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ENERCOV SYSTEMS

By

YF Yap

Enercov Co.

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t1. ENERCOV (SUZHOU) Co Ltd

Block B, B6-7, Suhong Ind Square,#81 Suhong West Road,Suzhou Industrial Park,JiangSu, China 215021

2. ENERCOV (THAILAND) Co Ltd52/1 Moo 13 Krungthep-Kreeta Road,Sapansung, Bangkok 10250Thailand

3. ENERCOV (SINGAPORE) Co Ltd80 Genting Lane #06-02, Genting Block,Ruby Industrial Complex,Singapore 349565

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We are

TEMPERATURE ,HUMIDITY & CONTROLS

SPECIALISTS

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Presentation Details

1. Company Policies2. Desiccant Application3. Enercov Application4. Enercov’s Control System5. Enercov’s Components6. Proposals to NTU7. Job References8. Conclusion9. Questions & Answers

Company Policy

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1. Assist our customers to reach the bestsolution for your needs.

2. Design your unit.3. Use Good Quality Components.4. Assemble and Start Up.5. Provide Good After Sales Service.6. Customer Satisfaction.

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Desiccant Wheel

HumidifiedExhaust Air Outside Air

HumidifiedRoom Air

DehumidifiedAir into

CleanRoom

--------------------------------------------------

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tDesiccant

Advantages1. It can be used for very low

Room Dew Point Temp < 4 deg C2. It can be used to achieve RH < 10%

Disadvantages1. High Power Consumption due to Heating

Element.2. Steps control and not analog.3. High Maintenance Cost. Need to change

filter and Desiccant.4. Loose Desiccant can contaminate the supply air .5. Need big floor space.

ANNUAL SAVINGS H

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ENERGY RECOVERY

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DX Coil

EvaporatorCoil

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ENERCOV SYSTEM Evaporator

CoilCondenser

Coil

Semi HermeticCompressor

Chilled WaterCoil

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Refrigeration Cycle Diagram

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Psychometric Explaination

Outdoor Condition

RoomCondition

Coolin

g

Heating

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DX Coils

Advantages1. Uses Energy Recovery. Very little energy wasted.2. VSD control. Analog Control.3. Most cost effective to control RH above 30%.4. Low Maintenance Cost. Wash the coil with water.5. No contamination to supply air due to no direct

contact media. 6. DX coils is build into the AHU. Need less space.

Disadvantages1. Limitations to control RH below 30% RH due to

minimum suction gas temp of 3 deg C.

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ITS SOUND SIMPLE

BUT ALL THIS THINGS

IS NOT COMPLETE WITHOUT

TOTAL CONTROL

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tConventional Air Conditioner

& Desiccant Control

1. Room RH Sensor Activate when RH above 55%.2. Signal send to DDC.3. Activate to ON the Desiccant Unit. 3 stages heater

in Desiccant Unit fully ON.4. RH of Room Drops to 50%. Then , 1 stage heater OFF.5. Once RH drops below 45% , 3 stages heater OFF.6. Once RH above 55% , 3 stages heater ON again.7. This system uses STEP CONTROL and NOT

ANALOG CONTROL.8. MOST IMPORTANTLY Control DEHUMI-

DIFICATION & COOLING SEPARATELY.

Bio

safe

ty L

ab

ora

tory

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tConventional Air Conditioner

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RESULTS WITH ENERCOV SYSTEMH

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RESULTS WITH ENERCOV SYSTEMH

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Before we can start to CONTROL

We must know

What are the

CONTROL MODE

HeatingHeatingCoolingCooling

DehumidificationDehumidification

HumidificationHumidification

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Process of the Air

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ENERCOV SYSTEM

CONTROL Dehumidification, Cooling,Heating & Humidification to keep

Temperature and Relative Humidityof the ROOM as

CONSTANT as POSSIBLE.

ENERCOV Humidity Total Control Concept

DX COILSHot Gas Reheat,Hot Gas Bypass,

VSD &DDC Controls System

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High Quality Components UsedH

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CARRIER AHU

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HUMIDITY CONTROL UNIT

CAREL CONTROLLER, PANEL & SENSORS

DDC PROGRAMMABLE4 x 20 LCD Display

Temperature &Humidity Sensor

Pco1 Controller

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CAREL STEAM HUMIDIFIER

We would like to Proposed to the

TOP MANAGEMENT ofNANYANG TECHNOLOGICAL

UNIVERSITY ( NTU )

