DESIGN OF AN EXPERIMENTAL FACILITY FOR HYBRID GROUND

3,37

MB

SOURCE HEAT PUMP SYSTEMS

171

stron

6391

ID

Oklahoma State University

2005

rok

TABLE OF CONTENTS

1. INTRODUCTION 1-1

1.1 OVERVIEW 1-1

2. BACKGROUND AND LITERATURE REVIEW . 2-3

2.1 HYBRID GROUND SOURCE HEAT PUMP SYSTEM DESIGN2-3

2.1.1 Design 2-3

2.1.2 Experimental Procedures. 2-5

2.2 HYBRID GROUND SOURCE HEAT PUMP SYSTEM SIMULATION2-9

3. DESIGN CRITERIA . 3-11

3.1 RANGE AND TYPES OF EXPERIMENTS3-11

3.2 SIMULATION VALIDATION CONSIDERATIONS3-12

3.2.1 Component Level Validation 3-12

3.2.2 System Level Validation. 3-12

4. EXPERIMENTAL FACILITY DESIGN AND CONSTRUCTION. 4-14

4.1 DESIGN PROCEDURE .4-15

4.2 LOAD SIDE DESIGN .4-17

4.2.1 Load Side Layout . 4-17

4.2.2 ASHRAE 1117-RP Test Cell 4-19

4.2.3 Plant Fan Coil 4-20

4.3 SYSTEM SOURCE DESIGN 4-21

4.3.1 Source Side Layout 4-21

4.3.2 Ground Loop Heat Exchanger. 4-25

4.3.3 Evaporative Cooling Tower. 4-26

4.3.4 Pond Loop Heat Exchanger. 4-28

4.4 PRIMARY EQUIPMENT SELECTION.4-29

4.4.1 Heat Pump . 4-31

4.4.2 Circulation Pumps . 4-31

4.4.3 Water Storage Tanks 4-33

5. INSTRUMENTATION AND CONTROLS 5-35

5.1 INSTRUMENTATION .5-35

5.1.1 Data Acquisition Unit 5-39

5.1.2 Thermocouples. 5-42

5.1.3 HOBO Data Logger. 5-43

5.1.4 Vortex Flowmeters. 5-44

5.1.5 Paddle Wheel Flowmeters . 5-44

5.1.6 Watt Transducers. 5-45

5.1.7 Relative Humidity Sensor. 5-46

5.2 CONTROLS 5-46

5.2.1 Overview of Controls System . 5-46

5.2.2 Controls Hardware 5-47

6. INSTRUMENTATION CALIBRATION AND UNCERTAINTY ANALYSIS 6-54

6.1 INSTRUMENTATION CALIBRATION AND UNCERTAINTY.6-54

6.1.1 Thermocouples. 6-54

6.1.3 Flowmeters. 6-59

6.1.4 Watt Transducer. 6-62

6.1.5 Relative Humidity Sensor. 6-64

6.2 CALCULATED HEAT TRANSFER RATES .6-64

7. EXPERIMENTAL RESULTS 7-66

7.1 SYSTEM PERFORMANCE AND HEAT BALANCE 7-66

7.1.1 Heat Pump . 7-66

7.1.2 Storage Tanks. 7-76

7.1.3 Pond Loop Heat Exchanger. 7-79

7.1.4 Cooling Tower . 7-81

7.1.5 GLHE . 7-85

7.2 BOREHOLE IN-SITU TESTS.7-89

7.2.1 Undisturbed Ground Temperature 7-89

7.2.2 In-situ Results. 7-90

7.3 SYSTEM MODELING CONSIDERATIONS7-93

7.3.1 System Pressure Drop Characteristics 7-93

7.3.2 Source System Pumping Characteristic. 7-95

7.3.3 Circulation Piping Thermal Heat Transfer . 7-100

8. CONCLUSIONS AND RECOMMENDATIONS. 8-104

8.1 CONCLUSIONS .8-104

8.2 RECOMMENDATIONS AND FUTURE WORK 8-106

REFERENCES 109

APPENDICES. 112

APPENDIX A: DATA LOGGER CHANNELS. 112

APPENDIX B: PIPING SCHEMATIC AND BILL OF MATERIALS 113

APPENDIX C: STANDARD OPERATING PROCEDURES 120

APPENDIX D: EQUIPMENT SPECIFICATIONS . 126