Heat Pumps Today

CMYK / .ai CMYK / .ai CMYK / .ai www.acrjournal.uk/heat-pumps C O MM E N T 09 This higher temperature capability provides a way to utilise heat pumps via very straightforward integration within an existing heating or hot water system on a fixed temperature or variable temperature weather/compensated basis. As an example; the OHT air-source range provided by Pure Thermal delivers 80°C high temperature capability with a low global warming potential (Low GWP) refrigerant-based system. The Pure Thermal Application Team commented that they are regularly providing heat pump selections that are capable of operating with 75°C output flow temperatures where a heat pump is required to be integrated within a heating system that has an existing boiler. They also noted, interestingly, that many of the systems are hybrid where a boiler is used to operate alongside the high temperature heat pump in ambient temperatures below for example 3°C. This reduces the required heat pump capacity and its capital cost whilst importantly enabling the high 900kW heating capacity in a single system with an 80°C output flow which is a real step change from how Heat Pumps have been conventionally viewed. In summary the capacity and higher temperatures available means that Heat Pumps can now be considered as a definite retrofit option. Especially, as we now enter this period where the decarbonisation of heat within commercial scale applications is a rapidly developing priority. Pure Thermal OHT Single Stage air-source range performance temperature capable heat pump to provide primary heating duty for the bulk of the heating season with the most e cient performance levels. This hybrid method of operation enables the highest levels of carbon reduction to be achieved alongside reduced heat pump capital costs. It is interesting to note that these high temperature capable heat pump ranges have the ability to deliver upwards of