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Heating Knowledge

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Coabsorbent heat pumps for the future-news-119

Jun. 27, 2007 – Based on the coabsorbent cycles, recently introduced by the author, a particular new technology can be developed for extremely efficient and feasible heat pumping applications. The paper presents model results of residential and district ammonia/water heating applications for coabsorbent hybrid and absorption heat pumps, supplied by…

Application of ammonia heat pumps in Norway-news-122

Jul. 03, 2007 – Norway The use of naturally occurring and ecologically safe substances as working fluids in heat pumps represents an environmental friendly and long-term solution to the problems of HFCs. The most important natural working fluids include ammonia, hydrocarbons and carbon dioxide. This article discusses the main characteristics…

2007 Solar Decathlon winner awarded-news-125

Oct. 26, 2007 – Technische Universität Darmstadt is the overall winner of the 2007 Solar Decathlon. This competition challenges 20 college teams from around the world in 10 contests to design, build and operate the most livable, energy-efficient, completely solar-powered house. Solar Decathlon houses must power all the home energy…

Energy Research in the Netherlands Built Environment-news-124

Oct. 10, 2007 – Netherlands – Energy Research SubsidyAs the Netherlands Government shifts its research strategy focus to the long term, it has identified the built environment as one of five energy research priority areas, now presented as formal energy research programmes. Long Term Research Programme: Built EnvironmentThe built environment…

ASHRAE headquarters under renovation-news-126

Nov. 20, 2007 – The renovation of ASHRAE headquarters is expected to be completed in June 2008 at an estimated cost of $5.4 million. Once completed, the renovated building in Atlanta will feature two separate HVAC systems as part of its role as living lab. Level one of the building…

Development trends for heat pump components-news-127

Nov. 26, 2007 – Given the critical importance of energy and cost savings, the application of engineering and management principles has the potential to reshape the design of modern heat pump systems. Microchannel heat exchangers, ejectors, and injection-compressors are some of the latest more interesting developments in heat pump components…

Compressors for heat pumps-news-130

Dec. 03, 2007 – The overall effi ciency of a heat pump system is highly dependent on the performance of the compressor. Compressors in heat pumps not only encounter a wider range of operating conditions than in traditional air conditioners, but also have two to three times longer run times…

Microchannel heat exchangers-news-128

Nov. 26, 2007 – The air conditioning industry faces a constant challenge to provide higher effi ciency levels and greater equipment reliability. This challenge is even more difficult to meet when the goal is simultaneously to maintain equipment size and limit potential cost impact. Previous engineering solutions designed to satisfy…

Heat pump component development trends-news-129

Nov. 26, 2007 – The present development of the heat pump market is extremely interesting: in regions such as Japan and the US, where the market is dominated by air-to-air units, ground-coupled systems are obtaining an increasing share, while in regions such as Central and Northern Europe, which are dominated…