Increasing electrical power output and fuel efficiency of gas engines in integrated energy system by absorption chiller scavenge air cooling on the base of monitoring data treatment

Abstract

An advanced scavenge air cooling system for reciprocating gas engines of integrated energy system for combined electricity, heat and refrigeration generation has been developed. New method of deep scavenge air cooling and stabilizing its temperature at increased ambient air temperatures and three-circuit scavenge air cooling system with absorption lithium-bromide chiller and wet-type cooling tower was proposed. Such cooling method does not require essential constructive changes in the existing scavenge air cooling system but only an addition heat exchanger for chilling scavenge air cooling water of scavenge air low-temperature intercooler closed contour by absorption chiller. A chilled water from absorption chiller is used as a coolant. To evaluate the effect of gas engine scavenge air deeper cooling compared with its typical radiator cooling, data on the dependence of fuel consumption and power output of gas engine on ambient air temperature at the inlet of the radiator are analized. The efficiency of engine scavenge air deep cooling at increased ambient air temperatures was estimated by reducing the gas fuel consumption compared with radiator cooling.

Monitoring the efficiency of cooling air at the inlet of gas engine in integrated energy system

“…The majority of concepts and approaches to enhancing the efficiency of IES focuse to application of cooling capacity generated in ACh for external consumers, for instance, for space conditioning and technological duties [38]. They do not reveal the reserves for improving the efficiency of cooling the cyclic air of engines themselves and enhancing the engine-generator technologies in the whole as result through using the generated cooling capacity within engine cycles [10,17].…”

“…A method for treating the monitoring data on fuel consumption depending on the air temperatures at the engine intake with regard to the influence of changes in engine loads was presented in [10,30]. That method is modified by using for treatment of monitoring data the correlations from the generalized methodology presented in [39].…”

“…A hot water is used as a heat source for absorption lithium-bromide chiller (ACh) [5,6] or adsorption chiller [7,8] to produce a cold in the form of chilled water. A cooling capacity of absorption chiller is spent for technological needs and for feeding to the central air conditioner for cooling the ambient air incoming the engine room, from where the air is sucked by the engine turbocharger (TC) [9,10]. The peculiarity of IES's that supply chilled water for food processing is its higher temperature of about 12 °С as compared with 7 °С typical for ACh.…”

Heat Recovery Systems for Agricultural Vehicles: Utilization Ways and Their Efficiency

“…Intake air is currently cooled with the WHRAR for stationary power plants. They provide a decrease in its temperature by 10-17 • C [59].…”

Research of the Aerothermopressor Cooling System of Charge Air of a Marine Internal Combustion Engine Under Variable Climatic Conditions of Operation

“…In this case, the turbocharger turbine uses almost the whole heat drop of ICE exhaust gases, that is, the turbine and compressor power are equal to each other N c = N t . It is possible to get additional work by reducing the compression operation and to unload the turbine [6]. This technology with jet pump technology has been used in plants for the combined production of energy and has made it possible to increase the efficiency of a power plant to 2% [7][8][9][10][11][12][13][14].…”