氯化锂—硅胶吸附制冷机的实验及理论研究
发布时间：2018-10-08 20:35
【摘要】：全球总能耗一直处于稳定增长中且近期没有下降的迹象。对制冷的需求是导致能耗增加的主要原因之一，据估计制冷与空气调节系统的能耗约占全球总能耗的30%。因此，为了降低制冷系统的能耗，本课题研究了节能环保型吸附式制冷系统这一可持续的能量利用方式。本文对一台采用氯化锂-硅胶复合吸附剂的吸附制冷机组进行了理论和实验研究，研究内容主要包含不同循环的优化，工质对和工况对性能的影响。 实验结果显示在热水进口平均温度为83oC，，冷却水进口平均温度为26oC，冷冻水进口平均温度为15oC的实验工况下，测得的单位体积平均制冷量(SCP)和性能系数(COP)分别为286W/kg和0.48。测试时热水，冷却水，冷冻水的流量分别为0.22kg/s,0.39kg/s和0.09kg/s。尽管SCP和COP的实验结果已经令人满意，但通过对不同循环时间，进口热水温度和热水流量的进一步分析表明该机组可以实现更好的性能。实验得到的主要结论如下：(1)COP随SCP量的增大和循环时间的减小而增大；(2)当回热回质时间低于最优时间时，COP和SCP随其增大而增大；当回热时间高于最优时间时，COP和SCP随其增大而减小；(2)当热水进口温度处于60oC到90oC的范围内时，COP和SCP随进口热水温度的提高而增大，当超出90oC时其增大速率降低；（4）热水流量的增大会导致SCP的增大同时COP的降低，而热水流量的降低会导致SCP的降低和COP的增大。本研究推荐的该机组的最佳吸附/解析时间，回热时间，热水进口温度和热水流量分别为780s，60s，83oC和0.22kg/s。
[Abstract]:Global total energy consumption has been in steady growth and there is no sign of a recent decline. The demand for refrigeration is one of the main reasons for the increase in energy consumption. It is estimated that the energy consumption of refrigeration and air conditioning systems accounts for about 30% of the global total energy consumption. Therefore, in order to reduce the energy consumption of refrigeration system, the energy saving and environmental protection type adsorption refrigeration system is studied. In this paper, the theoretical and experimental study of a adsorption refrigeration unit with lithium chloride / silica gel composite adsorbent is carried out. The main contents of the study include the optimization of different cycles, the effects of working conditions and working conditions on the performance. The experimental results show that under the experimental conditions where the average inlet temperature of hot water is 83 OC, the average inlet temperature of cooling water is 26 OC and the average inlet temperature of frozen water is 15oC, the measured unit volume average refrigerating capacity (SCP) and performance coefficient (COP) are 286W/kg and 0.48 respectively. The flow rates of hot water, cooling water and frozen water were 0.22 kg / s 0.39 kg / s and 0.09 kg / s respectively. Although the experimental results of SCP and COP are satisfactory, the further analysis of different cycle time, inlet hot water temperature and hot water flow shows that the unit can achieve better performance. The main conclusions are as follows: (1) the COP increases with the increase of SCP and the cycle time, (2) the cop and SCP increase with the increase of the regenerative time when the regenerative time is lower than the optimal time. (2) when the inlet temperature of hot water is within the range of 60oC to 90oC, the cop and SCP increase with the increase of the inlet temperature of hot water, and the increasing rate decreases with the increase of the inlet temperature of hot water. (4) the increase of hot water flow will lead to the increase of SCP and the decrease of COP, while the decrease of hot water flow will lead to the decrease of SCP and COP. The optimum adsorption / desorption time, regenerative time, inlet temperature and flow rate of hot water are 780sm ~ (60) sm ~ (83) OC and 0.22 kg / s, respectively.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB657
本文编号：2258173
[Abstract]:Global total energy consumption has been in steady growth and there is no sign of a recent decline. The demand for refrigeration is one of the main reasons for the increase in energy consumption. It is estimated that the energy consumption of refrigeration and air conditioning systems accounts for about 30% of the global total energy consumption. Therefore, in order to reduce the energy consumption of refrigeration system, the energy saving and environmental protection type adsorption refrigeration system is studied. In this paper, the theoretical and experimental study of a adsorption refrigeration unit with lithium chloride / silica gel composite adsorbent is carried out. The main contents of the study include the optimization of different cycles, the effects of working conditions and working conditions on the performance. The experimental results show that under the experimental conditions where the average inlet temperature of hot water is 83 OC, the average inlet temperature of cooling water is 26 OC and the average inlet temperature of frozen water is 15oC, the measured unit volume average refrigerating capacity (SCP) and performance coefficient (COP) are 286W/kg and 0.48 respectively. The flow rates of hot water, cooling water and frozen water were 0.22 kg / s 0.39 kg / s and 0.09 kg / s respectively. Although the experimental results of SCP and COP are satisfactory, the further analysis of different cycle time, inlet hot water temperature and hot water flow shows that the unit can achieve better performance. The main conclusions are as follows: (1) the COP increases with the increase of SCP and the cycle time, (2) the cop and SCP increase with the increase of the regenerative time when the regenerative time is lower than the optimal time. (2) when the inlet temperature of hot water is within the range of 60oC to 90oC, the cop and SCP increase with the increase of the inlet temperature of hot water, and the increasing rate decreases with the increase of the inlet temperature of hot water. (4) the increase of hot water flow will lead to the increase of SCP and the decrease of COP, while the decrease of hot water flow will lead to the decrease of SCP and COP. The optimum adsorption / desorption time, regenerative time, inlet temperature and flow rate of hot water are 780sm ~ (60) sm ~ (83) OC and 0.22 kg / s, respectively.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB657
【参考文献】
相关期刊论文 前2条
1 刘业凤,王如竹;Pore structure of new composite adsorbent SiO_2·_xH_2O· yCaCl_2 with high uptake of water from air[J];Science in China(Series E:Technological Sciences);2003年05期
2 ;Adsorption refrigeration-green cooling driven by low grade thermal energy[J];Chinese Science Bulletin;2005年03期
本文编号：2258173
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