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and stable temperature during the heating season, is abundantly available, is not corrosive or polluted, has favorable thermophysical properties, and its utilization requires low investment and operational costs. In most cases, however, the availability of the heat source is the key factor determining its use. Table 2 below presents commonly used heat sources and their heat source range. Heat pump technologies, when properly engineered, have proven successful with Alaska temperatures. Ambient and exhaust air, soil and ground water are practical heat sources for small heat pump systems, while sea/lake/river water, rock (geothermal) and waste water are used for large heat pump systems. Recently, Alaska has led in seawater heat pump applications at the Seward Sea Life facility and the Juneau NOAA Ted Stevens Marine Research Institute. Heat Source Capacity Range Table Heat Source Commonly Used Heat Sources Heat Source Tempera ture Range (°C) Tempera ture Range (°F) Ambient Air -10 25 Exhaust Air 15 25 Ground Water 4 10 Lake Water 0 10 River Water 0 10 Sea Water 3 8 Rock 0 5 Ground 0 10 Waste water and effluent >10 >10 Table 2 Commonly used Heat Pump heat sources and Temperature Range (source: www.heatpumpcentre.org) Types of Heat Pumps that would economically and environmentally benefit Juneau, Alaska Seawater Heat Pump (SWHP) Seawater heat pumps are water-to-water systems that operate by using electric compressors in combination with the physical properties of an evaporating and condensing fluid known as a 3PDF Image | Heat Pump Technology
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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