proposal for whole house energy measures 11thmarch 2013...cane end lane | bierton | aylesbury | hp22...




Established Feb 2007 Founded by Harry Shepherd Cross Background in House building & Construction James Hoare Chartered Engineer with 27 years Background in Electrical Power Systems Engineering Major Investment in 2011 by Private EIS Investors & Bridges Ventures, A London based Ethical Investor

Introduction




Heat Pumps




Trenching with sand blinding

Typical Trenches

1m wide x 1m deep, min 3m spacing for digger access and spoil




The V-Plough




Ground works in the Winter 3600 m trenches for 80kW GSHP

March 2010 November 2009




4000m GSHP Collector




3 months later




Undersized Ground Collector Permafrost




Closed Loop Borehole Drilling




Borehole Drilling

4 x 150m




Open Loop Borehole Drilling

100m deep just off Regent St,

Central London




Open loop Extraction from Moat 1x40kW GSHP 600l DHW + Heating




GSHP ground collector manifolds




Manifold Pit Rescue Before After

Ardenham Energy’s Proposal

Matthias Court




As the building is unoccupied a whole house approach to heating and energy efficient measures as per the brief.: External wall insulation (EWI) Ground Source Heat Pump (GSHP) Lighting LED for communal areas.

Measures




External Wall Insulation

It has been identified that the building would benefit from External wall insulation as the existing cavity will have inherent problems such as condensation, mould and damp. By utilising an established product such as that has been specifically designed for hard to treat properties we can achieve the desired U values. Substrate: Brickwork and Dense Concrete Fungicidal Wash: Required Bonding agent: Not required Insulation: Structherm Ltd: Phenolic Thickness: 60mm Board Size: 1200x600mm Density: 40kg/m3 Thermal Conductivity: 0.020W/mk U-Value for Scheme (based on the construction indicated in the calculations) 0.28 W/m2k Fire Breaks: Integral with insulation, tested under BS 8414 to BR135





U Values

Building Regulations for state that properties have to have a U value of 0.30Wm2k

Currently Mathias and Adelphi have a U value of: U-value = 1.93W/m²K

By installing External Wall insulation this would be: U-value = 0.28W/m²K




Condensation Point

condensation point

Cavity

Current Condensation Point




Condensation Point Condensation with EWI By installing EWI the condensation will be drawn to the outside of the building fabric.

Cavity

Condensation point




EWI examples




This is recommended as it reduces the risk of damage .




Renewable Heat Incentive.

What is the Renewable Heat Incentive? On 10 March 2011, the Government announced the details of the Renewable Heat Incentive policy to revolutionise the way heat is generated and used. This is the first financial support scheme for renewable heat of its kind in the world. At a time when we can see many problems with relying on a rapidly changing world and continuous reliance on oil and gas, we are proposing to put in place a key foundation stone of our energy future where both carbon reduction and energy security are assured. The Renewable Heat Incentive(RHI) policy document, sets out the detailed arrangements for this scheme, which will provide long-term financial support to renewable heat installations to encourage the uptake of renewable heat




Ground Source Heat Pumps

The sun radiates energy on the earth’s surface. Dig one metre down, and the ground is a thermal store from which we can extract free energy. When we install a ground source heat pump, we lay loops of pipes in the ground, or we place them in a bore hole up to 200m deep. The pipes contain a liquid which absorbs the ground heat, however it is very important not to over extract this natural resource and we at Ardenham Energy give careful consideration to the design of any ground collector to be sustainable for at least 25 years. The ground collector provides the heat source for a heat pump located inside the property.





Ground source heat pumps are silent with negligible maintenance needs and costs, and no visible external units. Ground source heat pumps can be installed in existing properties, and are particularly recommended for new builds and larger homes or business/community use premises. Because of the constant level of heat, ground source heat pumps are even more efficient than air source heat pumps, though they cost more to install. Once installed and operating, you can expect a cut in fuel bills of between 50% and 70%.





