Many businesses are looking for direct electricity supply for themselves, this issue causes the structure of the electricity distribution network to gradually change, and small-scale power plants seem to be a suitable alternative for them. The need for reliable and available energy and the need to supply electricity in remote places has emphasized the role of electricity supply in the form of scattered production by natural gas. In recent years, commercial and industrial sites have started building power plants to supply electricity independently of the traditional distribution network, and the need for electricity in remote places and next to the consumer has led to an increase in the use of distributed generation power plants (small-scale power plants). ) has been These power plants with a production capacity of less than 100 megawatts in commercial and industrial centers can simultaneously produce electricity and heat (CHP).
Small-scale CHP plants, simultaneously producing thermal and electrical energy, can take many forms and include a wide range of technologies. In the operation of a typical power plant or generator, large amounts of heat are lost in the cooling circuits and in the exhaust gases. Using this waste heat for industrial processes or space heating increases the overall efficiency of the process.
CHP power plants generally produce heat, which is used for commercial industrial heating and cooling, and convert 75 to 80% of the fuel source into useful energy, the efficiency of the most modern CHP power plants is 90%. arrives Due to the proximity of the production site to the consumption site, CHP plants reduce network losses. CHP power plants produce electricity using internal combustion engines such as fuel cells, microturbines.
Internal combustion engine
An internal combustion engine is a heat engine in which the combustion of fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working process. In an internal combustion engine, the expansion of high-temperature, high-pressure gases produced by combustion exerts a direct force on certain engine components. This force is usually applied to pistons (piston engine), turbine blades (gas turbine), or nozzle (jet engine). This force propels the engine components over a distance, converting chemical energy into kinetic energy that is used to propel, move, or power whatever the engine is attached to.
Internal combustion engines are usually powered by fossil fuels such as natural gas or petroleum products such as gasoline, diesel fuel, or fuel oil. Renewable fuels such as biogas are also used in internal combustion engines. In the early 1900s, the inventor of the diesel engine, Rudolf Diesel, used peanut oil to run his engines. Hydrogen, which seems to provide the primary energy of many power plants in the future, currently, the appropriate technology for using this gas has not yet been achieved. However, natural gas plays a major role in internal combustion engines, largely due to its abundance and low production cost.
Performance of internal combustion engine in gas generator engine
An internal combustion engine has one or more cylinders in which the combustion process takes place and converts the energy released from the rapid burning of the fuel-air mixture into mechanical energy. Gas and diesel engines are the main types of internal combustion engines in small-scale power plants. Most internal combustion engines are efficient at converting burned fuel into usable energy. Their efficiency is measured in terms of “thermal efficiency” and among internal combustion engines, gas-burning engines have an average efficiency of up to 40% for generating electricity.
Barq News: Due to the growth of demand for electric energy in the next decade in the country and the inability of the government to respond to this demand, as well as the gradual increase in the maximum load of the country’s electricity network and its continuation in the coming years, the need for private sector investment in the field of electricity production It is strongly felt. The growth rate of electricity demand is expected to be between 8 and 9 percent in the coming years.This issue causes the market risk for investment to be reduced to the minimum possible and the Iranian electricity consumption market becomes a very reliable and continuous market for producers.
The high efficiency of gas-burning engines that are made with today’s technology and the lack of environmental pollution are among the strong reasons that encourage the local production of electricity using natural gas.Industrial towns can produce more electricity than their consumption and inject their surplus production at the level of 20 kV through 20 kV lines into the network during peak hours when the price of electricity is more expensive. In fact, sell this surplus production to the Ministry of Energy.
