Prediction of knock limited operating conditions of a natural gas engine

Thermal modeling and operating tests for the gas engine-driven heat pump systems

“…Regarding using a gas engine in GEHP, there are models which use standard air assumption Otto cycle for predicting combustion, power output and efficiency of internal combustion gas engine [17,18]. There is also more detailed approaches in which the combustion process and the cycle heat input were depend on the crank angle, combustion duration, spark advanced, as well as the amounts of heat and mass losses [19].…”

Effect of the Miller cycle on the performance of turbocharged hydrogen internal combustion engines

“…5 shows the changes in the pressure at the end of the compression stroke with the IVC and inlet pressure. To avoid the knock [25], 3.5 MPa is set as the limitation in this study. Fig.…”

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

“…Since is only desired average values or values from mass and energy balances of simplified engine sub-systems [12, 13], this to facilitate future engine control and observation applications [14, 15] in real time. In the development of the mathematical description of the engine, more opts for MVEM [23, 24, 25, 26, 27, 28, 29], this type of modeling does not present high complexity compared to those of cylinder per cylinder, however, allow to obtain results of the macroscopic behavior of the engine, and its component [3, 12, 16] and [17]. Hendricks, in 1990 [12], developed an MVEM in an ICE by provoked ignition, with energy balances based on classical thermodynamics, very similar to what is normally implemented today.…”

“…Soylu et al. [25] used a two-zone thermodynamic model with zero dimensions to determine the operating conditions restricted by the cylinders of an ICE. This work is related by the type of area covered by the research; in addition, it shows a model that offers the possibility to select the operational parameters according to the working conditions which provides a crucial tool in the design of natural gas engines.…”