Abstract
New residential houses are better insulated, and this reduces the need for heat during the winter period. In addition to this many new houses have floor heating systems. This combination is favourable for small heat pumps which can produce heat to central water systems with low water temperatures in the area 25 to 35 C. 4 prototypes of mini heat pumps of the brine/water type was build and tested in the refrigeration laboratory at the Danish Technological Institute (DTI). The prototypes are using a variable speed compressor (Danfoss SLV12) which originally is developed for plug-in supermarket cabinets. The heating capacity of the prototypes can vary between 1.0 and 2.1 kW. The refrigerant charge is 150 grams of R290 (propane). Two prototypes are charged with 375 grams of R134a. Tests were conducted following EN14511 at 0/+35 C and COP was measured to between 3.2 and 3.6 depending of the compressor speed and the type of plate heat exchangers used. This is quite good for such small machines. One of the prototypes was installed in the Energy Flex House which is a new highly insulated test house build at the DTI. The house was equipped with two heat pumps: 1. An exhaust
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Pedersen, Per Henrik;
Madsen, Claus;
Frederiksen, Klaus;
Andreasen, Marcin Blazniak
[1]
- Teknologisk Institut, Koele- og Varmepumpeteknik, Taastrup (Denmark)
Citation Formats
Pedersen, Per Henrik, Madsen, Claus, Frederiksen, Klaus, and Andreasen, Marcin Blazniak.
Development and testing of mini heat pump for low-energy houses. Final report; Udvikling og test af minivarmepumpe til lavenergihuse. Slutrapport.
Denmark: N. p.,
2010.
Web.
Pedersen, Per Henrik, Madsen, Claus, Frederiksen, Klaus, & Andreasen, Marcin Blazniak.
Development and testing of mini heat pump for low-energy houses. Final report; Udvikling og test af minivarmepumpe til lavenergihuse. Slutrapport.
Denmark.
Pedersen, Per Henrik, Madsen, Claus, Frederiksen, Klaus, and Andreasen, Marcin Blazniak.
2010.
"Development and testing of mini heat pump for low-energy houses. Final report; Udvikling og test af minivarmepumpe til lavenergihuse. Slutrapport."
Denmark.
@misc{etde_1008033,
title = {Development and testing of mini heat pump for low-energy houses. Final report; Udvikling og test af minivarmepumpe til lavenergihuse. Slutrapport}
author = {Pedersen, Per Henrik, Madsen, Claus, Frederiksen, Klaus, and Andreasen, Marcin Blazniak}
abstractNote = {New residential houses are better insulated, and this reduces the need for heat during the winter period. In addition to this many new houses have floor heating systems. This combination is favourable for small heat pumps which can produce heat to central water systems with low water temperatures in the area 25 to 35 C. 4 prototypes of mini heat pumps of the brine/water type was build and tested in the refrigeration laboratory at the Danish Technological Institute (DTI). The prototypes are using a variable speed compressor (Danfoss SLV12) which originally is developed for plug-in supermarket cabinets. The heating capacity of the prototypes can vary between 1.0 and 2.1 kW. The refrigerant charge is 150 grams of R290 (propane). Two prototypes are charged with 375 grams of R134a. Tests were conducted following EN14511 at 0/+35 C and COP was measured to between 3.2 and 3.6 depending of the compressor speed and the type of plate heat exchangers used. This is quite good for such small machines. One of the prototypes was installed in the Energy Flex House which is a new highly insulated test house build at the DTI. The house was equipped with two heat pumps: 1. An exhaust air heat pump taking energy from exhaust air and producing hot tap water and heating the intake air; 2. A mini heat pump for floor heating taking energy from ground source outside the house. A family with four persons lives in the house. During the cold winter 2009/2010 the mini heat pump showed good performance and the COP varies between 2.0 and 4.0. The lower value was caused by a fault in the floor heating hoses, which made it necessary to increase the temperature of the central heating water, which decreased the efficiency of the heat pump during the coldest winter period. The floor heating system has been repaired, and a new prototype heat pump with a slightly bigger compressor has been installed for the heating season 2010/2011. A heat pump manufacturer is now producing this combination of exhaust air heat pump and mini heat pump for floor heating and several systems have been installed in Northern Europe. (Author)}
place = {Denmark}
year = {2010}
month = {Nov}
}
title = {Development and testing of mini heat pump for low-energy houses. Final report; Udvikling og test af minivarmepumpe til lavenergihuse. Slutrapport}
author = {Pedersen, Per Henrik, Madsen, Claus, Frederiksen, Klaus, and Andreasen, Marcin Blazniak}
abstractNote = {New residential houses are better insulated, and this reduces the need for heat during the winter period. In addition to this many new houses have floor heating systems. This combination is favourable for small heat pumps which can produce heat to central water systems with low water temperatures in the area 25 to 35 C. 4 prototypes of mini heat pumps of the brine/water type was build and tested in the refrigeration laboratory at the Danish Technological Institute (DTI). The prototypes are using a variable speed compressor (Danfoss SLV12) which originally is developed for plug-in supermarket cabinets. The heating capacity of the prototypes can vary between 1.0 and 2.1 kW. The refrigerant charge is 150 grams of R290 (propane). Two prototypes are charged with 375 grams of R134a. Tests were conducted following EN14511 at 0/+35 C and COP was measured to between 3.2 and 3.6 depending of the compressor speed and the type of plate heat exchangers used. This is quite good for such small machines. One of the prototypes was installed in the Energy Flex House which is a new highly insulated test house build at the DTI. The house was equipped with two heat pumps: 1. An exhaust air heat pump taking energy from exhaust air and producing hot tap water and heating the intake air; 2. A mini heat pump for floor heating taking energy from ground source outside the house. A family with four persons lives in the house. During the cold winter 2009/2010 the mini heat pump showed good performance and the COP varies between 2.0 and 4.0. The lower value was caused by a fault in the floor heating hoses, which made it necessary to increase the temperature of the central heating water, which decreased the efficiency of the heat pump during the coldest winter period. The floor heating system has been repaired, and a new prototype heat pump with a slightly bigger compressor has been installed for the heating season 2010/2011. A heat pump manufacturer is now producing this combination of exhaust air heat pump and mini heat pump for floor heating and several systems have been installed in Northern Europe. (Author)}
place = {Denmark}
year = {2010}
month = {Nov}
}