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Title: Management of power plant waste heat in cold regions
Authors: Thayer School of Engineering.
Aamot, H. W. C. (Haldor W. C.)
Keywords: Electric power plants
Heat transmission
Heat sinks
Heat transfer
Heat recovery
Heat pumps
Heat engineering
Cold regions
Space heating
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Technical Report
Abstract: Surface water resources cannot meet the increasing cooling needs of power plants in the future and in cold regions the need for dry methods of waste heat disposal is pressing now. The dry or hybrid cooling tower is the best alternative to avoid adverse environmental effects. During cold weather it also permits low condensing temperatures that can be utilized by an organic fluid Rankine bottoming cycle. This is shown to increase the overall conversion efficiency for generating electricity by 5 to 10% and to reduce the amount of waste heat to be dissipated. Space heating is one of the largest potential opportunities for waste heat utilization and, consequently, for reducing waste heat disposal. Steam is used in some urban areas to that effect. Cooling water has not been exploited for that purpose because it is too cool for direct use, but heat pumps are shown to make it practical and economically very attractive as a heat source. Cooling water can be transported efficiently over greater distances than steam or hot water and supplied to less densely populated areas. It also offers an opportunity to reduce energy needs for air conditioning because it is a more efficient heat sink than ambient air. The same heat pump provides heating as well as cooling. The design of a heat pump system using power plant cooling water to heat homes in Fairbanks, Alaska, shows, that, compared with oil burning and electric resistance heating, waste heat disposal from the plant is reduced, air pollution is reduced and its control improved, overall energy needs are reduced, opportunities for fuel substitution are increased, available technology and equipment can be used, and the cost of conversion from existing heating method pays for itself with a small profit.
Appears in Collections:CRREL Technical Report

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