Numerical simulation and design of a parabolic trough solar collector used as a direct generator in a solar-GAX cooling cycle

被引：9
作者：
Sauceda, Daniel [1 ]
Velazquez, Nicolas [1 ]
Garcia-Valladares, Octavio [2 ]
Beltran, Ricardo [1 ]
机构：
[1] Univ Autonoma Baja California, Ctr Estudios Energias Renovables, Mexicali 21280, Baja California, Mexico
[2] Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, Mexico
来源：
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2011年 / 25卷 / 06期
关键词：
Parabolic trough collector; Direct vapor generation; Ammonia-water mixture; Absorption refrigeration; DIRECT STEAM-GENERATION; HEAT-TRANSFER COEFFICIENTS; SYSTEM; MIXTURES;
D O I：
10.1007/s12206-011-0326-y
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this work, a solar parabolic trough collector (PTC) has been dimensioned and its technical feasibility has been evaluated in order to be used as ammonia direct vapor generator in an advanced absorption air-cooled Solar-GAX cycle of 10.6 kW cooling capacity. A detailed numerical simulation model that takes into account the geometry and the optical, thermal and fluid dynamic behavior of the PTC has been developed. The model has been solved in order to reach minimal thermal losses through the PTC, and maximum coefficient of performance (COP) of the Solar-GAX cycle. Under design conditions, the solar PTC efficiency, the COP of the Solar-GAX cycle and the global efficiency of the system were 0.62, 0.87 y and 0.54 respectively. The calculated efficiency is 25.5 % higher than that provided by a single effect water-lithium bromide cycle coupled in an indirect form with a solar PTC system.
引用
收藏
页码：1399 / 1408
页数：10
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