The New Duct Ground Heat Model for TRNSYS.

Pahud, Daniel and Hellström, Göran (1996) The New Duct Ground Heat Model for TRNSYS. In: Eurotherm - Physical Models For Thermal Energy Stores Physical Models For Thermal Energy Stores, 25.03.1996-27.03.1996, Eindhoven, Netherlands.

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A new version of DST, the duct ground heat storage model, is developed for TRNSYS, a modular programme for the simulation of partial or complete energy systems. It combines the easy utilisation of the previous version for TRNSYS with the additional features of a more detailed version. The new improvements concern the local heat transfer along the flow path within the storage region. The modifications are based on detailed analyses of the thermal interaction between a solar collector field and a duct store. The DST model has been validated against measurements from several duct stores in operation. Detailed and time-consuming programmes were used to check the implementation of the new features. The present model is still reasonably fast and a large range of energy systems can be analysed for optimisation purposes.

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