In contrast to traditional fixed-output CHP unit, the LoadTracker unit monitors the site’s electrical consumption and modulates to match the demand. This maximises the run-time of the CHP and minimises the use of expensive mains electricity and back-up boilers.
The 7 Series Indirect FlatStations in each apartment supply both space heating and instantaneous hot water. Each FlatStation uses a differential pressure control valve to ensure that differential pressure remains at around 35kPa in every unit, irrespective of location within the distribution system. The result is that DHW temperature is controlled to within +/- 2.5°C.
The high level of efficiency delivered by the FlatStations also helps to reduce the primary return temperature, resulting in improved CHP performance. This is achieved through efficient heat transfer across the plate heat exchangers, combined with differential pressure control valves and thermostatic valves that take account of variations in pressure and temperature.
In addition, an integral idle temperature controller in the control valve will ensure that water in the supply pipe remains warm. This enables the DHW to be highly responsive – even at times when space heating loads are low.
SAV’s Ultrasonic energy meters and pulsed output water meters monitor and provide detailed personal consumption of energy and cold water for billing and energy monitoring purposes.