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Heat Pumps Technology Guide SEAI 2. Overview of heat pumps Key messages • A heat pump system is a sealed loop that contains a gas. It uses an electrically driven compressor to compress the gas, taking it from a low temperature and pressure to a higher temperature and pressure. • One of the main factors that effects heat pump system efficiency is the difference between the mean temperature in the evaporator and the temperature in the condenser. • Heat pump performance efficiency is measured by the coefficient of performance. This is the ratio of heat output to electricity input at a specified set of operating temperatures for the flow and return in the heat source system, and the flow and return in the heating system. • The seasonal performance factor is the ratio of the units of heat delivered in kWh over one full year to the units of electricity consumed over that same period. It is a measure of the heat pump system’s operational performance. Heat pumps are similar to refrigerators and air-conditioning systems: they use a refrigerant cycle to extract very low- grade heat (usually under 25 °C) and upgrade it to a higher temperature. A heat pump consists of three linked systems: • The source, from where heat is extracted, e.g. air or water; • The refrigeration system, which upgrades/generates the heat; and • The heat distribution system, which brings the heat to the points of use, e.g. radiators. Heat pumps can supply different types of heat distribution systems. Some heat air directly, whereas others provide heat through water. These ‘wet systems’ are normally used for space heating or hot water supply. This guide focuses on heat pumps that distribute heat through water. Figure 1: Basic diagram of a heat pump 2PDF Image | Heat Pumps Technology Guide
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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