TY - JOUR

T1 - A phenomenological base semi-physical thermodynamic model for the cylinder and exhaust manifold of a natural gas 2-megawatt four-stroke internal combustion engine

AU - Ochoa, Guillermo Valencia

AU - Isaza-Roldan, Cesar

AU - Forero, Jorge Duarte

N1 - Publisher Copyright:
© 2019 The Author(s)

PY - 2019/10

Y1 - 2019/10

N2 - This paper presents the application of a systematic methodology to obtain a semi-physical model of phenomenological base for a 2 MW internal combustion engine to generate electric power operating with natural gas, as a function of the average thermodynamic value normally measured in industrial applications. Specifically, the application of the methodology is focused on the cylinders, exhaust manifold, and turbocharger turbine sections. The proposed model was validated with actual operating data, obtaining an error rate not exceeding 5%, which allow a thermal characterization of the Jenbacher JMS 612 GS-N based on the model. A parametric analysis is conducted; considering the volumetric efficiency, the output electric power, the effective efficiency, the exhaust gas temperature, the turbine mass flow, the specific fuel consumption under the nominal operation conditions, which is 1.16 bar in the gas pressure, 65 °C in the cooling water temperature, 35 °C in the average ambient temperature, and 1500 rpm. The results of this model can be used to evaluate the thermodynamic performance parameters of waste heat recovery systems. On the other hand, new control strategies and the implementation of state observers for the detection and diagnosis of failures can be developed based on the proposed model. Applied mathematics; Mechanical engineering; Thermodynamics; Energy conservation; Mathematical modeling; Mean value model; Natural gas; Phenomenological base semi-physical model; Power generation; Spark ignition engine.

AB - This paper presents the application of a systematic methodology to obtain a semi-physical model of phenomenological base for a 2 MW internal combustion engine to generate electric power operating with natural gas, as a function of the average thermodynamic value normally measured in industrial applications. Specifically, the application of the methodology is focused on the cylinders, exhaust manifold, and turbocharger turbine sections. The proposed model was validated with actual operating data, obtaining an error rate not exceeding 5%, which allow a thermal characterization of the Jenbacher JMS 612 GS-N based on the model. A parametric analysis is conducted; considering the volumetric efficiency, the output electric power, the effective efficiency, the exhaust gas temperature, the turbine mass flow, the specific fuel consumption under the nominal operation conditions, which is 1.16 bar in the gas pressure, 65 °C in the cooling water temperature, 35 °C in the average ambient temperature, and 1500 rpm. The results of this model can be used to evaluate the thermodynamic performance parameters of waste heat recovery systems. On the other hand, new control strategies and the implementation of state observers for the detection and diagnosis of failures can be developed based on the proposed model. Applied mathematics; Mechanical engineering; Thermodynamics; Energy conservation; Mathematical modeling; Mean value model; Natural gas; Phenomenological base semi-physical model; Power generation; Spark ignition engine.

KW - Applied mathematics

KW - Energy conservation

KW - Mathematical modeling

KW - Mean value model

KW - Mechanical engineering

KW - Natural gas

KW - Phenomenological base semi-physical model

KW - Power generation

KW - Spark ignition engine

KW - Thermodynamics

UR - http://www.scopus.com/inward/record.url?scp=85073678288&partnerID=8YFLogxK

U2 - 10.1016/j.heliyon.2019.e02700

DO - 10.1016/j.heliyon.2019.e02700

M3 - Artículo

AN - SCOPUS:85073678288

SN - 2405-8440

VL - 5

JO - Heliyon

JF - Heliyon

IS - 10

M1 - e02700

ER -