Experimental observations on performance of an air conditioning system controlling temperature and humidity independently
| Autor: | Chih-Chen Kao, 高志承 |
|---|---|
| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 This study observes performances of the hybrid liquid desiccant sys-tem (HLDS). The system controls the air humidity by using LiCl solution to remove the latent heat and then controls the air temperature by using the vapor compression refrigeration system. Different from the conventional air-conditioning system, this system controls the air humidity and temperature independently. In addition, this system uses the removal heat from the condenser of the vapor compression refrigeration system to restore LiCl solution back to the initial state for absorption. This is an energy-efficiency approach to heat LiCl solution. This study mainly observes the humidity and temperature conditions of the supply air loop at each stage with the heating and cooling modes of HLDS from March 1st to June 30th in 2016. This study observes the influences of different supply air conditions on the indoor air performances, and compares the relationship between the electricity power consumption of the system and the outdoor air conditions, namely humidity and temperature. During the dehumidification process, HLDS absorbs the water vapor in air by using the LiCl solution, instead of cooling down the air below the dew point temperature. HLDS has two modes: a cooling mode for the summer, and a heating mode for the winter. In cooling mode, it regulates absolute humidity of conditioned air to 9.5±1.5 g/kg. In the heating mode, it regulates the absolute humidity of conditioned air to 6.4±0.8 g/kg for the wet day case. However, for the dry day case, a very low value of absolute humidity 4.9±0.6 g/kg is maintained. According to the observation results, the coefficient of performance (COP) of HLDS is about 3.6 in the cooling mode, and the COP is about 2 for the wet day case and about 0.8 for the dry day case, respectively, in the heating mode. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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