Small-scale geothermal power plant field verification projects

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620 KUT s

Invesment cost for geothermal power plants

Stepwise development strategy is considered a suitable method for securing a cost-effective way for the development of geothermal power plants. This strategy has been in use in Iceland for the last decade. Geothermal high-temperature fields are developed in steps of 20–30 MW. About 6 years are required for each step in the development. Parallel development of several fields in a country might…

Geothermal power plants at Mt. Amiata (Tuscany-Italy): mercury and hydrogen s…

At Mt. Amiata (Italy) geothermal energy is used, since 1969, to generate electricity in five plants with a nominal capacity of 88 MW. Anomalous levels of mercury characterise geothermal fluids of Mt. Amiata, an area renowned for its vast cinnabar deposits and for the mercury production carried out in the past. Mercury emission rates range from 300 to 400 g/h, or 3–4 g/h per MW electrical inst…

CO2 emissions from geothermal power plants and natural geothermal activity in…

The ratio of CO2 emissions from power plants to natural emissions is a measure of the environmental impact associated with geothermal power production. Emissions from Icelandic geothermal power plants amounted to 1.6 × 108 kg year−1 in 2002. Two independent estimates of natural CO2 emissions range between 1 × 108 and 2 × 109 kg year−1. Thus, power plant emissions are significant compared…

Neustadt-glewe geothermal power plant-practical experience in the reinjection…

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620 SEI n

Environmental impact assessment of sabalan geothermal power plant, NW Iran

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620 YOU e

Assessment of evaporative cooling enhancement methods for air-cooled geotherm…

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620 KUT a

Working fluids for low-temperature organic rankine cycles

A thermodynamic screening of 31 pure component working fluids for organic Rankine cycles (ORC) is given using BACKONE equation of state. The fluids are alkanes, fluorinated alkanes, ethers and fluorinated ethers. The ORC cycles operate between 100 and 30 °C typical for geothermal power plants at pressures mostly limited to 20 bar, but in some cases supercritical pressures are also considered. …

Second law assessment of binary plants generating power from low-temperature …

Binary-type energy conversion systems are typically used to exploit low-temperature geothermal resources. There are many different technical variations of binary plants, including those known as Organic Rankine Cycles (ORC) and proprietary systems known as Kalina cycles. Recent articles in the technical literature claim dramatic efficiency advantages for Kalina cycles over ORCs, thereby providi…

Thermodynamic evaluation of denizli kizil dere geothermal power plant and its…

A thermodynamic optimization of the Denizli Kızıldere power plant is performed using real data, and some important results are obtained. The optimum flashing pressure is found to be 200 kPa. According to the existing geothermal power plant, 18% power augmentation is provided when the plant operates at this state. In addition, a new flash-binary model is proposed, and the optimum operating pre…