Ground source heat pumps take heat from the ground, bedrock or water, converting it into energy which can be used for central heating and/or domestic hot water production. Radiation from the sun heats the earth. The earth then stores the heat, just a metre or so down, at a temperature of around 8-12°c – even throughout the Winter. A ground source heat pump system comprises of three basic elements; a ground loop, the heat pump itself and a heat distribution system. The ground loop is a pipe buried underground in either a horizontal trench or a vertical borehole.





• The benefits • Proven technology • Fits your current heating system • Saves up to 75% on existing bills • 25 year lifespan, low maintenance • 400% efficient • Reduces local carbon emissions to zero • Ground source heat pumps enhance property values • Generous grants available • No fire or safety risks




Ground Source Heat Pump

For this we propose a District heating system utilising Ground Source Heat Pump Technology. By circulating the heat transfer fluid from the bore hole array around the building each resident can be connected quite easily. This will heat the property and provide direct hot water. Unlike other district heating schemes each resident will have total control on the heating of their home. This also eliminates the problem of breaking EU regulations regarding allowing residents to choose their own energy suppliers as they can choose which energy company they prefer to supply electricity to the heating unit.




The bore holes would be connected and would utilise the car park area. This can be re-laid after installation




The heat ring would be in the risers and can be connected via the airing cupboard where existing hot water cylinder is currently. This heat ring would be then connected to the ground source array.




Proposed location of heat pump




The Heat pump that we have identified as the most efficient has a co-efficiency performance Of upto 5,04. Built-in water heating and control technology. Silent operation and up to 80% savings potential. This is designed to be installed in most airing cupboards or kitchens.




This heat pump is designed to be installed in the same space required for most domestic white goods.




Heat Pump Investment Appraisal

Customer

Assumptions

Size of system (kW) 400

Cost £1,502,733

Annual Generation (kWh) 1,118,591

Current Electricity Price (£/kWh) £0.14

RHI Rate (£/kWh) £0.034

Coefficient of Performance 3.8


Retail Price Inflation (RPI) 2.5%

Electricity Price Inflation 7.0%


Ungeared IRR 13.9%

Cost of borrowing 5.0%

Gearing 70.0%

Period of Loan (Years) 10

Geared IRR 19.4% -£2,000,000

-£1,000,000

£0

£1,000,000

£2,000,000

£3,000,000

£4,000,000

£5,000,000

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Cas

h F

low

(£

)

Years

Cash Flow

Balance - Ungeared

Balance - Geared

Total Revenue

Financial Savings and Returns





In year one an average saving of £1,000 will be made for each of the 115 flats. The savings will increase year on year as energy prices increase.

Heat is now 3.6p/kWh rather than 14p/kWh, a 75% saving to the tenant.

Year 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Totals

Capital Outlay ########

Annual Revenue

Revenue from RHI £38,032 £38,983 £39,957 £40,956 £41,980 £43,030 £44,106 £45,208 £46,338 £47,497 £48,684 £49,901 £51,149 £52,428 £53,738 £55,082 £56,459 £57,870 £59,317 £60,800 £971,517

Energy savings for Res idents £117,452 £125,674 £134,471 £143,884 £153,956 £164,733 £176,264 £188,602 £201,804 £215,931 £231,046 £247,219 £264,525 £283,041 £302,854 £324,054 £346,738 £371,009 £396,980 £424,769 £4,815,005

Total Revenue £0 £155,484 £164,657 £174,428 £184,840 £195,936 £207,762 £220,369 £233,811 £248,143 £263,428 £279,730 £297,121 £315,673 £335,469 £356,592 £379,136 £403,197 £428,880 £456,297 £485,569 £5,786,522





Assumptions

Size of system (kW) 400

Cost £1,824,358

Annual Generation (kWh) 1,118,591

Current Electricity Price (£/kWhth) £0.140

Current RHI Rate (£/kWh) £0.077

Coefficient of Performance 3.80


Retail Price Inflation (RPI) 2.5%



Ungeared IRR 14.2%

Cost of borrowing 5.0%

Gearing 70.0%

Period of Loan (Years) 10

Geared IRR 20.0% -£8,000,000

-£6,000,000

-£4,000,000

-£2,000,000

£0

£2,000,000

£4,000,000

£6,000,000

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Cas

h F

low

(£

)

Year No.

