inferential control an advanced control strategy to save

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Dr. Surinder Jassar, P.Eng. School of Applied Technology Humber Institute of Technology and Advanced Learning 1 Inferential Control An Advanced Control Strategy to Save Energy in Residential Heating Systems by Dr. Surinder Jassar, P.Eng. Dr. Zaiyi Liao, P.Eng. Dr. Tarsem Sharma, P.Eng.

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Page 1: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

1

Inferential Control – An Advanced

Control Strategy to Save Energy in

Residential Heating Systems

by

Dr. Surinder Jassar, P.Eng.

Dr. Zaiyi Liao, P.Eng. Dr. Tarsem Sharma, P.Eng.

Page 2: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Outline

Objectives

Residential Heating Systems – Current control practices

Inferential Control Scheme

Testing Results

Conclusion

2

Page 3: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Objectives of the Study

To investigate the current control practices for space heating

systems in Canada.

To design and develop an advanced control strategy for

improving the performance of the buildings including thermal

comfort and energy efficiency.

To test the performance of the inferential control scheme for a

forced warm-air heating system in a simulation environment.

3

Page 4: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Building Automation

Issues

4

Target for improvement

Page 5: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Factors affecting energy efficiency and thermal

comfort

Thermal performance of the building envelope

The energy efficiency of the furnaces

Self-programmable thermostats with temperature set-

back capabilities

Performance of control systems

5

Page 6: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Control of Heating

Systems

6

Residential Heating Systems – Current control

practices

Page 7: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Current control practices: Survey conducted in

Ontario

Survey Conducted in

Winter 2008/2009

20% dissatisfied

with room

temperature in

winter

36% feel overheating

27% feel overcooling

1. Large energy consumption

2. Lower thermal comfort

7

Page 8: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Proposed Control Method: Inferential Control

Scheme

8

Page 9: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Different Control Schemes and Test Conditions

Type 1: Single Zone

Type 2: Zoned Control Scheme

Type 3: Inferential Control Scheme

Test conditions:

1. Climatic data for Toronto

2. January 1st to March 31st and October 1st to December

31st

3. Daily climatic conditions are described by the HDH

9

Page 10: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Test Conditions

4. HDH for Toronto for the Year of 2008

5. Desired Temperature Schedule for Single-Zone

10

Page 11: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Test Conditions

6. Desired Temperature Schedule for Multi-Zone

11

Page 12: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Testing Results: Temperature

12

6860 6865 6870 6875 6880 6885 689019

20

21

22

23

24

25

26

Time ( Hour of the Year )

Avera

ge A

ir T

em

pera

ture

( D

eg C

)

Low Heating Load: Oct. 13 (HDH=21.4 0C.Hr)

Desired Temperature

Single Zone Control

Zoned Control

Inferential Control

Page 13: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Testing Results: Heating Energy Consumption

(MJ)

Single Zone Control Method: 12%

Zoned Control Method: 14.5%

13

Month Single Zone Control Zoned Control Inferential Control

January 19983 20186 17923

February 17212 17921 15402

March 16692 17012 14320

October 10127 11121 9010

November 13721 14000 12215

December 16724 16985 14220

Total 94459 97225 83090

Page 14: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

14

Testing Results: Thermal Comfort

Page 15: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning

Inferential control scheme compared

The temperature extremes, either higher or lower than

the set-point, are lesser as compared to the conventional

single-zone control method.

The energy consumption is low.

Zoned control method when compared to proposed

control strategy, temperature variations are less and

energy consumption is high.

15

Page 16: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning 16

Page 17: Inferential Control An Advanced Control Strategy to Save

Dr. Surinder Jassar, P.Eng.

School of Applied Technology

Humber Institute of Technology and Advanced Learning 17