4555 lts! per onth! ?etter yet,especially in ties of drought, water with a hose!

&! Fi leaky faucets and plubing oints! #aves :4 lts! per day for every leakstopped!

7! .ont run the hose while washing the cars! Gse a bucket of water and a uickhose rinse at the end! #aves 445 lts each tie!

3! +nstall water%saving shower heads or flow restrictors! #aves 005! .ont water the sidewalks, driveway or gutter! Adust your sprinklers so thatwater lands on the lawn or garden where it belongs %% and only there! #aves&555 lts per onth!

9 En!neern! De*ar-(en-

• An analysis of such establishents show that approiately 458 of

the energy consued in a property is in the euipent and achinery roos,air conditioning systes, water treatent pup areas and sewage plants!Engineering .epartent is responsible for running and aintenance of theseeuipents!

• They are also concerned with entire building and cople!


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• Keeping the above in view, it is iperative that the Engineering.epartent operates these euipents at peak efficiency! Engineering.epartent can help conserve energy in the following ways-

0! ?y acting as an advisor to various departents to help the achieve their respective Energy ;anageent goals!

&! ?y ensuring efficient and econoic operation of all euipents!7! They ust aintain history card of each achine so that in%efficient and

uneconoical achines can be identified and eliinated to save the wastefuluses of energy! This will also help in deciding the preventive aintenanceschedule of each achine!

8 HVAC S&-e(& – Pan- Roo(

0! Turn off '1A$ achinery in all unoccupied spaces!&! Eliinate or reduce duct air leakage!7! hile operating chillers ensure following -%

% As far as possible keep leaving chilled water teperature on the higher side!% Reduce entering condenser water teperature% ;aintain proper refrigerant charge!% Eliinate refrigerant and charge!% ;aintain proper flow rate of condenser water % Operate chillers in proper seuence!

% Operate condenser and cooler pups in proper seuence!

3! ower hot water teperature for heating when outside teperature rises!4! hen chiller is not operating, ake certain that chilled and condenser water

pups are shut down!6! Gse proper water treatent to prevent fouling or sealing of condensers,

cooling towers and piping!:! Repair all hot, chilled and condenser water lines, valves and pups! A

considerable uantity of water is lost through leaky pup glands which canbe saved easily!

9! Repair or replace daaged hot or chilled water line insulation!

05! $heck efficiency of chiller against anufacturer*s specifications by checkingwater teperature and pressure drop in and out of chillers and condensersand otor aperage on copressor!

00! $ondenser tubes should be kept clean!0&! #top all refrigerant leaks!07! $heck daily purge operation on chiller for signs of air leaks03! Reove algae growth fro cooling towers!04! $heck all belt drives! Replace worn out or frayed belts!06! $lean A'G coils and fans periodically, check chilled water saple to know

the internal condition of coil! .o periodic cleaning of coil!0:! A'G filter ust be cleaned periodically!09! $heck all therostat for correct functioning!


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0 Hea-n!

0! $heck and back wash water filtration plant for higher efficiency and reductionin water syste scaling!

&! $heck water analysis periodically!7! Repair at once all leaks, dripping faucets and shower heads!3! $heck toiler flush valves for any water leaks!4! ower hot water teperature to 0&55 F!

6! $heck and adust swiing pool ake up water (not to eceed 058)!:! #hut down pool filtration plant when pool is not in use!9! Reduce lawn and shrubbery watering to absolute iniu!

> B"n! an Gro"n&

0! #eal all eterior windows, doors cracks and openings to reduce outdoor airleaks!

&! Reduce gap under the doors of air conditioned spaces to iniu!7! $heck grounds for leaking pipes underground!

3! $heck and repair all door closers!4! ;ake certain all electric connections are tight!

6! Keep all Scontacts* clean!:! $heck ighting levels in all Engineering spaces to see if they can be reduced!9! Replace all incandescent fitures with fluorescent and energy efficient laps

like /%< or #%&4 etc!

05! .o not switch on lights unless necessary!00! Arrange schedules for turning or reducing lights in guest corridors, lobby

area, function spaces, restaurants, bars, shops, kitchens etc!0&! ;ake a house inspection of all departents to see that energy conservation

is being observed!

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