Cash Flow

Balance - Ungeared

Balance - Geared

Total AnnualRevenueAccrued CurrentFuel Cost





This figures are calculated using the proposed new RHI tariff at 7.7p per kwh

Heat is now 3.6p/kWh rather than 14p/kWh, a 75% saving to the tenant.

Year 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Capital Outlay £1,824,358

Annual Revenue

Revenue from RHI £86,132 £88,285 £90,492 £92,754 £95,073 £97,450 £99,886 £102,383 £104,943 £107,566 £110,256 £113,012 £115,837 £118,733 £121,702 £124,744 £127,863 £131,059 £134,336 £137,694

current system annual cost £156,603 £167,565 £179,294 £191,845 £205,274 £219,643 £235,018 £251,470 £269,073 £287,908 £308,061 £329,626 £352,699 £377,388 £403,806 £432,072 £462,317 £494,679 £529,307 £566,358

Accrued Current Fuel Cost -£156,603 -£324,168 -£503,462 -£695,307 -£900,581 -£1,120,225 -£1,355,243 -£1,606,713 -£1,875,786 -£2,163,694 -£2,471,755 -£2,801,380 -£3,154,080 -£3,531,468 -£3,935,274 -£4,367,346 -£4,829,663 -£5,324,342 -£5,853,648 -£6,420,006

New system annual fuel cost £41,211 £44,096 £47,183 £50,486 £54,020 £57,801 £61,847 £66,176 £70,809 £75,765 £81,069 £86,744 £92,816 £99,313 £106,265 £113,703 £121,662 £130,179 £139,291 £149,042

Savings for residents £115,391 £123,469 £132,112 £141,360 £151,255 £161,843 £173,172 £185,294 £198,264 £212,143 £226,993 £242,882 £259,884 £278,076 £297,541 £318,369 £340,655 £364,500 £390,015 £417,317

Total Annual Revenue £0 £201,523 £211,754 £222,604 £234,114 £246,328 £259,292 £273,058 £287,677 £303,207 £319,709 £337,248 £355,894 £375,721 £396,809 £419,242 £443,113 £468,517 £495,560 £524,351 £555,011




Fuel Savings

£11,953

£33,467

£12,433

£31,304

-£2,727 -£10,000.00

£0.00

£10,000.00

£20,000.00

£30,000.00

£40,000.00

£50,000.00

Electricity Oil LPG Mains Gas Heat Pump

Fue

l Co

st

Heating Source

Fuel Cost Savings (Year 1)

Saving with HP

Fuel Cost




CO2 savings

50,356

140,997

53,087

27,960 15,940

0

50000

100000

150000

200000

250000

Electricity Oil LPG Mains Gas Heat Pump

Fue

l Em

issi

on

s (k

gCO

2eq

)

Heating Source

CO2 Savings

CO2eq Saving

Emissions




Led Lighting

LED stands for light-emitting diode, and LED bulbs differ from traditional incandescent bulbs in the way they produce the light they emit. LEDs produce light through the use of semi-conductors and are some of the most efficient bulbs on the market producing around 90% less energy than incandescent bulbs.




LEDs use 90% less energy than incandescents (CFLs use 60%-80% less than incandescents, and halogens use 20-30% less). LEDs can last for 25-30 years, dependent on use. LEDs give out their light quickly at start-up, so you don't have to put up with a few moments of dim light when you flick the light switch. LED lights don't contain mercury (CFLs do, although it's only a small amount). Tests have found that LED lights, like halogens, work fine in low temperatures, whereas CFLs don't.

Led Lighting




Product Bulkhead Product Orion LED Orion LED Orion LED Orion LED Orion LED

Control gear type 38w 2D Control gear type 2750lm LED 2750lm LED 2750lm LED 2750lm LED 2750lm LED

Quantity 212 Quantity 212 212 212 212 212

Load per fitting (inc. losses) in Watts 45 Load per fitting (inc. losses) in Watts 22.8 22.8 22.8 22.8 22.8

Total Load KW 9.54 Total Load KW 4.83 4.83 4.83 4.83 4.83

Maximum hours per day 24 Maximum hours per day 24 24 24 24 24

Days per week 7 Days per week 7 7 7 7 7

Days per year 364 Days per year 364 364 364 364 364

Maximum hours run per annum 8736 Maximum hours run per annum 8736 8736 8736 8736 8736

