Elmegaard, Brian

Madsen, C.

Markussen, Wiebke Brix

Olesen, M.

Rothuizen, Erasmus Damgaard

The Isolated System Energy Charging (ISEC) concept allows for a high efficiency of a heat pump system for hot water production. The ISEC concept consists of two water storage tanks, one charged and one discharged. The charged tank is used for the industrial process, while the discharged tank is charging. The charging of the tank is done by recirculating water through the condenser and thereby gradually heating the water. The modelling of the system is described in Part I [1]. In this part, Part II, an experimental test setup of the tank system is reported, the results are presented and further modelling of the heat pump and tank system is performed (in continuation of Part I). The modelling is extended to include the system performance with different natural refrigerants and the influence of different types of compressors

Olesen, Martin F.

Madsen, Claus

Olsen, Lars

Paaske, Bjarke

Online Research Database In Technology

High efficient ammonia heat pump system for industrial process water using the ISEC concept. Part 2

The purpose of the Isolated System Energy Charging (ISEC) is to provide a high-efficient ammonia heat pump system for hot water production. The ISEC concept uses two storage tanks for the water, one discharged and one charged. The charged tank is used for the industrial process while the discharged tank, is charging. Charging is done by circulating the water in the tank through the condenser several times and thereby gradually heats the water. This result in a lower condensing temperature than if the water was heated in one step. A dynamic model of the system, implemented in Dymola, is used to investigate the performance of the ISEC system. The ISEC concept approaches the efficiency of a number of heat pumps in series and the COP of the system may reach 6.8, which is up to 25 % higher than a conventional heat pump heating water in one step

High efficient ammonia heat pump system for industrial process water using the ISEC concept. Part 1

http://orbit.dtu.dk/ws/files/103263398/High_efficient_ammonia_heat_pump.pdf

High efficient ammonia heat pump system for industrial process water using the ISEC concept. Part 1

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Online Research Database In Technology

Online Research Database In Technology