Projekte

Modeling of heat transfer mechanisms in a room with cooling surfaces with novel heat exchange media  <<

Akronym PC-Cools
Funding ZAE Bayern
Request for Proposal Auftragsforschung
Supporting Organisation ZAE Bayern
HFT project director Prof. Dr. Andreas Beck
Duration 01.10.2012 - 30.09.2013
Project description Within the project three interconnected topics were treated: 1 Development of salt hydrates as PCMs with melting points adapted to their use for indoor space cooling, for example with chilled ceilings. 2 Salt hydrates are water soluble and therefore need encapsulation. The development of the encapsulation was the second topic within the project. 3 A study on the energy demand of different kinds of cold distribution mechanisms accompanied the aforementioned activities. Within the project, the University of Applied Sciences Stuttgart (HFT Stuttgart) compiled part 3, the study on the cold distribution systems. The study compares different mechanisms of cold distribution within buildings: common, water-based cold networks as opposed to novel cold networks using phase change slurries (PCS) and heat pipes. In either case, heat take-up from the rooms in the building is accomplished using chilled ceilings. Additionally water-based chilled ceilings with a PCM-layer on top were modelled. For each kind of chilled ceiling a calculation model was developed and implemented. A three-storey office building was taken as an example. For this building the cold distribution piping networks were planned according to the respective heat transfer fluids and the respective mass flow rates necessary for a pre-defined cooling capacity. Based on this, the pressure loss in the piping network and the electrical energy demand could be calculated.