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PROPOSE ENERCOV SYSTEM

AHUEnercov Unit

AND

CONTROLLER, PANEL & SENSORS

DDC PROGRAMMABLE4 x 20 LCD Display

Temperature &Humidity Sensor

Pco1 Controller

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tENERCOV’S CONTROL

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tSCHEMATIC DIAGRAM

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ENERCOV CONTROL ITEMS

1. Two sets of Sensors Temperature & HumidityOne at Supply Air and One in the Room.

2. Solenoid Valve to Control The Reheat Coil.3. Control Valve to Control Chilled Water Coil.4. Solenoid Valve to Control the HotGassBypass.5. Temp Sensor for Air Off Chilled Water Coil.6. Temp Sensor for Air Off DX Cooling Coil.7. Others

Control Points ScheduleH

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Psychometric ProcessH

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ENERCOV

DX Cooling Coil

( 20kW Only )

ENERCOVDX Heating Coil

MU

NT

ER

’S Dehum

id

( 98 kW)

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DX Cooling Coil

Total Cooling 31.58 kWSensible Heat Rat 0.51Sensible Heat 16.1 kWLatent Heat 15.5 kW

Chilled Water Coil

48.4 kW0.94

45.5kW2.9kW

ENERCOV FLEXIBILITY

Range for Sensible Heat 9.1 kW to 61.6 kWRange for Latent Heat 0.58 kW to 18.4 kW

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ENERCOV SYSTEM

CONTROL Dehumidification, Cooling,& Heating to keep

Temperature and Relative Humidityof the ROOM as

CONSTANT as POSSIBLE.

RESULTS WITH ENERCOV SYSTEMH

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TOTAL CONTROL

TEMPERATURE 22 +/-1 deg Celcius

and

RELATIVE HUMIDITY 40%-50% RH

JOB REFERENCES

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JOB REFERENCESH

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Health Thailand.3. NSM Factory Co Ltd.4. UL & CE Standard Testing Room Bangkok.5. Ministry of Medicine Thailand Vaccine

Production Class 10000.

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1. Takeda Lace Co Ltd

• Temperature 24 deg C +/- 1 deg C• Relative Humidity 65% +/- 2% RH• DDC micro processor based control system• Steam Humidifier capacity control• Cooling / Heating / Dehumidification /

Hum are controlled in proportional linearity.

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Takeda Lace Co Ltd

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2. Biological Lab Safety 3 Ministry of Health Thailand

• Temperature 23 deg C +/- 1 deg C• Relative Humidity 50% +/- 5% RH• Room Pressure Clean Room - 20 Pa• Room Pressure Clean Room + 20 Pa• 100% Outdoor Air Intake• DDC micro processor based control system• Hot gas bypass system

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Biological Lab Safety 3 Ministry of Health Thailand

Biological Lab Safety 3 Ministry of Health Thailand

CONTROL POINT DIAGRAMFOR BSL-3 LABORATORY FACILITY

DATE : 15-SEP-2003

?2 ?C

?10 %rh

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3. NSM Factory Co Ltd

• Temperature 27 deg C +/- 1 deg C• Relative Humidity < 40% RH• Double series evaporator coils system• Hot gas by pass system• DDC micro processor based control system

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4. UL & CE Standard Testing Room ( Air Conditioner Performance Testing Room 12000 - 72000 Btu/Hr )

• Room Temperature Error +/- 1 deg C• Room Humidity Error +/- 5% RH• Steam Humidifier capacity control• Cooling / Heating / Dehumidification / Hum are controlled in proportional linearity.

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UL & CE Standard Testing Room

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UL & CE Standard Testing Room

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5. Vaccine Production Clean Room Class 10000

• Room Temperature < 22 deg C• Room Humidity 50% +/- 10% RH• Room Pressure 10 – 20 Pa• GMP Clean Room Class 10000• Air Change per Hour 30• Cooling / Heating / Dehumidification / Hum are controlled in proportional linearity.

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Vaccine Production Clean Room Class 10000

CONCLUSION

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TOTAL CONTROL ON THE TEMPERATURE & RELATIVE HUMIDITY

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tSUMMARY OF ENERCOV SYSTEM

1. CONTROL TEMPERATURE & RH by CONTROLLING COOLING, HEATING,DEHUMIDIFICATION SILMULTANEOSLY.

2. USES MICROPROCESSOR CONTROL.3. HAVE MORE THAN 20 POINTS SENSOR &

CAN BE ADJUSTED TO MEET DESIRED TEMPEARATURE & RH OF THE ROOM.

4. USER FRIENDLY.5. ASSURANCE THAT TEMPERATURE

22 C +/- 1 deg C.6. ASSURANCE RELATIVE HUMIDITY

40% - 50% RH.

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tENERCOV is providing a

BRAIN for the Air Conditioning System to

CONTROL the Temperature 22 -/+ 1 deg C and

Relative Humidity 40 - 50% RH& Save at least 70% Energy Compare

To Desiccant Unit

ITS our JOB to PROTECT

THE EARTH for the

FUTURE of OUR CHILDREN

SAVE ENERGY

Thank you