Modeling the power-economic characteristic of diesel-steam combined cycle in the whole spectrum of operating conditions

Stanislav Danov, Tsuyoshi Yamamoto, Norio Arai

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A mathematical model of energy conversion processes in a combined diesel-steam power plant has been developed. The investigated power plant consists of a turbocharged diesel engine and a steam turbine. The steam turbine is arranged as a heat recovery system utilizing the exhaust gas heat from the diesel engine. The mutual work of the diesel engine as a source of heat, and the system for utilization, as a consumer of heat, has been investigated in the whole spectrum of operating conditions in terms of the engine speed and load. The mathematical model describes the processes taking place simultaneously in the diesel engine cylinders, turboharger, air filter, air inlet pipes, exhaust pipes, exhaust gas boiler, steam turbine and the related auxiliary elements. The model includes non-linear differential equations, expressing the energy and mass conservation equations for modeling the processes in the diesel engine cylinders, fuel combustion rate both for premixed and diffusion flames, the gas exchange process, power balance in the turbocharger, matching the instantaneous characteristics of the turbocharger with the piston part of the engine, energy balance in the inlet pipes and exhaust system, heat balance in the exhaust gas boiler, utilization gas turbine, etc. The fifth-order Kuta-Merson method has been applied for solving these simultaneous equations. The model gives an opportunity to investigate the behavior of this combined power plant with respect to the major integral parameters, like mean indicated pressure, specific fuel consumption, hourly fuel consumption, brake power of the main diesel engine, parameters (mass flow rate, pressure, temperature) of gases and air respectively through the gas turbine and compressor (in the frame of turbocharger), exhaust gas temperatures at boiler inlet and outlet, exhaust gases mass flow rate through the boiler, parameters of superheated steam (temperature, pressure, enthalpy), steam production in terms of mass flow rate, etc. As a result, the universal power-economic characteristics for the whole spectrum of operating conditions have been created, which can be used for solving optimization problems.

Original languageEnglish
Pages (from-to)275-285
Number of pages11
JournalAmerican Society of Mechanical Engineers, Fuels and Combustion Technologies Division (Publication) FACT
Volume22
Publication statusPublished - Dec 1 1998

Fingerprint

diesel engine
diesel
Diesel engines
Exhaust gases
Steam
turbine
Economics
Boilers
Steam turbines
economics
modeling
power plant
pipe
Pipe
Flow rate
fuel consumption
Engine cylinders
Fuel consumption
Gas turbines
Diesel power plants

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

@article{4fa0b2fe5a1b4366a534993bf025d091,
title = "Modeling the power-economic characteristic of diesel-steam combined cycle in the whole spectrum of operating conditions",
abstract = "A mathematical model of energy conversion processes in a combined diesel-steam power plant has been developed. The investigated power plant consists of a turbocharged diesel engine and a steam turbine. The steam turbine is arranged as a heat recovery system utilizing the exhaust gas heat from the diesel engine. The mutual work of the diesel engine as a source of heat, and the system for utilization, as a consumer of heat, has been investigated in the whole spectrum of operating conditions in terms of the engine speed and load. The mathematical model describes the processes taking place simultaneously in the diesel engine cylinders, turboharger, air filter, air inlet pipes, exhaust pipes, exhaust gas boiler, steam turbine and the related auxiliary elements. The model includes non-linear differential equations, expressing the energy and mass conservation equations for modeling the processes in the diesel engine cylinders, fuel combustion rate both for premixed and diffusion flames, the gas exchange process, power balance in the turbocharger, matching the instantaneous characteristics of the turbocharger with the piston part of the engine, energy balance in the inlet pipes and exhaust system, heat balance in the exhaust gas boiler, utilization gas turbine, etc. The fifth-order Kuta-Merson method has been applied for solving these simultaneous equations. The model gives an opportunity to investigate the behavior of this combined power plant with respect to the major integral parameters, like mean indicated pressure, specific fuel consumption, hourly fuel consumption, brake power of the main diesel engine, parameters (mass flow rate, pressure, temperature) of gases and air respectively through the gas turbine and compressor (in the frame of turbocharger), exhaust gas temperatures at boiler inlet and outlet, exhaust gases mass flow rate through the boiler, parameters of superheated steam (temperature, pressure, enthalpy), steam production in terms of mass flow rate, etc. As a result, the universal power-economic characteristics for the whole spectrum of operating conditions have been created, which can be used for solving optimization problems.",
author = "Stanislav Danov and Tsuyoshi Yamamoto and Norio Arai",
year = "1998",
month = "12",
day = "1",
language = "English",
volume = "22",
pages = "275--285",
journal = "American Society of Mechanical Engineers, Fuels and Combustion Technologies Division (Publication) FACT",
issn = "1066-503X",
publisher = "American Society of Mechanical Engineers(ASME)",

