Assessment of the Performance and of the Profitability of CHP Energy Systems Fed by Vegetable Oils

2009 ◽  
Author(s):  
R. Bettocchi ◽  
M. Cadorin ◽  
M. Morini ◽  
M. Pinelli ◽  
P. R. Spina ◽  
...  
Keyword(s):  
Internal Combustion Engines ◽  
Organic Rankine Cycle ◽  
Energy Systems ◽  
Rankine Cycle ◽  
Internal Combustion ◽  
Primary Energy ◽  
Combined Cycle ◽  
Combustion Engines ◽  
Economic Analyses ◽  
The Cost

In this paper, energy and economic analyses of vegetable oil fed energy systems are presented. The paper focuses on the process from oil to energy, while the economic costs of the transformation process of the biomass from field to oil is assumed embodied in the cost of the oils. Five different oils are considered (sunflower, rapeseed, soybean, palm and waste fried oil) as fuels for cogenerative Internal Combustion Engines, also running in combined cycle configuration. In particular, the considered combined cycle is composed of Internal Combustion Engines and Organic Rankine Cycle modules. Energy analyses allow the evaluation of the installed power, of the produced energies, and of the primary energy saving index for different yearly oil mass values. The results of the economic analyses as a function of yearly oil mass are also presented. The cost sources are highlighted in order to point out the major contributors. Moreover, analyses of the limit value of incentive and oil price, in order to guarantee plant profitability, are carried out.

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.

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.

scholarly journals A comprehensive study on waste heat recovery from internal combustion engines using organic Rankine cycle

2013 ◽  
Vol 17 (2) ◽  
pp. 611-624 ◽  
Author(s):  
Mojtaba Tahani ◽  
Saeed Javan ◽  
Mojtaba Biglari
Keyword(s):  
Fuel Consumption ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Internal Combustion Engines ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Combustion Engines

There are a substantial amount of waste heat through exhaust gas and coolant of an Internal Combustion Engine. Organic Rankine cycle is one of the opportunities in Internal Combustion Engines waste heat recovery. In this study, two different configurations of Organic Rankine cycle with the capability of simultaneous waste heat recovery from exhaust gas and coolant of a 12L diesel engine were introduced: Preheat configuration and Two-stage. First, a parametric optimization process was performed for both configurations considering R-134a, R-123, and R-245fa as the cycle working fluids. The main objective in optimization process was maximization of the power generation and cycle thermal efficiency. Expander inlet pressure and preheating temperature were selected as design parameters. Finally, parameters like hybrid generated power and reduction of fuel consumption were studied for both configurations in different engine speeds and full engine load. It was observed that using R-123 as the working fluid, the best performance in both configurations was obtained and as a result the 11.73% and 13.56% reduction in fuel consumption for both preheat and Two-stage configurations were found respectively.

scholarly journals Development of an Organic Rankine Cycle system for exhaust energy recovery in internal combustion engines

2015 ◽  
Vol 655 ◽  
pp. 012015 ◽  
Author(s):  
Roberto Cipollone ◽  
Giuseppe Bianchi ◽  
Angelo Gualtieri ◽  
Davide Di Battista ◽  
Marco Mauriello ◽  
...  
Keyword(s):  
Energy Recovery ◽  
Internal Combustion Engines ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Cycle System ◽  
Exhaust Energy

scholarly journals 4E Analyses of a Hybrid Waste-Driven CHP–ORC Plant with Flue Gas Condensation

2020 ◽  
Vol 12 (22) ◽  
pp. 9449
Author(s):  
Hossein Nami ◽  
Amjad Anvari-Moghaddam ◽  
Ahmad Arabkoohsar ◽  
Amir Reza Razmi
Keyword(s):  
Power Plant ◽  
Environmental Effects ◽  
Flue Gas ◽  
Organic Rankine Cycle ◽  
Energy Systems ◽  
Rankine Cycle ◽  
Hybrid Plant ◽  
Gas Condensation ◽  
The Cost ◽  
Exergy Losses

The combination of a waste-driven hybrid heat and power plant with a small organic Rankine cycle unit was recently proposed and investigated from a thermodynamic perspective. The present study provides a more comprehensive assessment from system operation through considering the energy, exergy, exergoeconomic, and exergoenvironmental (4E) aspects in a revised design of this concept to obtain a bigger picture of the system’s technical, economic, and environmental effects on existing and future energy systems. The revised design includes a flue gas condensation unit and alternative friendly organic working fluids. For this, the hybrid plant is modeled for its thermal, economic, and environmental performances. Then, the exergy losses and environmental effects of the system are scrutinized, the cost of losses and pollutions are predicted, and lastly, sorts of solutions are introduced to improve the exergoeconomic and exergoenvironmental performances of the system. The results indicate that the highest share of exergy destruction relates to the incineration (equipped with a steam generator) with a levelized cost of approximately USD 71/h for a power plant with almost 3.3 megawatt electricity output capacity. The hybridization proposal with the flue gas condensation unit increases the sustainability index of the system from 1.264 to 1.28.

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