COSP (Coefficient of system performance)
The COSP of a heat pump is based on the total heat extracted (also referred to as Q) in relation to the energy supplied to the heat pump (also referred to as W).
Generally, metallic corrosion involves the degradation of an exposed metal surface. Corrosion occurs in various forms ranging from uniform attacks over the entire surface to severe local attacks. Crevice corrosion starts more easily than for example pitting corrosion, another form of localized corrosion. Crevice corrosion occurs at narrow openings or spaces between two metal surfaces or between metals and non-metal surfaces. It is usually associated with stagnant conditions in the crevice. ...