Waste heat utilization from internal combustion engines for power augmentation and refrigeration

2021 ◽  
Vol 152 ◽  
pp. 111629
Author(s):  
A.M. Alklaibi ◽  
N. Lior
Keyword(s):  
Internal Combustion Engines ◽  
Waste Heat ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Heat Utilization ◽  
Waste Heat Utilization

scholarly journals A Waste Heat-Driven Cooling System Based on Combined Organic Rankine and Vapour Compression Refrigeration Cycles

2019 ◽  
Vol 9 (20) ◽  
pp. 4242 ◽  
Author(s):  
Youcai Liang ◽  
Zhibin Yu ◽  
Wenguang Li
Keyword(s):  
Power Plant ◽  
Internal Combustion Engines ◽  
Waste Heat ◽  
Cooling System ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Compression Cycle ◽  
Vapour Compression

In this paper, a heat driven cooling system that essentially integrated an organic Rankine cycle power plant with a vapour compression cycle refrigerator was investigated, aiming to provide an alternative to absorption refrigeration systems. The organic Rankine cycle (ORC) subsystem recovered energy from the exhaust gases of internal combustion engines to produce mechanical power. Through a transmission unit, the produced mechanical power was directly used to drive the compressor of the vapour compression cycle system to produce a refrigeration effect. Unlike the bulky vapour absorption cooling system, both the ORC power plant and vapour compression refrigerator could be scaled down to a few kilowatts, opening the possibility for developing a small-scale waste heat-driven cooling system that can be widely applied for waste heat recovery from large internal combustion engines of refrigerated ships, lorries, and trains. In this paper, a model was firstly established to simulate the proposed concept, on the basis of which it was optimized to identify the optimum operation condition. The results showed that the proposed concept is very promising for the development of heat-driven cooling systems for recovering waste heat from internal combustion engines’ exhaust gas.

Design and Operation of a Hybrid CCHP System Including PV-Wind Devices

2013 ◽  
Author(s):  
J. L. Wang ◽  
J. Y. Wu ◽  
C. Y. Zheng
Keyword(s):  
Fuel Consumption ◽  
Internal Combustion Engines ◽  
High Efficiency ◽  
Waste Heat ◽  
Internal Combustion ◽  
Energy System ◽  
Optimal Operation ◽  
Combustion Engines ◽  
Wind System ◽  
Fuel Price

CCHP systems based on internal combustion engines have been widely accepted as efficient distributed energy resources systems. CCHP systems can be efficient mainly because that the waste heat of engines can be recovered and used. If the waste heat is not used, CCHP systems may not be beneficial choices. PV-wind systems can generate electricity without fuel consumption, but the electric output depends on the weather, which is not reliable. A PV-wind system can be integrated into a CCHP system to form a higher efficient energy system. Actually, a hybrid energy system based on PV-wind devices and internal combustion engines has been studied by many researchers. But the waste heat of the engine is seldom considered in the previous work. Researches show that, 20∼30% energy can be converted into electricity by a small size engine while more than 70% is released. If the waste heat is not recovered, the system cannot reach a high efficiency. This work aims to analyze a hybrid CCHP system with PV-wind devices. Internal combustion engines are the prime movers whose waste heat is recovered for house heating or driving absorption chillers. PV-wind devices are added to reduce the fuel consumption and total cost. The optimal design method and optimal operation strategy are proposed basing on hourly analyses. Influences of the device cost and fuel price on the optimal dispatch strategies are discussed. Results show that all of the excess energy from the PV-wind system is not worth being stored by the battery. The hybrid CCHP system can be more economical and higher efficient in the studied case.

Waste Heat Recovery From Internal Combustion Engines: Feasibility Study on an Organic Rankine Cycle With Application to the Ohio State EcoCAR PHEV

2012 ◽  
Author(s):  
Philipp Skarke ◽  
Shawn Midlam-Mohler ◽  
Marcello Canova
Keyword(s):  
Heat Recovery ◽  
Hybrid Electric Vehicle ◽  
Waste Heat Recovery ◽  
Internal Combustion Engines ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Driving Conditions

This paper presents a feasibility analysis on the application of Organic Rankine Cycles as a Waste Heat Recovery system for automotive internal combustion engines. The analysis is conducted considering the Ohio State University EcoCAR, a student prototype plug-in hybrid electric vehicle, as a case study for preliminary fuel economy evaluation. Starting from a energy-based powertrain simulation model validated on experimental data from the prototype vehicle, a first and second-law analysis was conducted to identify the potential for engine waste heat recovery, considering a variety of driving cycles and assuming the vehicle operating in charge-sustaining (HEV) mode. Then, a quasi-static thermodynamic model of an Organic Rankine Cycle (ORC) was designed, calibrated from data available in literature and optimized to fit the prototype vehicle. Simulations were then carried out to evaluate the amount of energy recovered by the ORC system, considering both urban and highway driving conditions. The results of the simulations show that a simple ORC system is able to recover up to 10% of the engine waste heat on highway driving conditions, corresponding to a potential 7% improvement in fuel consumption, with low penalization of the added weight to the vehicle electric range.

An experimental investigation of exhaust waste heat recycling by thermoelectric generators under different thermal conditions for internal combustion engines

2017 ◽  
Vol 232 (12) ◽  
pp. 1648-1653 ◽  
Author(s):  
M Akif Kunt
Keyword(s):  
Internal Combustion Engines ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Thermal Conditions ◽  
Internal Combustion ◽  
Load Resistance ◽  
Heating Process ◽  
Combustion Engines ◽  
Exhaust Waste Heat ◽  
Exhaust Systems

Almost 70% of heat power produced by pistons in internal combustion engines is lost due to exhaust and cooling. In the course of the heating process, 25% of useful energy transfers to the exit shaft. There have been a lot of studies on recycling waste heat of internal combustion engines, especially on cooling and exhaust systems. A thermoelectric generator is an important way to recycle waste energy in exhaust systems of internal combustion engines. In this study, an air-cooled thermoelectric generator was designed to recycle waste heat energy in exhaust systems of internal combustion engines and its performance was tested. Waste heat recycling tests were conducted by measuring voltage, current, and power values under different thermal conditions depending on the change in load resistance. The results obtained were compared with the results of analyses and experiments. Maximum voltage value at RI = 45Ω load resistance was obtained as 11.03 V (experiment) and 11.22 V (analysis), and maximum current value at RI = 5Ω load resistance as 0.42 A (experiment) at Th = 250°C, Δ T = 40°C.

A Study on Generating Electricity by Using Exhaust Waste Heat in a Diesel Engine

2013 ◽  
Vol 446-447 ◽  
pp. 858-862
Author(s):  
Hasan Aydogan ◽  
A. Engin Ozcelik ◽  
Mustafa Acaroglu ◽  
Hakan Işik
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engines ◽  
Waste Heat ◽  
Mechanical Energy ◽  
Exhaust System ◽  
Internal Combustion ◽  
Heat Energy ◽  
Combustion Engines ◽  
Exhaust Temperature ◽  
Exhaust Waste Heat

Internal combustion engines are widely used in our day. Internal combustion engines first transform fuel energy into heat energy. Afterwards, approximately 30% of this heat energy is transformed into mechanical energy. Approximately 5% of the heat energy is expelled through friction and radiation, 30% through cooling and 35% through the exhaust system. In the present study, electricity was generated by using thermoelectric equipment and the waste heat expelled from the exhaust system. It was observed that as the exhaust temperature increased, the amount of electricity generated also increased.

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