Energy - wise design and regulation of the secondary side of indirect cooling systems with natural coolants

All relevant secondary refrigerants have been identified, and associated application knowledge and calculation of the thermo-physical data developed and provided. It has created an overview and relevant configurations of the secondary side for supermarket refrigeration and air-conditionings systems for office buildings.

There are particularly focused on the design of various pump circuits, and it is concluded that it will often be the cheapest in both procurement and energy use of a system with one primary variable speed pump. The pump capacity and dynamism to play appropriately with capacity control of the evaporator. There have been a real theoretical and experimental study of CO2 secondary systems with pump and alternative natural circulation.

It has been shown that there may be problems getting time in the natural circulation if there are several parallel evaporators, while at an evaporator systems is a question of proper sizing of pipes and liquid column.

Project documentation in the form of DESIKPack can also serve as teaching material, which can be useful when the general level of knowledge about secondary systems are too modest.