Abstract
Integration of several in-house heat stations containing of multiple boilers of different capacity and energy carriers can be economical profitable. This study contains further analyze and development of previous work by Riise and Sørensen [1-3]. Boiler start-up costs effect of the overall energy cost has been investigated and found to have an impact of boiler configurations in a system based on lowest specific running energy cost. A study of operational hours of boilers indicates if boilers can be dismounted form the integrated system. It is also performed simulations for lowest energy consumption instead lowest energy cost. Finally a heat pump model is introduced and analyzed. Introduction of the heat pump reduces the total energy cost even if the heat sink is increased with a fourth building.
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