}

TY - JOUR

T1 - Modeling the power-economic characteristic of diesel-steam combined cycle in the whole spectrum of operating conditions

AU - Danov, Stanislav

AU - Yamamoto, Tsuyoshi

AU - Arai, Norio

PY - 1998/12/1

Y1 - 1998/12/1

N2 - A mathematical model of energy conversion processes in a combined diesel-steam power plant has been developed. The investigated power plant consists of a turbocharged diesel engine and a steam turbine. The steam turbine is arranged as a heat recovery system utilizing the exhaust gas heat from the diesel engine. The mutual work of the diesel engine as a source of heat, and the system for utilization, as a consumer of heat, has been investigated in the whole spectrum of operating conditions in terms of the engine speed and load. The mathematical model describes the processes taking place simultaneously in the diesel engine cylinders, turboharger, air filter, air inlet pipes, exhaust pipes, exhaust gas boiler, steam turbine and the related auxiliary elements. The model includes non-linear differential equations, expressing the energy and mass conservation equations for modeling the processes in the diesel engine cylinders, fuel combustion rate both for premixed and diffusion flames, the gas exchange process, power balance in the turbocharger, matching the instantaneous characteristics of the turbocharger with the piston part of the engine, energy balance in the inlet pipes and exhaust system, heat balance in the exhaust gas boiler, utilization gas turbine, etc. The fifth-order Kuta-Merson method has been applied for solving these simultaneous equations. The model gives an opportunity to investigate the behavior of this combined power plant with respect to the major integral parameters, like mean indicated pressure, specific fuel consumption, hourly fuel consumption, brake power of the main diesel engine, parameters (mass flow rate, pressure, temperature) of gases and air respectively through the gas turbine and compressor (in the frame of turbocharger), exhaust gas temperatures at boiler inlet and outlet, exhaust gases mass flow rate through the boiler, parameters of superheated steam (temperature, pressure, enthalpy), steam production in terms of mass flow rate, etc. As a result, the universal power-economic characteristics for the whole spectrum of operating conditions have been created, which can be used for solving optimization problems.

AB - A mathematical model of energy conversion processes in a combined diesel-steam power plant has been developed. The investigated power plant consists of a turbocharged diesel engine and a steam turbine. The steam turbine is arranged as a heat recovery system utilizing the exhaust gas heat from the diesel engine. The mutual work of the diesel engine as a source of heat, and the system for utilization, as a consumer of heat, has been investigated in the whole spectrum of operating conditions in terms of the engine speed and load. The mathematical model describes the processes taking place simultaneously in the diesel engine cylinders, turboharger, air filter, air inlet pipes, exhaust pipes, exhaust gas boiler, steam turbine and the related auxiliary elements. The model includes non-linear differential equations, expressing the energy and mass conservation equations for modeling the processes in the diesel engine cylinders, fuel combustion rate both for premixed and diffusion flames, the gas exchange process, power balance in the turbocharger, matching the instantaneous characteristics of the turbocharger with the piston part of the engine, energy balance in the inlet pipes and exhaust system, heat balance in the exhaust gas boiler, utilization gas turbine, etc. The fifth-order Kuta-Merson method has been applied for solving these simultaneous equations. The model gives an opportunity to investigate the behavior of this combined power plant with respect to the major integral parameters, like mean indicated pressure, specific fuel consumption, hourly fuel consumption, brake power of the main diesel engine, parameters (mass flow rate, pressure, temperature) of gases and air respectively through the gas turbine and compressor (in the frame of turbocharger), exhaust gas temperatures at boiler inlet and outlet, exhaust gases mass flow rate through the boiler, parameters of superheated steam (temperature, pressure, enthalpy), steam production in terms of mass flow rate, etc. As a result, the universal power-economic characteristics for the whole spectrum of operating conditions have been created, which can be used for solving optimization problems.

UR - http://www.scopus.com/inward/record.url?scp=1642293535&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1642293535&partnerID=8YFLogxK

M3 - Article

VL - 22

SP - 275

EP - 285

JO - American Society of Mechanical Engineers, Fuels and Combustion Technologies Division (Publication) FACT

JF - American Society of Mechanical Engineers, Fuels and Combustion Technologies Division (Publication) FACT

SN - 1066-503X

ER -