18 May 2017

P.1.7.5 Booster Heat Pump, development of test procedure and calculation methodology in order to estimate the energy performance in various domestic applications

Increasing targets for building energy performance also stimulate manufacturers to further innovations. One of these innovations is the Booster Heat Pump (BHP); a heat pump for preparation of domestic hot water with a with variable and elevated temperature heat source.
The principle of the Booster Heat Pump (BHP) is appealing: Preparation of Domestic Hot Water, on the spot, with a heat pump that uses a heat source with moderate temperature level (sufficient to provide space heating). Thermodynamically it makes sense (exergy), but two questions need to be answered:
1. What is the overall energy efficiency, taken into account that the Booster Heat Pump uses electricity and thermal energy, that possibly both require primary (fossil) fuel?
2. How to assess the energy performance of the BHP in the Dutch standards (NEN7120 and NVN7125)?
By definition, innovations do not comply with the standards for energy performance assessment; For conformity, new rules must be formulated. Following previous projects focussed on air/water heat pumps and solar assisted heat pumps, this task has been executed in a joint governmental/industry working Group.