PDF Publication Title:
Text from PDF Page: 027
Heat Pumps for Heating and Cooling This may reduce performance and the unit’s ability to provide dehumidification in the summer. Also, as the outdoor air temperature drops, so does the efficiency of an air-source heat pump. Consequently, it doesn’t make economic sense to try to meet all your heating needs with an air-source heat pump. As a rule, an air-source heat pump should be sized to provide no more than 125 percent of the cooling load. A heat pump selected in this manner would meet about 80 to 90% of the annual heating load, depending on climate zone, and would have a balance point between 0°C and –5°C. This generally results in the best combination of cost and seasonal performance. 2.7. Technology Advancements In cold climate areas, air-source heat pumps which utilize ambient heat are less efficient than those in warmer areas. In the past, when the heat pump technology was not so advanced as today, the heating performance of some pieces of heat pump equipment drastically declined when the outside air temperature became low. Therefore, air-source heat pumps were rarely introduced for heating purposes, while fossil fuel combustion boilers were mainly used under such cold climate. However, the performance of air-source heat pumps has been remarkably improved in recent years, and some products newly born have sufficient heating performance even at an outside air temperature of -25°C due to the enhanced performance of compressors and heat exchangers. For example, an air-source heat pump water heating system for residential use that was invented by Daikin Industries, Ltd. in 2006 and Mitsubishi Electric Corp. in 2009 can supply sufficient heat in a climate below freezing point, and achieve a level of COP 3 at an outside air temperature of -10°C. 2.8. Operating Costs and Payback The energy costs of a heat pump can be lower than those of other heating systems, particularly electric or oil heating systems. However, the relative savings will depend on whether you are currently using electricity, oil, propane or natural gas, and on the relative costs of different energy sources in your area. By running a heat pump, you will use less gas or oil, but more electricity. If you live in an area where electricity is expensive, your operating costs may be higher. Depending on these factors, the payback period for investment in an 26PDF Image | Heat Pumps for Heating and Cooling
PDF Search Title:
Heat Pumps for Heating and CoolingOriginal File Name Searched:
heat-pumps-for-cooling-r1.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)