PDF Publication Title:
Text from PDF Page: 038
RETROFIT PROJECT 8: DHW: CENTRAL DHW PLANT CENTRAL AWHP PLANT Cost Complexity Technology Gaps Major Considerations $1.5-$3/SF Low – does not require tenant space access but finding a suitable outdoor installation location may be difficult Limitations in cold weather performance, though adequate products are available overseas. Refrigerants used by U.S.-available commercial units are HFCs. Residential- scale units use R-744 (CO2 ). CO2-refrigerant units are available globally and increasingly available in the US. Unlike other heat pump applications, this retrofit can be completed with no disturbance to tenant spaces. What: Description of the Technology Domestic hot water is delivered via the existing distribution system, and the central plant is replaced by a large AWHP with adequate thermal storage. Alternatively, single-family size AWHPs can be joined together for smaller buildings to create a central plant. The existing water heaters can be removed or remain in place for backup. HPWHs are best operated using long runtimes with minimal compressor cycling. This runtime strategy necessitates a buffer from the demands of the building in the form of thermal storage. By including thermal storage in the design, overall plant capacity can be decreased, since the tank acts as a buffer for demand spikes. A central storage tank can be located where space is available. The same central AWHP plant can provide hot water energy for space heating and DHW. The system does not integrate with a steam heating system but can integrate with a hot water heating system. The AWHPs cool air to heat water, and this cooled air may be used for some form of cooling. This cooling effect depends on hot water use, though, so the amount and timing of the cool air could be difficult to tightly control. In theory, some space cooling could be provided, offsetting other cooling equipment. Figure 15. AWHP schematic. Image source: SWA/ Mayekawa Steven Winter Associates,Inc. 38PDF Image | HEAT PUMP RETROFIT STRATEGIES FOR MULTIFAMILY BUILDINGS
PDF Search Title:
HEAT PUMP RETROFIT STRATEGIES FOR MULTIFAMILY BUILDINGSOriginal File Name Searched:
heat-pump-retrofit-strategies-report-05082019.pdfDIY PDF Search: Google It | Yahoo | Bing
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
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)