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研究生： 撒戈多
Iñigo Sagardoy Zaro
論文名稱： 台南地區太陽能輔助除濕空調系統實驗模擬
Solar Assisted Desiccant Air Conditioning System Simulation in Tainan location
指導教授： 吕宗行
Leu, Tzong-Shyng Jeremy
學位類別： 碩士
Master
系所名稱： 工學院 - 能源工程國際碩博士學位學程
International Master/Doctoral Degree Program on Energy Engineering
論文出版年： 2021
畢業學年度： 110
語文別： 英文
論文頁數： 161
外文關鍵詞： Solar desiccant wheel, Cooling system, Thermal comfort, Thermal solar
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    • 太陽能輔助乾燥劑冷卻系統是空調系統中一種具有吸引力且具有成本效益的應用。研究太陽能輔助乾燥劑冷卻系統的兩種配置，在台灣炎熱潮濕的天氣下，使用 TRNSYS 模擬了 8760 小時的通風和再循環模式。 在每個配置的不同點評估重要參數，如室溫和濕度比。對總體性能係數和太陽能係數進行計算和比較後，冷負荷容量估計為2 kw、其中顯冷負荷為1.5 kw、潛冷負荷為0.5 kw，並發現在特定條件下通風和再循環模式的 COP 和太陽能係數值彼此接近。研究比較質量流量、除濕輪性能和濕度比設定值對COP和太陽能係數的影響。實現了通過降低質量流量，使兩種配置的 COP 和太陽能係數都將增加，對於再循環模式來說此次數值增量略高。乾燥劑轉輪性能值也對每種模式產生不同的影響。值得注意的是，乾燥劑轉輪性能的降低也會降低 COP 和太陽能係數。該參數的影響在再循環模式中再次增高。最後，研究了濕度比設置值的影響以實現通過降低濕度比設定值達成降低COP 和太陽能係數。

    Solar assisted desiccant cooling system is an innovative and efficient system which can play a key role as an air conditioning system. Two different system configurations have been studied in the present research: Ventilation and Recirculation. Both configurations were simulated using TRNSYS for 8760 hours of operation under weather conditions in Taiwan. Important parameters as, room temperature and humidity ratio were calculated for each configuration at different points. Overall coefficient of performance and solar factor were calculated and compared as well. The total cooling load of the system is calculated as 2 [kW] where 1.5 [kW] accounts for sensible cooling load and 0.5 [kW] for latent cooling load. COP and solar factor values for both modes under specific conditions were found to be close between each other. The influence on COP and solar factor of mass flow rate, desiccant wheel performance and humidity ratio set up value were studied and compared. It was achieved that by decreasing the mass flow rate the COP and solar factor of both configurations will increased. This increment is slightly higher for the recirculation mode. The desiccant wheel performance value also influences differently each mode. It was noticed that a decrease in the desiccant wheel performance will decreased the COP and solar factor as well. The influence of this parameter is again higher in the recirculation mode. Finally, the influence of the humidity ratio set up value was studied. It was achieved that by decreasing the humidity ratio set up value the COP and Solar factor will decreased.

    Abstract i Acknowledgement ii Table of Contents iii List of Table vii List of Figures x List of Symbols xiii Chapter 1 Introduction 1 1.1 Background 1 1.2 Research goals 2 Chapter 2 Literature review 3 Chapter 3 Methodology 7 3.1 Approach 7 3.2 Research tool (TRNSYS) 8 3.3 Components Description 9 3.3.1 Data input and treatment components 12 3.3.2 Process components 13 3.3.3 Data output components 17 3.4 Mathematical models 18 3.4.1 Solar system 19 3.4.2 Air system 29 3.4.3 Heat exchanger 39 3.5 Modelling of solar desiccant cooling system 42 3.5.1 Solar system 42 3.5.2 Air system 43 3.5.3 Ventilation Mode 43 3.5.4 Recirculation Mode 46 3.5.5 Validation 48 3.6 Model component parameter calculation 53 3.6.1 Data Reader 53 3.6.2 Rotary Desiccant Dehumidifier 55 3.6.3 Energy Rate Load Conversion 57 3.6.4 Air to Air Heat Recovery 69 3.6.5 Evaporative Cooler 70 3.6.6 Single Speed Fan 71 3.6.7 Radiation Processor 73 3.6.8 Solar collector 75 3.6.9 Constant Speed Pump 82 3.6.10 Storage Tank 84 3.6.11 Heat Exchanger 87 3.7 Solar system simulation validation for a constant load of air 89 3.8 Determination of the COP 95 3.9 Determination of solar factor 98 Chapter 4 Results and discussion 101 4.1 Results of Ventilation Mode 104 4.1.1 Temperature and humidity ratio 104 4.1.2 Psychometric chart 107 4.1.3 COP and Solar factor 108 4.2 Results recirculation 111 4.2.1 Temperature and humidity ratio 111 4.2.2 Psychometric chart 114 4.2.3 COP and Solar factor 115 4.3 Mass flow rate parameter study 117 4.3.1 Mass flow rate 1000 kg/h 118 4.3.2 Mass Flow rate 750 kg/h 121 4.3.3 Mass Flow rate 500 kg/h 124 4.3.4 Mass flow rate comparison 127 4.4 Desiccant Wheel performance 130 4.4.1 Moderate performance 130 4.4.2 Low performance 134 4.4.3 Desiccant Wheel performance comparison 137 4.5 Humidity ratio 141 4.5.1 Humidity ratio 0.009 141 4.5.2 Humidity ratio 0.007 145 4.5.3 Humidity ratio comparison 148 Chapter 5 Conclusions and future work 151 5.1 Conclusions 151 5.2 Future research direction 154 Appendix 155 Reference 158

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