Hnyp M. Increase in the energy efficiency of mobile diesel compressor stations in petrolium industry

The thesis is devoted to increase of energy efficiency of mobile diesel compressor stations of oil and gas industry by development of advanced technical solutions and methods of energy saving of compressors due to additional cooling, usage of exhaust heat and compressed gases, and usage of alternative gas fuels for power drives. Mathematical model of energy efficiency of various circuits of the compressed gas cooling system of compressor stations was performed in order to establish analytical dependences of energy consumption on the change of thermodynamic and structural parameters of compressors. Stand experimental investigations of energy and operational parameters of mobile diesel compressor stations converted to alternative gas fuels were carried out in order to verify the correctness of mathematical model and to establish the relationship between their economic, power, and environmental characteristics. It is established that using the developed systems of compressed gas cooling the specific energy consumed by compressors is reduced by 14-17 % for diesel compressor installations of the oil and gas industry. Usage for cooling of compressed gas additional Freon systems of high-efficiency cooling leads to reducing of heat exchangers area of compressed gas coolers on average, by 25 %. Usage of additional Freon systems of high-efficiency cooling instead of water systems allows to reduce 2-3 times the specific consumption of the coolant-coolant by one kilogram of cooled gas. It was found that the effective engine power using pure propane-butane instead of diesel fuel increased by 5,2 %; the maximum effective engine power when using a mixture of 95% propane-butane and 5 % pyrolysis gas increased by 2,3 %; the amount of effective specific fuel consumption of the engine at maximum power using pure propane-butane instead of diesel fuel decreased by 5,9 %; the effective unit specific fuel consumption of 95 % propane-butane and 5 % pyrolysis gas was reduced by 2,1 %.