Open AccessStudy concerning the thermal energy balance in an internal combustion engine
Author(s) -
Rareș-Mihăiță Popa,
A T Borborean,
Virgil Stoica,
Ioana Ionel
Publication year - 2022
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/960/1/012012
Subject(s) - internal combustion engine cooling , stirling engine , internal combustion engine , exhaust gas , thermodynamics , energy balance , cylinder , heat engine , external combustion engine , combustion , exhaust gas recirculation , materials science , environmental science , mechanics , combustion chamber , mechanical engineering , chemistry , engineering , physics , organic chemistry
In this scientific report the steps for achieving the energy balance on a test engine Daewoo 1.6 liter in 4 cylinders, with 4 valves per cylinder, its power being77 kW, are presented. The engine was connected to a hydraulic brake during the tests. The energy balance was established, based on measurements applied on the stand test, focusing to determine the lost heat and to conceive a Sankey diagram, accordingly. Two sets of measurements were performed and based on them the heat losses were determined and two Sankey diagrams were depicted. The lost heat through the cooling fluid is determined by measuring the cooling water flow rate and its inlet and outlet temperature. The lost heat through the exhaust gases is determined by the difference between the enthalpy of the exhaust gases and the enthalpy of fresh air. The lost heat due to incomplete chemical combustion is determined by analyzing the composition of the exhaust gases. The measurements are centralized on a graphic user interface, supported by a NI Compact RIO platform.