Enhancement efficiency of organic Rankine cycle by using sorption system

被引：17
作者：
Chaiyat, Nattaporn [1 ]
Wakaiyang, Yiayang [1 ]
Inthavideth, Xangpheuak [1 ]
机构：
[1] Maejo Univ, Sch Renewable Energy, Chiang Mai, Thailand
来源：
APPLIED THERMAL ENGINEERING | 2017年 / 122卷
关键词：
Sorption system; Absorption system; Adsorption system; Organic Rankine cycle; Levelized electricity cost; ABSORPTION-REFRIGERATION SYSTEM; EXERGY ANALYSIS; WORKING FLUID; CONDENSATION TEMPERATURE; COMBINED POWER; WASTE HEAT; PERFORMANCE; OPTIMIZATION; DESIGN; DRIVEN;
D O I：
10.1016/j.applthermaleng.2017.05.028
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This paper focuses a method to enhance an organic Rankine cycle (ORC) efficiency by using the sorption systems (absorption and adsorption) for reducing the ORC condenser temperature. Energy efficiency, exergy efficiency and levelized electricity cost (LEC) are used to evaluate the optimal combined unit. Testing data from a 25 kW(e) R-245fa ORC prototype, a 1 TR water-LiBr absorption chiller and a 1 TR water-silica gel adsorption refrigeration are tested and analyzed performance curve of each technology to predict thermal performance of the ORC-sorption units at various operating conditions. Projection of the integrating unit of the ORC and sorption systems represent the better energy and exergy efficiencies, when the ORC condenser temperature is decreased. The ORC-absorption efficiencies in terms of energy and exergy increase 7.22%, while the ORC-adsorption system improve 12.46% compared with the normal ORC efficiencies. In economic impact, the LEC of the normal ORC unit is 0.1145 USD/kW h, which is higher than the ORC-absorption unit and the ORC-adsorption unit of 0.1088 USD/kW h and 0.1043 USD/kW h, respectively, at chilled water temperature output the absorption system at 7 degrees C. Thus, it could be concluded that the ORC-adsorption system is the optimal technique to enhance the ORC electricity generation process in terms of energy efficiency, exergy efficiency and electricity cost. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：368 / 379
页数：12
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