scholarly journals Organic Rankine Cycle Waste Heat Recovery for Passenger Hybrid Electric Vehicles

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4532 ◽  
Author(s):  
Wan Rashidi Bin Wan Ramli ◽  
Apostolos Pesyridis ◽  
Dhrumil Gohil ◽  
Fuhaid Alshammari
Keyword(s):  
Electric Vehicles ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Hybrid Electric Vehicles ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Hybrid Vehicle ◽  
Driving Cycle ◽  
Hybrid Electric

Electrification of road transport is a major step to solve the air quality problem and general environmental impact caused by the still widespread use of fossil fuels. At the same time, energy efficiency in the transport sector must be improved as a steppingstone towards a more sustainable future. Multiple waste heat recovery technologies are being investigated for low-temperature waste heat recovery. One of the technologies that is being considered for vehicle application is the Organic Rankine Cycle (ORC). In this paper, the potential of ORC is discussed in detail for hybrid vehicle application. The modelling and testing of multiple systems such as the hybrid vehicle, engine, and ORC waste heat recovery are performed using the computational approach in GT-SUITE software environment correlated against available engine data. It was found that the maximum cycle efficiency achieved from the ORC system was 5.4% with 2.02 kW of delivered power recovered from the waste heat available. This led to 1.0% and 1.2% of fuel economy improvement in the New European Driving Cycle (NEDC) and Worldwide Harmonised Light Vehicle Test Procedure (WLTP) driving cycle test, respectively. From the driving cycle analysis, Hybrid Electric Vehicles (HEV) and ORC are operative in a different part of the driving cycle. This is because the entire propulsion power is provided by the HEV system, resulting in less engine operation in some part of the cycle for the ORC system to function. Apart from that, a brief economic analysis of ORC Waste Heat Recovery (WHR) is also performed in this paper and a comparative analysis is carried out for different waste heat recovery technologies for hybrid vehicle application.

scholarly journals Thermoelectric Generation in Hybrid Electric Vehicles

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3742
Author(s):  
Muhamad Shazrul bin Dzulkfli ◽  
Apostolos Pesyridis ◽  
Dhrumil Gohil
Keyword(s):  
Heat Recovery ◽  
Hybrid Electric Vehicle ◽  
Waste Heat Recovery ◽  
Engine Speed ◽  
Waste Heat ◽  
Combustion Engine ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Waste Heat Recovery System ◽  
Hybrid Electric

Improving the efficiency of an internal combustion engine (ICE) leads to the reduction of fuel consumption, which improves the performance of a hybrid vehicle. Waste heat recovery (WHR) systems offer options to improve the efficiency of an ICE. This is due to the ICE releasing approximately one third of the combustion energy as waste heat into the atmosphere. This paper focuses on one such upcoming system by analysing the efficiency of a thermoelectric generator (TEG) used as a waste heat recovery system in a hybrid electric vehicle (HEV). It summarises how the efficiency of the TEG can be improved by considering parameters such as the size of module, materials used, and the number of modules needed for the TEG system. The results obtained are then compared with other types of WHR system such as the Organic Rankine Cycle (ORC) and turbocompounding (T/C) implemented on the same type of engine. The research is based on a 1.8 L Toyota Prius-type engine. The TEG model simulated in this research can generate a maximum power of 1015 W at an engine speed of 5200 RPM. The overall system efficiency of TEG implemented on the HEV model is 6% with the average engine speed operating at 2000 RPM.

Brayton cycles as waste heat recovery systems on series hybrid electric vehicles

2018 ◽  
Vol 168 ◽  
pp. 200-214 ◽  
Author(s):  
Wissam Bou Nader ◽  
Charbel Mansour ◽  
Clément Dumand ◽  
Maroun Nemer
Keyword(s):  
Electric Vehicles ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Hybrid Electric Vehicles ◽  
Waste Heat ◽  
Hybrid Electric

scholarly journals Component-Oriented Modeling of a Micro-Scale Organic Rankine Cycle System for Waste Heat Recovery Applications

2021 ◽  
Vol 11 (5) ◽  
pp. 1984
Author(s):  
Ramin Moradi ◽  
Emanuele Habib ◽  
Enrico Bocci ◽  
Luca Cioccolanti
Keyword(s):  
Electric Power ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Operating Conditions ◽  
Working Fluid ◽  
Pump Efficiency ◽  
Micro Scale

Organic Rankine cycle (ORC) systems are some of the most suitable technologies to produce electricity from low-temperature waste heat. In this study, a non-regenerative, micro-scale ORC system was tested in off-design conditions using R134a as the working fluid. The experimental data were then used to tune the semi-empirical models of the main components of the system. Eventually, the models were used in a component-oriented system solver to map the system electric performance at varying operating conditions. The analysis highlighted the non-negligible impact of the plunger pump on the system performance Indeed, the experimental results showed that the low pump efficiency in the investigated operating range can lead to negative net electric power in some working conditions. For most data points, the expander and the pump isentropic efficiencies are found in the approximate ranges of 35% to 55% and 17% to 34%, respectively. Furthermore, the maximum net electric power was about 200 W with a net electric efficiency of about 1.2%, thus also stressing the importance of a proper selection of the pump for waste heat recovery applications.

scholarly journals Biogas Engine Waste Heat Recovery Using Organic Rankine Cycle

Energies ◽  
2017 ◽  
Vol 10 (3) ◽  
pp. 327 ◽  
Author(s):  
Alberto Benato ◽  
Alarico Macor
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle
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