Utilization of heat and power complex with a capacity of 1 MW

Abstract

The results of a compact and mobile heat recovery plant design based on the organic Rankine cycle (ORC) with a capacity of 1 MW, which can meet the gas pumping station auxiliaries in power, are presented. The choice of n-pentane as a working fluid, as the cheapest and most affordable on the market and providing condensation of exhaust steam at the atmospheric pressure, and thermal oil ‘Thermolan LT’ as an intermediate heat carrier has been substantiated. The choice of the work process parameters is focused on reliable long-term work with a minimum amount of maintenance. The plant is designed with the possibility to place its main units outside the technological zone of the main production. The design of the plant main components is presented. The turbine is axial, with five stages with a direct generator drive without a reduction gear. The turbine and generator are placed in a ventilated container. The steam generator is a vertically placed shell-and-tube heat exchanger. The air condenser is with horizontally arranged heat exchange tubes and screw-knurled fins. The recuperator is a shell-and-tube heat exchanger with horizontally arranged longitudinally finned tubes. It has been substantiated that for low-potential heat sources and in the conditions of low air temperatures, the use of heat-recovery plants based on the ORC is the optimal solution.