分离式太阳能热管供暖装置及充液率研究
发布时间：2019-04-22 19:14
【摘要】：太阳能在建筑中具有很大的利用潜力,利用太阳能可以满足生活热水与供暖此类低品位能耗的需求。本课题采用太阳能为热源,以分离式热管作为传热元件,将壁挂式太阳能热水器与内墙相结合,提出一种分离式太阳能热管供暖装置,利用内墙辐射对房间进行供暖,同时具备供生活热水功能。本装置采用太阳能运行,不消耗额外动力,同时实现了各构件与建筑的一体化结合。分离式太阳能热管供暖装置将太阳能转换成热水,利用热管汽化潜热高效传递热能的特性将热量传递至内墙,由墙体进行蓄热放热实现供暖。其主要组成构件为集热器、储热水箱、分离式热管、内墙。相比于其他供暖方式,分离式太阳能热管供暖装置具有采用清洁的可再生能源为热源、高效传热、舒适、隐蔽性好、无动力供暖等优点及局限于白天集热,夜间放热等不足。本课题选取了南京地区某住宅楼南向标准层的两个房间,对装置的核心传热元件分离式热管进行设计。首先根据热源条件,选择合适的工作介质,计算比较水和氨在不同工作温度下对热管性能影响较为关键的热物理性质,得出最合适的工作介质为水,热管工作温度为40℃,工作压力为7375 Pa;然后选择管壳材料及尺寸,最佳为304不锈钢,管径16mm,壁厚1mm,并进行压力校核。最后说明了充液率对热管的影响及其两种计算方法,R1为满足热管运行下蒸发段的充液量不烧干时的充液率,R2为热管达到稳定工作状态下,综合考虑蒸汽上升管、液体下降管及冷凝段时的充液率。结果表明：蒸发段和冷凝段管长变化时对R2值几乎没有影响,而液体下降管对R2值影响较大,液体下降管对R1值的影响大于于蒸发段和冷凝段对R1值的影响；可以通过增加分离式热管冷凝段的管排数来减少管内的充液率,当蒸发段的管排数为3,冷凝段的管排数为4～6时,管内的充液率值较为稳定；管内温度在40℃左右变化时对分离式热管的充液率值影响不大。
[Abstract]:Solar energy has great potential in building, and it can meet the demand of low-grade energy consumption such as domestic hot water and heating. In this paper, solar energy is used as heat source, separated heat pipe is used as heat transfer element, wall-mounted solar water heater is combined with inner wall, and a separate solar heat pipe heating device is put forward, which uses internal wall radiation to heat the room. At the same time, it has the function of supplying hot water for life. This device uses solar energy, no additional power consumption, and realizes the integration of each component and building. The separated solar heat pipe heating device converts the solar energy into hot water. The heat is transferred to the inner wall by the heat pipe vaporization latent heat and the heat transfer is realized by the heat storage and heat release of the wall. Its main components are collector, heat storage tank, separate heat pipe, inner wall. Compared with other heating methods, the separated solar heat pipe heating device has the advantages of adopting clean renewable energy as the heat source, high efficiency heat transfer, comfort, good concealment, no power heating and so on. It is limited to the heat collection during the day and the heat release at night and so on. In this paper, two rooms on the south standard floor of a residential building in Nanjing are selected to design the separated heat pipe of the core heat transfer element of the device. First of all, according to the heat source condition, select the suitable working medium, calculate and compare the key thermophysical properties of water and ammonia on the performance of heat pipe under different working temperature. The most suitable working medium is water, the working temperature of the heat pipe is 40 鈩，
本文编号：2463121
[Abstract]:Solar energy has great potential in building, and it can meet the demand of low-grade energy consumption such as domestic hot water and heating. In this paper, solar energy is used as heat source, separated heat pipe is used as heat transfer element, wall-mounted solar water heater is combined with inner wall, and a separate solar heat pipe heating device is put forward, which uses internal wall radiation to heat the room. At the same time, it has the function of supplying hot water for life. This device uses solar energy, no additional power consumption, and realizes the integration of each component and building. The separated solar heat pipe heating device converts the solar energy into hot water. The heat is transferred to the inner wall by the heat pipe vaporization latent heat and the heat transfer is realized by the heat storage and heat release of the wall. Its main components are collector, heat storage tank, separate heat pipe, inner wall. Compared with other heating methods, the separated solar heat pipe heating device has the advantages of adopting clean renewable energy as the heat source, high efficiency heat transfer, comfort, good concealment, no power heating and so on. It is limited to the heat collection during the day and the heat release at night and so on. In this paper, two rooms on the south standard floor of a residential building in Nanjing are selected to design the separated heat pipe of the core heat transfer element of the device. First of all, according to the heat source condition, select the suitable working medium, calculate and compare the key thermophysical properties of water and ammonia on the performance of heat pipe under different working temperature. The most suitable working medium is water, the working temperature of the heat pipe is 40 鈩，
本文编号：2463121
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