SIMULATION, MODELING AND ANALYSIS OF A WATER TO AIR HEAT

1,93

MB

PUMP

132

stron

6388

ID

Oklahoma State University

2005

rok

TABLE OF CONTENTS

1. INTRODUCTION.1

1.1.Background1

1.2.Thesis Objective and Scope.2

2. LITERATURE REVIEW..3

2.1. Equation fit water to air heat pump and chiller models.3

2.1.1. Lash Model3

2.1.2. Allen and Hamilton Model..5

2.1.3. DOE-2 Model7

2.1.4. BLAST Model.7

2.1.5. Hamilton and Miller Model 9

2.1.6. Parent and Larue development of Domanski Model10

2.2. Jin and Spitler’s Parameter estimation water to air heat pump Model.11

2.2.1. Overview11

2.2.2. Parameter estimation procedure.. ..14

2.2.3. Model Implementation.15

3. OVERVIEW OF ENERGYPLUS17

3.1. Introduction.17

3.2. Simulation Environment.17

3.3. Water Source Heat pumps in EnergyPlus.20

3.3.1. Water to air heat pump simulation..20

3.3.2. Water to Water heat pump simulation.21

3.4. Implementing water-to-air heat pump models in EnergyPlus.22

4. MODEL DEVELOPMENT AND IMPLEMENTATION24

4.1. Development of the simplified water to air heat pump model24

4.2. Design Basis..24

4.2.1. Cooling Mode Equations...27

4.2.2. Heating Mode Equations...31

4.2.3. Accommodating Variable mass flow rates..32

4.2.4. Determination of Performance coefficients.33

4.2.5. Performance coefficients calculation procedure34

4.3. Model Implementation.35

4.3.1. Input Configuration36

4.3.2. Input Specification.37

4.3.3. Flow of Control/ Implementation Algorithm.41

4.3.4. Output arrangement45

5. MODEL VERIFICATION46

5.1. Introduction.. .46

5.2. Cooling Mode Verification..46

5.3. Heating Mode Verification..51

5.4. Verification using Correction Factors. 55

5.4.1. Correction Factors55

5.4.2. Comparison of simulated and measured data using correction factors57

5.4.2.1.Comparison procedure.58

5.4.2.2.Results..60

5.4.3. Application of the model outside the catalog data sets .64

6. MODEL APPLICATION67

6.1. Using Manufacturers data. 67

6.1.1. Example 1 Florida Heat Pump.68

6.1.2. Example 2 ClimateMaster..70

6.1.3. Example 3 TRANE..72

6.2. Case Study. .76

6.2.1. Example Building and System description76

6.2.2. System connections and configuration..78

6.2.3. Annual and Design day Building Load Profiles .79

6.2.4. Selection of Heat pump82

6.2.5. Cooling mode operation and analysis83

6.2.6. Heating mode operation and analysis86

6.2.7. Model validation by comparison with the detailed model89

6.2.8. Model performance under off design conditions..92

6.2.9. Annual Simulation Computation time94

7. PERFORMANCE COEFFICIENT CALCULATOR.95

7.1. Need for an Interface.. 95

7.2. Front end architecture. 95

7.2.1. Workspace.95

7.2.2. Input format..100

7.2.3. Reporting results.104

7.3. Backend architecture.. .106

8. CONCLUSIONS AND RECOMMENDATIONS107

8.1. Conclusions..107

8.2. Recommendations..110

References.111

Appendix A.113