Evaluation of a stand-alone photovoltaic/thermal integrated thermoelectric water heating system
Evaluation of a stand-alone photovoltaic/thermal integrated thermoelectric water heating system
复制标题
独立光伏/热一体化热电热水系统的评估
DOI：
10.1016/j.renene.2020.09.105
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发表时间：
2020-12
期刊：
影响因子：
8.7
通讯作者：
Pengcheng Wang
中科院分区：
文献类型：
--
作者：
Yelin Zhang;Zhongbing Liu;Pengcheng Wang
减少建筑能耗、增加可再生能源的使用对于节能至关重要。光伏热电热泵被认为是为独立式住宅提供热水的可持续措施，尤其是那些甚至无法接入电网的独立式住宅。本文研究了一种独立的光伏/热集成热电热水系统（PV/T-TEWH）。开发并验证了 PV/T-TEWH 的动态模型。分别对拉萨、北京、长沙和广州的系统性能进行了仿真分析，并比较了系统的经济性。结果表明，拉萨电流小于等于1.4A，北京、长沙、广州电流小于等于1.0A时，PV/T-TEWH可以依靠其产生的电能，无需额外供电。 PV/T-TEWH系统的年总发热量随着工作电流的增加而增加，但系统的COP随着工作电流的增加而下降。当系统工作在0.6A、1.0A、1.4A和1.8A电流时，投资回收期随着电流的增加而缩短。拉萨的投资回收期是四个城市中最短的，工作电流为1.8A时，投资回收期仅为2.2年。PV/T-TEWH系统为建设热水供应提供了一种新方法，特别是对于偏远地区的独立式住宅。
Reducing building energy consumption and increasing the use of renewable energy are essential to energy conservation. Photovoltaic thermoelectric heat pumps have been considered as a sustainable measure to supply detached houses with hot water, especially those that even do not have access to the power grid. This paper investigates a stand-alone photovoltaic/thermal integrated thermoelectric water heating system (PV/T-TEWH). A dynamic model of PV/T-TEWH is developed and validated. The performance of the system in Lhasa, Beijing, Changsha and Guangzhou is simulated and analyzed respectively, and the economics of the system are compared. Results show that PV/T-TEWH can rely on the electric energy it generates without additional power supply when the current is less than or equal to 1.4 A in Lhasa and 1.0 A in Beijing, Changsha and Guangzhou. The annual total heat gain of the PV/T-TEWH system increases as the operating current increases, but the COP of the system falls with the rise of operating current. When the system is operating at the currents of 0.6 A, 1.0 A, 1.4 A, and 1.8 A, the payback period shortens with the increase of current. Lhasa has the shortest payback period among four cities and it is only 2.2 years when the working current is 1.8 A. The PV/T-TEWH system provides a new method for building hot water supply, especially for detached houses in remote areas.
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