Title Page
Abstract
Contents
Chapter 1. Introduction 11
1.1. Study Background 11
1.2. Purpose of Research 13
Chapter 2. Preliminary Study 16
2.1. Ground Source Heat Pump Overview 16
2.1.1. Ground Source Heat Pump Mechanism 16
2.1.2. Classification by the configuration 19
2.1.3. Arrangement of GHE 20
2.2. Literature Review 21
2.2.1. Performance of GHE 21
2.2.2. Experiments of Different Configuration GHE 22
2.2.3. Simulation Algorithm of GHE in Energy Plus 24
2.3. Literature Review Summary 30
Chapter 3. Mat-type GHE Research 32
3.1. Capillary Mat Simulation 32
3.1.1. Mat-type GHE Modelling 32
3.1.2. Pre-Simulation 36
3.2. Field Test 39
3.2.1. Field Test Overview 39
3.2.2. Experiment 41
3.2.3. Validation Simulation 42
3.3. Summary 49
Chapter 4. Mat-type GHE Application Plan 51
4.1. Simulation overview 51
4.1.1. Building model 51
4.2. simulation at office buildings 55
4.2.1. Simulation Overview 55
4.2.2. Simulation Results 56
4.3. simulation at residential buildings 60
4.3.1. Simulation Overview 60
4.3.2. Simulation Results 61
4.4. Adaptability analysis for modified system 66
4.4.1. Modified system overview 66
4.4.2. Simulation results 67
4.5. Summary 70
Chapter 5. Conclusion 72
Bibliography 75
국문 초록 78
〈Table 3.1〉 Capillary mat properties 32
〈Table 3.2〉 Simulation for mat-type GHE Input Summary 37
〈Table 3.3〉 Experiment results 41
〈Table 3.4〉 Soil properties 44
〈Table 4.1〉 Thermal transmittance and floor plan of simulation model 52
〈Table 4.2〉 Simulation cases 53
〈Table 4.3〉 Case 1, Case 2 Simulation input values 55
〈Table 4.4〉 Energy consumption and COP of heat pump 56
〈Table 4.5〉 Case 3, Case 4 Simulation input values 61
〈Table 4.6〉 Energy consumption and COP of heat pump 62
〈Table 4.7〉 Energy consumption and COP of heat pump 67
[Figure 1.1] energy consumption by source and sector, 2021 12
[Figure 1.2] Research flow chart 15
[Figure 2.1] Underground Heat Flow Diagram for Heating and Cooling Operations 18
[Figure 2.2] Classification of GSHPs by heat source and configuration 19
[Figure 2.3] Schematic Design of Series and Parallel Connections of Horizontal and Vertical Systems 20
[Figure 2.4] Interval Control and Heat Exchange rate 23
[Figure 2.5] Temperature response factors (g-functions) for various multiple borehole configurations compared to the temperature response... 24
[Figure 2.6] Piechowski Coordinate System 25
[Figure 2.7] Schematic for deviation of the circulating fluid energy balance for the control length of pipe 27
[Figure 2.8] Schematic for the calculation of the outer boundary temperature for the radial region 29
[Figure 3.1] Capillary mat pipe cross section 33
[Figure 3.2] Capillary mat (4 module) configuration 33
[Figure 3.3] Capillary mat input diagram 34
[Figure 3.4] Capillary mat modelling in EnergyPlus "Underground:PipingSystem' class 35
[Figure 3.5] Simulation System diagram 36
[Figure 3.6] Indoor and outdoor air temperature profile 37
[Figure 3.7] Incheon region annual ground temperature by depth 37
[Figure 3.8] EFT and LFT profile during 1/1~2/27 38
[Figure 3.9] GHE installation location (Asan-si) 39
[Figure 3.10] Mat-type GHE installation 40
[Figure 3.11] Pipes from underground GHE 40
[Figure 3.12] Site soil photo 43
[Figure 3.13] Inju-myeon Annual Outdoor Temperature 45
[Figure 3.14] Annual ground temperature simulation result 45
[Figure 3.15] Simulation result of ground temperature vs depth 46
[Figure 3.16] Rejection test simulation system diagram 47
[Figure 3.17] Simulation Results 48
[Figure 4.1] Building overview and conditioning Zone 52
[Figure 4.2] System diagram 54
[Figure 4.3] Room temperature during Case1 and Case2 57
[Figure 4.4] Outdoor air temperature 57
[Figure 4.5] Heat absorption rate from ground at Case1 and Case2 58
[Figure 4.6] Heat pump EFT/LFT at Case1 58
[Figure 4.7] Heat pump EFT/LFT at Case2 59
[Figure 4.8] Room temperature during Case3 and Case4 63
[Figure 4.9] Outdoor air temperature 63
[Figure 4.10] Heat absorption rate from ground at Case3 and Case4 64
[Figure 4.11] Heat pump EFT/LFT at Case3 64
[Figure 4.12] Heat pump EFT/LFT at Case4 65
[Figure 4.13] Heat absorption rate from ground at Case3 and Case3* 68
[Figure 4.14] Heat absorption rate from ground at Case4 and Case4* 68
[Figure 4.15] Heat pump EFT/LFT at Case3 and Case3* 69
[Figure 4.16] Heat pump EFT/LFT at Case4 and Case4* 69