Pre study. Prototype of CO2 heat pump system for heating and cooling of a larger building

The activities concerning CO2 heat pumps during NTNU-SINTEF's strategic research program SMARTBYGG (2002-2006) has lead to an increased interest in planning, building, installing and testing a prototype CO2 heat pump for heating and cooling of a larger building. In cooperation with Statsbygg and Naeringslivets Idefond a p restudy was initiated in 2005, with the main aim to carry out a set of defined activities, preparing the ground for the realization of a prototype. The following subjects are treated in the p restudy: a technological assessment of the CO2 heat pumps, a technological assessment of the interaction between the CO2 heat pump and the secondary systems, a study of the possibilities regarding suitable CO2 components including compressors, heat exchangers, valves etc., and a presentation of Teknotherm AS (Halden), a Norwegian industrial partner that can project, build and maintain a CO2 heat pump prototype. During the project period Statsbygg has not found a suitable building where a prototype can be installed. It is recommended that further work is made on the realization of a CO2 prototype plant by setting up a main project (ml)