Simulation analysis of overall heat loss coefficient of parabolic trough solar collector at computed optimal air gap

被引：10

作者：

Kumar, Devander ^{[1
]}

Kumar, Sudhir ^{[2
]}

机构：

[1] Technol Inst Text & Sci, Bhiwani 127021, Haryana, India

[2] Natl Inst Technol, Kurukshetra 136119, Haryana, India

来源：

INTERNATIONAL CONFERENCE ON RECENT ADVANCEMENT IN AIR CONDITIONING AND REFRIGERATION, RAAR 2016 | 2017年 / 109卷

关键词：

OHLC; PTC; Receiver tube; Glass envelope; Optimum air gap; RECEIVER; PERFORMANCE;

D O I：

10.1016/j.egypro.2017.03.057

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Parabolic trough collectors (PTC) are the highly popular systems employed for electricity generation, industrial process heating, steam generation, refrigeration and air conditioning, hot water production and its thermal efficiency directly depends on the overall heat loss coefficient (OHLC) of receiver and its operating temperature. Thus, the present study evaluates OHLC of receiver and heat loss components at optimum air gap and various parameters by iterative method. Results show that OHLC of receivers increases with increase in ambient temperature, wind velocity, receiver emissivity and temperature and decreases with increase in diameter. Lowest and highest loss factor are found as 5.55 Wm(-2)K(-1) and 10.97 Wm(-2)K(-1) for 7.62 cm and 1.2 cm receiver diameter respectively and convection/conductive losses are higher than radiation across the receiver. (C) 2017 The Authors. Published by Elsevier Ltd.

引用

页码：86 / 93

页数：8