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- W4225613108 abstract "Abstract From the system perspective, a geothermal heat plant is not only a source of heat, but, in case of liquid producing wells producing liquid brine, also a sink for relevant amounts of electricity, consumed mainly by the pump(s). This electricity demand is usually not given much attention, although being decisive for operation costs and offering chances for demand side management as a variable consumer. From the perspective of an integrated energy system, geothermal installations basically move energy from the electricity sector into the heat sector. So do electrical compression heat pumps, whose performance is rated by the COP, the ratio between useful heat and invested energy and useful heat, the COP. This study transfers the COP concept to geothermal sites, by defining and determining the energy conversion factor quantity (i.e. relative auxiliary energy or operating cost of heat provision expressed in electricity) for a selection of mostly German geothermal sites. Based on heterogenous data consisting of operational values for some sites and theoretical estimations for others, the calculated ε range from 12 to 116. In analogy, the concept is extended to the exergy conversion factor ζ, which is calculated to range from 1 to 36. A comparison with alternative heat provision technologies, such as heat pumps (COP ≤ 6) or simple electric heating (ε ≈ 1), quantifies the potential service geothermal plants can render to the grid by converting electrical energy into useful heat. This study aims at quantifying the potential benefit of geothermal plants on for the electric grid." @default.
- W4225613108 created "2022-05-05" @default.
- W4225613108 creator A5033694698 @default.
- W4225613108 date "2021-12-13" @default.
- W4225613108 modified "2023-09-27" @default.
- W4225613108 title "Energy/Exergy Conversion Factors of Low-Enthalpy Geothermal Heat Plants" @default.
- W4225613108 doi "https://doi.org/10.21203/rs.3.rs-242151/v3" @default.
- W4225613108 hasPublicationYear "2021" @default.
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