TY JOUR TI CHOOSING THE TYPE OF GAS PISTON INSTALLATIONS FOR HEAT AND GAS SUPPLY IN RUSSIA KW gas piston engine KW cogeneration KW two-stroke KW pre-chamber KW spark ignition KW heat recovery JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Bulanin, V.A. PY 2020 IS 5 PB Belgorod State Technological University named after V.G. Shukhov