Analysis of the Stirling engine in the Schmidt approximation

Abstract

Exploration, oil and gas well development, and oil and gas production facilities are often located in remote, remote locations away from electrical networks and highways. Autonomous power supply of these facilities is currently carried out by means of diesel power plants, which is associated with the necessary supply of fuel and associated high overhead costs. In this regard, the use of renewable energy sources (RES) is of particular relevance. As such, wind energy, geothermal heat, solar radiation energy, associated petroleum gas energy are known. The same group should include local energy sources such as peat, wood, coal, coal shale, etc.with the exception of the first of these sources, the rest require the conversion of thermal energy into mechanical energy, and then, by means of an electric generator into electrical energy. The only known universal Converter is the Stirling generator-a machine in which the generator is combined with the Stirling engine. Stirling engine (DS) – refers to external combustion engines, more precisely external heat supply. For the operation of the DS, it is only required to bring the temperature difference to its heat exchangers, and both the increased temperature of the heater and the reduced temperature of the refrigerator are important. As a heater, you can use the heat of the burner, steam or water heated in geothermal or solar collectors. It is possible to supply directly solar energy from solar concentrators. For these cases, a special design of the DS with a quartz head is provided, through which concentrated solar radiation enters directly into the expansion chamber. Geothermal water supplied directly from the well or associated petroleum gas, which can be highly corrosive, can also be used for these engines. As a refrigerator, you can use the environment, chilled water, ice or snow. DS works in a closed cycle, which allows you to completely seal the body and use helium or hydrogen as a working fluid. This ensures high working fluid pressure, which increases the specific power (power per unit volume or weight of the engine). Currently, these engines have not received mass application, which is explained by both economic reasons (high cost of development, competition from the ice) and commercial (patent restrictions, trade secrets).