Global warming: A result of greenhouse gas emissions or of heat-up of the surroundings by power plants?

Ron Zevenhoven*, Asfaw Beyene

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Konferenssiin myötävaikuttaminenTutkielmavertaisarvioitu

Abstrakti

The evidence on global climate change, and that these changes are caused primarily by rising levels of greenhouse gase in the atmosphere, is now perceived as fairly conclusive. The changes are generally attributed to the so-called enhanced greenhouse effect, a phenomenon resulting from higher levels of trapped thermal infra-red radiation (TIR) from earth to space by the increasing concentration of gases such as CO2. Much of these gases originate from power plants and fossil fuel combustion. Thus, the impact of greenhouse gases on climate change is very well debated if not understood. However, the fate of vast amounts of waste heat rejected into the local environment has evaded serious scholarly research. While a typical condensing coal-fired power plant emits ∼1 kg of CO2 per kWh electricity generated, it also puts about twice the amount of this useful energy into the surrounding environment as low grade heat. For nuclear (fission) energy the waste heat release is similar or even higher despite no rejection of greenhouse gases. This paper attempts to evaluate the impact of waste heat rejection on the surrounding as a combined model with greenhouse gas emissions using Finland and California, USA, as case examples. It is shown that the heating effect of waste heat release from power production is ∼ 40% of the simultaneously occuring radiative forcing heating effect. More calculations and sensitivity to parameters like wind speed are introduced. The regional variations are also assessed based on the two case scenarios.

AlkuperäiskieliEnglanti
Sivut987-994
Sivumäärä8
TilaJulkaistu - 2009
OKM-julkaisutyyppiO2 Other
Tapahtuma22nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2009 - Foz du Iguacu, Parana, Brazil
Kesto: 30 elokuuta 20093 syyskuuta 2009

Konferenssi

Konferenssi22nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2009
MaaBrazil
KaupunkiFoz du Iguacu, Parana
Ajanjakso30/08/0903/09/09

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