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首页> 外文期刊>Renewable energy >Modeling and energy analysis of a linear concentrating photovoltaic system cooled by two-phase mechanical pumped loop system
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Modeling and energy analysis of a linear concentrating photovoltaic system cooled by two-phase mechanical pumped loop system

机译：两相机械泵送环系统冷却线性浓缩光伏系统的建模与能量分析

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摘要

Generally, the majority of the linear concentrating photovoltaic (LCPV) systems incorporated with active cooling systems use liquid water pump loop or conventional vapor compression refrigeration system. In this study, a new cooling system, so-called two-phase mechanical pumped loop (TMPL), is proposed to be used with LCPV system. The excess heat from photovoltaic (PV) cell is used to heat up water stored in a tank for residential purposes. The case study is Bogota in Colombia and we develop a dynamic simulation model for the LCPV-TMPL system. The design parameters of the TMPL system are the flow volumetric rate and saturation temperature of the refrigerant as well as the tube length of the condenser. Moreover, low global warming potential (GWP) refrigerants such as R1234yf and R1234ze(E) were evaluated, both showing the same performance compared to R134a. The results showed that the use of TMPL system to eliminate the generated heat of PV cell improves its temperature stability and efficiency. It also shows how the proposed model can be used to design the thermal/photovoltaic system for a local, showing also the expected performance before the system installation. In the case study region, the LCPV-TMPL system, using four PV cells with 5 m x 10 mm, produces power with an average monthly of 2 kW with a peak of 5 kWunder average and peak monthly solar radiation of 400 W/m(2) and 600 W/m(2), respectively. The storage tank can heat up 2.2 m(3) water per day from 8 degrees C to approximately 28 degrees C in an average sense. This means that the LCPV-TMPL system could save 9000 kWh and 1900 kWh per year in electricity and thermal energies (water heating). This system can be used locally with low or medium solar radiation and cold weather. (C)20 Elsevier Ltd. All rights reserved.
机译：通常，掺入有源冷却系统的大多数线性浓缩光伏（LCPV）系统使用液体水泵回路或传统的蒸汽压缩制冷系统。在本研究中，提出了一种新的冷却系统，所谓的两相机械泵送环（TMPL），用于与LCPV系统一起使用。来自光伏（PV）电池的过热用于加热储存在罐中的水以进行住宅目的。案例研究是哥伦比亚的波哥大，我们为LCPV-TMPL系统开发了一种动态仿真模型。 TMPL系统的设计参数是制冷剂的流量体积率和饱和温度以及冷凝器的管长度。此外，评估了低全球变暖电位（GWP）制冷剂，例如R1234YF和R1234ZE（E），均显示与R134A相比相同的性能。结果表明，使用TMPL系统消除PV电池产生的热量，提高了其温度稳定性和效率。它还显示了如何使用所提出的模型来设计局部的热/光伏系统，在系统安装之前也显示出预期的性能。在案例研究区域中，使用具有5 mx 10 mm的四个光伏电池的LCPV-TMPL系统产生电力，平均每月2千瓦，峰值为5kWWunder平均和峰值月度太阳辐射400 w / m（2分别为600 w / m（2）。储罐每天可以从8摄氏度从8摄氏度加热到大约28摄氏度。这意味着LCPV-TMPL系统可以节省9000千瓦时，每年电力和热能（水加热）。该系统可在局部使用，低或中型太阳辐射和寒冷的天气。 （c）20 Elsevier Ltd.保留所有权利。

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