Thermally activated heat pump systems

 
 

Volume 24, No.1/2006

 


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In this issue

Thermally activated refrigerating machinery and heat pumps can be powered by solar heat or waste heat and be integrated in CHP systems. A gas engine-driven vapour compression machine is a good alternative to the more common electrically driven machine in countries with a gas distribution network. All this, and more, is described in this issue of the HPC Newsletter - not forgetting, of course, an article on an ice hotel that is in existence year-round.
 

Heat Pump News

Reports on three international research projects
Reports are given on the progress in three of the ongoing Annexes within the Heat Pump Programme. These are “Retrofit heat pumps for buildings”, “Advanced modelling and tools for analysis of energy use in supermarket systems” and “Economical heating and cooling systems for low-energy houses” (p.11-13)

New refrigerants under development
New refrigerants that will meet the EU requirements on GWP for refri-gerants in future automotive air-conditioning systems have been identified by DuPont Fluorochemi-cals. These new refrigerants are expected to be compatible with conventional R134a systems with only minor modifications. (p.7)

Policy paper from the IEA Heat Pump Programme - The potential impact of heat pumps on energy policy concerns

This policy paper gives the IEA Heat Pump Programmes opinion on why heat pumping technologies can help reducing greenhouse gas emissions, reduce exposure to supply risk and reduce infrastructure costs. (p.5)

Topical Articles

Gas engine-driven heat pump systems
The gas heat pump (GHP) uses a natural gas-powered or LPG-powered engine to drive the compressor in a vapour-compres-sion refrigeration cycle. This paper introduces the technology and market trends for the GHP in Japan. (p.14)
 

The feasibility of absorption chillers using low-temperature heat sources
Heat-driven cooling is a proven thermodynamic short cut for energy-efficient cooling. There is a theoretical potential of saving half of the primary fuel needed to produce cooling as compared to conventional vapour compression technology. Key issues from re-search are presented here, along with main conclusions and some thoughts on future R&D requirements. (p.17)

 

Development and commercialisation of triple-effect absorption chiller-heaters
A government-led project aiming towards realising higher efficiency than the maxed-out efficiency of double-effect chiller/heaters has successfully commercialised a triple-effect absorption chiller/ heater. The triple-effect machine has considerably high energy-saving performance. (p.20)

A novel thermally-driven absorption cooling machine based on the diffusion absorption principle

This article describes the development, investigation and simulation of a single-effect solar-heat-driven ammonia/water diffusion absorption cooling machine (DACM) with a design cooling capacity of 2.5 kW. (p.24)

 

Integration of an absorption chiller system in a supermarket heating, cooling and power system

Combined Cooling Heating and Power (CCHP) systems include an electric generator and a means for utilizing the waste heat from the generator. The waste heat can be used for drive an absorption chiller. In the current work, a commercially available, pre-engineered CCHP system was applied to a supermarket application. (p.28)

 

Year round ice hotel chilled by hot spring water

A double lift absorption chiller was installed in the Aurora Ice Museum at Chena Hot Springs, Alaska. The chiller successfully kept the Ice Museum frozen year round, and thus allowed summer visitors to experience winter amenities at the resort. (p.31)