期刊
APPLIED THERMAL ENGINEERING
卷 67, 期 1-2, 页码 168-178出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2014.03.023
关键词
Waste heat recovery; Organic Rankine cycle; Parametric analysis; Diesel engine; Dual loop
资金
- National Natural Science Foundation of China [51376011]
- Beijing Natural Science Foundation Program and Scientific Research Key Program of Beijing Municipal Commission of Education [KZ201410005003]
- National Basic Research Program of China (973 Program) [2011CB707202]
- National High-Tech Research and Development Program of China (863 Program) [2009AA05Z206]
The maximum potential of a dual-loop organic Rankine cycle (ORC) applied to a light-duty diesel engine is analyzed over the engine's operational range by developing a mathematical model based on physical processes and boundary conditions specified according to measured data from an engine test. We further evaluate the effects of three working parameters-expander isentropic efficiency, evaporation pressure of the high-temperature loop, and condensation temperature of the low-temperature loop-on the performance of the dual-loop ORC system. The results show that using the proposed dual-loop ORC system improves the net power output of a diesel automotive engine by 19-22% in the peak thermal-efficiency region under allowable working conditions of the engine, and by 53-72% in the high-speed and low-load regions. Over the engine's entire operational range, the effective thermal efficiency increases by a maximum of 8%. Moreover, the expander isentropic efficiency and the condensation temperature of the low-temperature loop are two critical parameters that affect combined system performance. (C) 2014 Elsevier Ltd. All rights reserved.
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