Performance analysis of zeotropic mixtures for the dual-loop system combined with internal combustion engine

Zhou, Yaodong; Wu, Yuandan; Li, Feng; Yu, Liang

doi:10.1016/j.enconman.2016.04.006

Cited by 38 publications

(12 citation statements)

References 17 publications

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“…Regard to the waste heat of internal combustion engine, the waste heat could be used for the domestic hot water in summer and auxiliary heating in winter [24]. In another aspect, the organic Rankine cycle has been proven to be one of the most effective solutions for engine waste heat recovery, and the thermodynamic and experimental studies have been investigated [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Liu

Zhou

Zhao

2016

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 99%

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Liu

Zhou

Zhao

2016

Energy Conversion and Management

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“…The exhaust gas mass flow rate is 7139 kg/h; the jacket cooling water mass flow rate and temperature are 6876 kg/h and 363.15 K, correspondingly [18]. The PPTD of the HTL evaporator is the largest [5,19] because the heat transfer performance of engine exhaust gas is low; the PPTD of the HTL evaporator is set to 20 K on the basis of Literature [18,43]; the PPTDs of the LTL preheater and condenser/evaporator are set to 10 K on the basis of Literature [40,43]; and PPTD of 5 K is common for an LTL condenser [5,19,40,43]. The DORC parameters are listed in Table 6 [43].…”

Section: Optimization Methodsmentioning

confidence: 99%

“…For HTL: An HTL working fluid pump pressurizes saturated liquid from a condenser/evaporator to an HTL evaporation pressure (1)(2). The high-pressure liquid absorbs heat from an engine exhaust gas in the HTL evaporator and is heated to a saturated or superheat vapor (2)(3)(4)(5). The saturated or superheated vapor from the HTL evaporator enters the HTL turbine and expands to perform work (5)(6).…”

Section: System Modelmentioning

confidence: 99%

“…The high-pressure liquid absorbs heat from an engine exhaust gas in the HTL evaporator and is heated to a saturated or superheat vapor (2)(3)(4)(5). The saturated or superheated vapor from the HTL evaporator enters the HTL turbine and expands to perform work (5)(6). The exhaust vapor exits from the HTL turbine and then enters the condenser/evaporator to release heat to the LTL (6-1).…”

Section: System Modelmentioning

confidence: 99%

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Thermodynamic Performance Analyses and Optimization of Dual-Loop Organic Rankine Cycles for Internal Combustion Engine Waste Heat Recovery

Duan

et al. 2019

Applied Sciences

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Waste heats of an internal combustion engine (ICE) are recovered by a dual-loop organic Rankine cycle (DORC). Thermodynamic performance analyses and optimizations are conducted with 523.15–623.15 K exhaust gas temperature (Tg1). Cyclopentane, cyclohexane, benzene, and toluene are selected as working fluids for high-temperature loop (HTL), whereas R1234ze(E), R600a, R245fa, and R601a are selected as working fluids for low-temperature loop (LTL). The HTL evaporation temperature, condensation temperature, and superheat degree are optimized through a genetic algorithm, and net power output is selected as the objective function. Influences of Tg1 on system net power output, thermal efficiency, exergy efficiency, HTL evaporation temperature, HTL condensation temperature, HTL superheat degree, exhaust gas temperature at the exit of the HTL evaporator, heat utilization ratio, and exergy destruction rate of the components are analyzed. Results are presented as follows: the net power output is mainly influenced by HTL working fluid. The optimal LTL working fluid is R1234ze(E). The optimal HTL evaporator temperature increases with Tg1 until it reaches the upper limit. The optimal HTL condensation temperature increases initially and later remains unchanged for a cyclopentane system, thus keeping constant for other systems. Saturated cycle is suitable for cyclohexane, benzene, and toluene systems. Superheat cycle improves the net power output for a cyclopentane system when Tg1 is 568.15–623.15 K.

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“…Abadi et al 28 analyzed the R245fa/R134a mixture in a small-scale ORC experimentally. The experiment was performed using a 1-kW scroll expander, and the heat source temperature ranged from 80 C to 120 C. Zhou et al 29 presented a dual-loop system that used organic mixtures RC318/R1234yf, butane/R1234yf, and RC318/R245fa to recycle the waste heat from jacket cooling water of an internal combustion engine. Using R1234yf/R32 as the working fluid, Yang et al 30 investigated the thermo-economic performance of the transcritical organic Rankine cycle system for the lowergrade waste heat recovery of a diesel engine.…”

Section: Introductionmentioning

confidence: 99%

Optimum composition ratios of multicomponent mixtures of organic Rankine cycle for engine waste heat recovery

Yang¹,

Yeh

2019

Int J Energy Res

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With the temperature glide in saturation states, the mixture working fluids have the advantages in thermal energy conversion. In this study, through the investigation in optimum mass fractions of multicomponent mixture working fluids, the economic performance enhancement of the organic Rankine cycle system is obtained for recovering waste heat from engine. The zero ozonedepletion-potential and dry working fluids of R236fa, R245fa, and R1336mzz (Z) are selected as the components of multicomponent mixtures in the system. The net power output, heat transfer calculation, and apparatus cost evaluation are employed to evaluate the power cost of the organic Rankine cycle system. Parameters of temperatures of waste heat sources and efficiencies of expanders are taken into account. The comparisons of economic performances for singlecomponent working fluid and multicomponent mixtures with optimum mass fractions are proposed. The results show that R245fa, having a levelized cost of energy, LCOE, of 8.75 × 10 −2 $/kW-h, performs the best for single-component working fluids, better than R236fa by 1.6% and R1336mzz(Z) by 8.3%. All the two-component mixtures are superior to their single-component working fluids in economic performance. Among the three two-component mixture working fluids, R1336mzz(Z)/R236fa has the lowest LCOE min , 8.57 × 10 −2$/kW-h, followed by R236fa/R245fa and R245fa/R1336mzz(Z). In addition, R236fa/R245fa/R1336mzz(Z) mixture, which has a LCOE min of 8.47 × 10 −2 $/kW-h, economically outperforms all other working fluids and has a lower LCOE min than R236fa/R245fa by 1.7% and R245fa/R1336mzz(Z) by 2%. K E Y W O R D Scomposition ratio, economic performance, multicomponent mixture, organic rankine cycle, working fluid

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Performance analysis of zeotropic mixtures for the dual-loop system combined with internal combustion engine

Cited by 38 publications

References 17 publications

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Thermodynamic Performance Analyses and Optimization of Dual-Loop Organic Rankine Cycles for Internal Combustion Engine Waste Heat Recovery

Optimum composition ratios of multicomponent mixtures of organic Rankine cycle for engine waste heat recovery

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