Thermal performance investigation of the flat and spherical dimple absorber plate solar air heaters

被引：63

作者：

Perwez, Ashif ^{[1
]}

Kumar, Rakesh ^{[1
]}

机构：

[1] Indian Inst Technol, Indian Sch Mines, Dept Mech Engn, Dhanbad 826004, Bihar, India

来源：

SOLAR ENERGY | 2019年 / 193卷

关键词：

Flat absorber plate; Solar air heater; Nusselt number; Spherical dimple absorber plate; THERMOHYDRAULIC PERFORMANCE; RIB ROUGHNESS; DESIGN; DUCT; PASS; OPTIMIZATION; COLLECTORS; FRICTION; ELEMENTS; SINGLE;

D O I：

10.1016/j.solener.2019.09.066

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

An experimental investigation has been conducted to determine the thermal performance of a spherical dimple plate solar air heater (SDPSAH) and a flat plate solar air heater (FPSAH) at distinctive environmental conditions at IIT (ISM) Dhanbad (23.79 degrees N), India. The study has been conducted for a mass flow rate of air varying from 0.009 kg/s to 0.028 kg/s. The results indicate that the SDPSAH shows the highest heat transfer rate, which is about 1.51 to 1.64 times higher than the corresponding FPSAH. The maximum rise of the outlet temperature of the SDPSAH is about 4.6 degrees C greater than the corresponding FPSAH for 0.009 kg/s mass flow rate of air. The instantaneous thermal efficiency of the SDPSAH is about 23.45% to 35.50% greater than the corresponding FPSAH.

引用

页码：309 / 323

页数：15

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