Heat pumps - challenges for new build and retrofit in domestic applications

摘要

Heat pumps are a proven high-efficiency heating systems with numerous European examples of best practice in both new build and retrofit. However in the UK, in particular, there is a growing body of evidence that suggests a lack of understanding in determining the advantages for a particular house (whether new build or retrofit), thus the system does not meet expectations, and poor installation and operation again lead to the unit not meeting the expectations. Heat pumps arc tested according to EN14511 which is the European test standard. The data stated can be true at one particular point, e.g. for a brine to water heat pump, the coefficient of performance (the ratio of heat supplied to electricity used) is at brine of 0℃ and water supplied at 35℃. Careful attention to performance is required to systems that operate outside these parameters.