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Type Development Status Description C- Thermally Based Technologies: Available with large range capacity for lithium bromide- water absorption units. Water- ammonia units of various capacities also available. Efficiency improving steadily. Absorption heat pump Widely commercially available Commercially available R&D Duplex-Stirling heat pump Commercially available for cryocooling, comm. refrig. applications. Uses a Stirling engine. Adsorption heat pump Vuilleumier heat pump Ejector heat pump Stand-alone solid desiccant AC Ground-coupled solid desiccant AC Stand-alone liquid desiccant AC Evaporative liquid desiccant AC 12.6 References Uses a hygroscopic salt with high affinity to water as an adsorption media and water as the refrigerant. Vuilleumier heat pumps are similar to Duplex Emerging Stirling engine heat pumps, but utilize two pistons instead of one piston. Uses an ejector technology to produce heat. Recovered ejector heat improves efficiency. Uses liquid desiccant technology for cooling. R&D Ground coupled solid desiccant cooling technology combine two technologies. Emerging Liquid desiccant technology is used instead of solid desiccant. Emerging Combines liquid desiccant technology and evaporative cooling technology. Commercially available Commercially available ADL. 1986. Status of Free Piston Stirling Engine Driven Heat Pumps – development, Issues, and Options. Arthur D. Little, Inc. Prepared for Oak Ridge National Laboratory. ORNL/Sub/84- 00205/1. April 1986. Aidoun and Martel. 2009. Ejectors. CanmetENERGY. Natural Resources Canada. July 2009. ARPA, 2013. Advanced Research Projects Agency – Energy (ARPA-e), date unknown. “Dais Analytic Corporation: Nanotechnology Membrane-Based Dehumidifier.” Building Energy Efficiency through Innovative Thermo-devices (BEETIT) Project Description. Retrieved November 13, 2013. ARPA, 2013b. Advanced Research Projects Agency – Energy (ARPA-e), date unknown. “Pennsylvania State University: Helium-Based Soundwave Chiller.” Building Energy Efficiency through Innovative Thermodevices (BEETIT) Project Description. Retrieved November 5, 2013. ARPA, 2013c. Advanced Research Projects Agency – Energy (ARPA-e), date unknown. “University of Maryland: Thermoelastic Cooling.” Building Energy Efficiency through Innovative Thermodevices (BEETIT) Project Description. Retrieved October 28, 2013. ASHRAE, 2014. ASHRAE Journal, October 2014. Technical Feature. Alternatives to Vapour- Compression HVAC Technology. By William Goetzler (member ASHRAE), Robert Zogg, Jim Young and Caitlin Johnson. Butler et al. 2001. Using Air for Cooling. Building research Establishment Ltd. January (2), 2001. 2018 TOC Refrigeration, A/C and Heat Pumps Assessment Report 249PDF Image | Heat Pumps Technical Options
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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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