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Abstract - In this study, a controller was designed for temperature control. This paper propose to analyse the temperature value in geothermal power station and control it. The results are obtained by simulating a Simulink model.
Keywords: temperature control; design controller; Simulink simulation; Simulink model.
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I. INTRODUCTION
Geothermal energy is a proven resource for direct heat and power generation. In over 30 countries geothermal resources provide directly used heat capacity of 12,000 MW and electric power generation capacity of over 8,000 MW. It meets a significant portion of the electrical power demand in several developing countries. For example, in the Philippines geothermal provides 27% of that country's total electrical generation, from power plant complexes as large as 700 MW.
Individual geothermal power plants can be as small as 100 kW or as large as 100 MW depending on the energy resource and power demand. The technology is suitable for rural electrification and mini-grid applications in addition to national grid applications. Direct use of geothermal heat can boost agricultural and aqua-culture production in colder climates and supply heat for industrial processes that can add value to local primary products. Heat pumps are the fastest-growing means of exploiting geothermal energy, with a global annual growth rate of 30% in energy production [1].
Geothermal resources may be especially important and significant in developing nations where no indigeneous fossil fuel resources exist such as oil, coal or natural gas. For example in Tibet, where no readily available fossil fuels exist, the Nagqu geothermal field (Tibet Autonomous Region, PRC) provides a useful energy source for the local population. With the help of the UN, a 1 MWe binary plant was built in 1993.
Geothermal means "Heat from the Earth". The heat that flows from the Earth's hot interior due to crustal plate movements, zones of high heat flow may be located close to the surface where convective circulation plays a signifcant role in bringing the heat close to the surface.
Deep circulation of groundwater along fracture zones will bring heat to shallower levels, collecting the heatflow from a broad area and concentrating it into shallow reservoirs or discharging as hot springs.
These reservoirs may contain hot water and/or stream. By drilling into these reservoirs,...