太阳能驱动微通道换热器室内散热实验研究
发布时间：2018-11-08 11:14
【摘要】：随着经济的快速发展和人们生活质量的提高,我国建筑能耗的数量逐年上升。建筑能耗中制冷和供暖约占建筑总能耗的15%。面对数量如此巨大的能耗,降低空调能耗是势在必行的。太阳能在节约建筑能耗方面具有很大的潜力,利用太阳能可以满足生活用水和室内供暖这类建筑能耗的需求。本课题利用太阳能,以分离式热管为传热元件,微通道作为室内散热器,提出一种微通道散热器分离式热管太阳能供热系统,对房间进行供暖,实现了建筑一体化。与传统热管相比,分离式热管可以远距离传输热量,布置灵活,将微通道换热器作为室内散热装置,可以获得更高的效率和室内舒适性。该系统最大的特点是仅利用太阳能和热管内工质的相变循环,即可实现建筑采暖,可以大大减少冬季建筑采暖能耗。在搭建的分离式热管太阳能室内供热系统试验台上,针对南京地区冬季气候特征,于2016年12月进行了实验测试。针对以下主要内容进行研究:(1)室内散热装置不同时系统性能研究。连续四天测试不同太阳辐射强度下系统散热量、室内温度等参数,与常规散热器供热系统进行性能对比。结果表明,微通道散热器供热系统的热工性能均处在较好水平,室内温度达到18℃以上,供热时间5小时,是很好的辅助室内供热装置。(2)针对不同太阳辐射强度下对比系统热工性能的影响进行分析研究。结果发现:太阳辐射强度对系统散热量、热效率、集热器进出口温差影响较大,三者随辐照强度增大而增大,但增加趋势变缓;系统各参数变化趋势相比于太阳辐射强度有滞后,滞后约30分钟;在冬季天气状况良好的寒冷条件下,微通道散热器供热系统热效率达42%以上。(3)针对不同风量下对微通道散热器供热系统热工性能的影响进行了分析研究,结果发现:风量对微通道散热器供热系统散热量、系统热效率、集热器进出口温差方面影响较大。三者随风量的增大而增大,但由于换热时间缩短,增大趋势变缓。风量的改变对室内温度影响较小,室内温度在18℃以上,滞后室外温度变化约1小时。风量较小时,散热器表面温度较高,但随着风量增大,对表面温度的影响变小。
[Abstract]:With the rapid development of economy and the improvement of people's quality of life, the quantity of building energy consumption in China is increasing year by year. In building energy consumption, refrigeration and heating account for about 15% of total building energy consumption. In the face of such a large number of energy consumption, it is imperative to reduce the energy consumption of air conditioning. Solar energy has great potential in saving building energy consumption. Solar energy can meet the needs of building energy consumption such as domestic water and indoor heating. Using solar energy as heat transfer element and microchannel as indoor radiator, this paper presents a separate heat pipe solar heating system for micro channel radiator, which can heat the room and realize the integration of architecture. Compared with the traditional heat pipe, the separated heat pipe can transfer heat over long distance, and the arrangement is flexible. Using the micro-channel heat exchanger as the indoor heat dissipation device, it can obtain higher efficiency and indoor comfort. The biggest characteristic of this system is that only using the phase change cycle of working fluid in solar energy and heat pipe can realize the building heating and can greatly reduce the energy consumption of building heating in winter. An experimental test was carried out in December 2016 on a separate heat pipe solar indoor heating system test rig for the winter climate in Nanjing area. The main contents are as follows: (1) the system performance of indoor heat dissipation device is studied at different time. The heat emission and indoor temperature of the system under different solar radiation intensities were measured for four consecutive days, and the performance of the system was compared with that of the conventional radiator heating system. The results show that the thermal performance of the micro-channel radiator heating system is at a good level, the indoor temperature is above 18 鈩，
本文编号：2318319
[Abstract]:With the rapid development of economy and the improvement of people's quality of life, the quantity of building energy consumption in China is increasing year by year. In building energy consumption, refrigeration and heating account for about 15% of total building energy consumption. In the face of such a large number of energy consumption, it is imperative to reduce the energy consumption of air conditioning. Solar energy has great potential in saving building energy consumption. Solar energy can meet the needs of building energy consumption such as domestic water and indoor heating. Using solar energy as heat transfer element and microchannel as indoor radiator, this paper presents a separate heat pipe solar heating system for micro channel radiator, which can heat the room and realize the integration of architecture. Compared with the traditional heat pipe, the separated heat pipe can transfer heat over long distance, and the arrangement is flexible. Using the micro-channel heat exchanger as the indoor heat dissipation device, it can obtain higher efficiency and indoor comfort. The biggest characteristic of this system is that only using the phase change cycle of working fluid in solar energy and heat pipe can realize the building heating and can greatly reduce the energy consumption of building heating in winter. An experimental test was carried out in December 2016 on a separate heat pipe solar indoor heating system test rig for the winter climate in Nanjing area. The main contents are as follows: (1) the system performance of indoor heat dissipation device is studied at different time. The heat emission and indoor temperature of the system under different solar radiation intensities were measured for four consecutive days, and the performance of the system was compared with that of the conventional radiator heating system. The results show that the thermal performance of the micro-channel radiator heating system is at a good level, the indoor temperature is above 18 鈩，
本文编号：2318319
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