7 products found
Geothermal Development Associates (GDA) Products
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Power
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Single Flash Geothermal Plant
For those geothermal resources with a temperature generally above 190ºC, a single-flash type of plant is often the best economic choice. Higher temperature reservoirs will typically produce both water and steam under natural pressure. This two-phase flow is usually directed to a separator that allows the steam fraction to be piped to the plant and the water fraction to be piped back into the reservoir via injection ...
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Double flash geothermal power plants
Resource conditions may allow consideration of a dual-flash plant. Substantially similar to a single-flash plant, a dual-flash plant is capable of utilizing more of the total flow from the reservoir than a single-flash plant. This increase in resource utilization comes with a corresponding increase in plant complexity and ...
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Combined Cycle Geothermal Power Plant
Resource conditions and project economics may allow a plant configuration that combines single-flash and binary technologies. In this arrangement, two-phase flow from the resource is directed to a separator in the same manner assingle-flash, but rather than injecting the separated brine, the brine is directed to binary equipment. There may also be other combined cycle arrangements, such as using a back-pressure steam turbine and binary equipment. In this ...
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Binary - Power Plant
Choice of a particular power plant design is based on a number of factors, with resource temperature being one of the most important considerations. In general, low to moderate temperature resources lend themselves to a binary ...
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Modeling
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Single Flash Non-Condensing Geothermal Power Plant
This is a great starter plant due to low initial cost and the high potential for modular construction. A modular plant is much more portable, allowing for early wellhead power generation while the balance of the wellfield is developed for a large project. In this type of plant, steam is expanded through the turbine and then released to atmosphere without being ...
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Water-Cooled Direct-Contact Condensing Geothermal Power Plant
A condensing plant makes better use of the resource than a non-condensing plant. In this model, steam is expanded through the turbine down to a very low pressure. Hence, much more power can be generated from the same steam flow when compared with non-condensing plants. After leaving the turbine the steam encounters cooling water sprays in a direct contact condenser. The heat gained by the cooling water in the condensing process is typically released to ...
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Air-Cooled Binary Geothermal Power Plant
This process model is similar to the model above but uses a two-phase geothermal resource instead of pumped brine. In this model, the two phase flow is separated with the steam directed to the vaporizer and the separated bring to the preheater. The steam condensate from the vaporizer is also pumped to the preheater. The spent brine is then directed to a reinjection system. The secondary working fluid loop is similar to that in the pumped brine resource ...