TY - GEN
T1 - Comparative study of water-steam- and organic-rankine-cycles as bottoming cycles for heavy-duty diesel engines by means of exergetic and economic analysis
AU - Gewald, Daniela
AU - Schuster, Andreas
AU - Spliethoff, Hartmut
AU - König, Nikolaus
PY - 2010
Y1 - 2010
N2 - Heavy-duty Diesel engines are used for the production of electric energy in different applications, e.g. as IPPs in island networks or as net integrated power plants. Diesel engines are also able to run on different fuels such as heavy fuel oil, diesel oil, natural gas, biogas and biofuels. To increase the thermodynamic efficiency of Diesel engine power plants, different bottoming cycles can be applied to the engine cycle in a combined power plant. This paper presents a comparative study of the water-steam and the Organic-Rankine-cycle (ORC) as bottoming processes. Water-steam cycles are commonly used for power production units from 2 MW and larger, while ORC modules are commercially available up to 2 MW. According to this fact, criteria are necessary for the decision between water-steam- and Organic-Rankine-cycles with respect to the boundary conditions for the operation of a combined-cycle engine power plant. For the variable cases of Diesel engine applications and variable fuels, optimal working parameters for the tradeoff between additional power generation and additional investment costs are calculated for the steam- and the ORC-process, respectively. Concerning the ORC, calculations with two different state of the art working fluids (R245fa, pentane) are conducted. All calculations are done by means of a software for thermodynamic cycle simulations (Ebsilon Professional) with a detailed modeling of the components. The two bottoming cycles are compared by their energetic and exergetic efficiency and their specific costs for installation, operation and electricity production respectively, in order to derive decision criteria for the installation of water-steam- or Organic-Rankine-cycles.
AB - Heavy-duty Diesel engines are used for the production of electric energy in different applications, e.g. as IPPs in island networks or as net integrated power plants. Diesel engines are also able to run on different fuels such as heavy fuel oil, diesel oil, natural gas, biogas and biofuels. To increase the thermodynamic efficiency of Diesel engine power plants, different bottoming cycles can be applied to the engine cycle in a combined power plant. This paper presents a comparative study of the water-steam and the Organic-Rankine-cycle (ORC) as bottoming processes. Water-steam cycles are commonly used for power production units from 2 MW and larger, while ORC modules are commercially available up to 2 MW. According to this fact, criteria are necessary for the decision between water-steam- and Organic-Rankine-cycles with respect to the boundary conditions for the operation of a combined-cycle engine power plant. For the variable cases of Diesel engine applications and variable fuels, optimal working parameters for the tradeoff between additional power generation and additional investment costs are calculated for the steam- and the ORC-process, respectively. Concerning the ORC, calculations with two different state of the art working fluids (R245fa, pentane) are conducted. All calculations are done by means of a software for thermodynamic cycle simulations (Ebsilon Professional) with a detailed modeling of the components. The two bottoming cycles are compared by their energetic and exergetic efficiency and their specific costs for installation, operation and electricity production respectively, in order to derive decision criteria for the installation of water-steam- or Organic-Rankine-cycles.
KW - Clausius rankine cycle
KW - Combined cycle
KW - Internal combustion engine
KW - Organic rankine cycle
UR - http://www.scopus.com/inward/record.url?scp=84896093209&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84896093209
SN - 9781456303204
T3 - Proceedings of the 23rd International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems, ECOS 2010
SP - 63
EP - 71
BT - Fuel Cell and Internal Combustion Engines
PB - Aabo Akademi University
T2 - 23rd International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems, ECOS 2010
Y2 - 14 June 2010 through 17 June 2010
ER -