Level of occupancy* 100% Level of occupancy 100% 80% 60% 40% 20%

Actual hours run 8736 Actual hours run 8736 6988.8 5241.6 3494.4 1747.2

Annual consumption KWh 83341.44 Annual consumption KWh utilising Presence Detection 42226.33 33781.06 25335.8 16890.53 8445.27

% of Artificial Light 100% % of Artificial Light 100% 100% 100% 100% 100%

Annual consumption KWh utilising Presence & Daylight Control 83341.44 Annual consumption KWh utilising Presence & Daylight Control 42226.33 33781.06 25335.8 16890.53 8445.27

Unit rate (£) 0.09 Unit rate (£) 0.09 0.09 0.09 0.09 0.09

Annual Electricity Cost £7,500.73 Annual Electricity Cost £3,800.37 £3,040.30 £2,280.22 £1,520.15 £760.07

Annual Saving (£) £3,700.36 £4,460.43 £5,220.51 £5,980.58 £6,740.66

Annual Tonnes of Co2 Produced 35.84 Annual Tonnes of Co2 Produced 18.16 14.53 10.89 7.26 3.63

Annual Saving Tonnes of Co2 Produced 17.68 21.31 24.94 28.57 32.21

Proposed Product Cost £0.00 % of Occupancy 100% 80% 60% 40.0% 20%

% of Artificial Light 100% 100% 100% 100% 100%

Led Lighting

These figures exclude emergency lighting

*If the present lighting solution is not fitted with intelligent control occupancy is assumed at 100%

**Based upon info provided by Carbon Footprint Ltd, the average broad leafed tree in the UK absorbs an average of 730kg of CO2 per year in its lifetime. All the LED lighting is manufactured in the UK.




Summary and Benefits External wall insulation: Full cladding of defective buildings (reduces need for difficult remedial work) Full over-cladding of defective or inefficient system built structures (improving structural safety and thermal continuity) Re-configuration of building facades to reduce or enlarge glazed areas (modifying solar gain, heat loss and glare) Enclosing balconies and walkways (converting external space into usable internal floor area) Forming new or extending existing parapets (improving safety at roof level) Could be subject to Eco Funding. Ground Source Heat Pump: Lower Electricity Bills for residents by up to 75% or more No Gas on site No annual gas safety inspection Renewable Heat Incentive payments which will contribute towards payment of the system. Lower Maintenance Costs Heat is now 3.6p/kWh rather than 14p/kWh, a 75% saving to the tenant. LED Lighting: Long-lasting - LED bulbs last up to 10 times as long as compact fluorescents, and far longer than typical incandescents. Durable - since LEDs do not have a filament, they are not damaged under circumstances when a regular incandescent bulb would be broken. Because they are solid, LED bulbs hold up well to jarring and bumping. Cool - these bulbs do not cause heat build-up; LEDs produce 3.4 btu's/hour, compared to 85 for incandescent bulbs. Common incandescent bulbs get hot and contribute to heat build-up in a room. Mercury-free - no mercury is used in the manufacturing of LEDs. More efficient - LED light bulbs use only 2-17 watts of electricity (1/3rd to 1/30th of Incandescent or CFL). LED bulbs save electricity, remain cool and save money on replacement costs since LED bulbs last so long.

Outcome: Warmer , Happier , Safer residents.




Project Costs

External wall insulation including scaffolding: £864,500 (Including Scaffolding) Ground Source Heating system: £1,824,358.00 LED Lighting: £16,950.00 (Supply only as electricians will be on site) Scaffolding costs can be removed if sourced by the client if double glazing is replaced. These costs are subject to further investigation and borescope /building survey.




Thank You for your time

John Parker

Northern Regional Manager T. 01924 635012

M. 07718 671037 [email protected] www.ardenhamenergy.co.uk King Edward Street, Normanton, Yorkshire, WF6 2AZ

proposal for whole house energy measures 11thmarch 2013...cane end lane | bierton | aylesbury | hp22...

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