A device that transfers heat from a colder area to a hotter area by using mechanical energy, as in a refrigerator
A heat pump is a machine or device that moves heat from one location (the 'source') at a lower temperature to another location (the 'sink' or 'heat sink') at a higher temperature using mechanical work or a high-temperature heat source.
A device which uses compression and decompression of gas to heat and/or cool a house.
apparatus that extracts heat from a liquid that is at a higher temperature than its surroundings; can be used to transfer heat from a reservoir outside in order to heat a building
choice: the act of choosing or selecting; "your choice of colors was unfortunate"; "you can take your pick"
an assortment of things from which a choice can be made; "the store carried a large selection of shoes"
choice: the person or thing chosen or selected; "he was my pick for mayor"
The action or fact of carefully choosing someone or something as being the best or most suitable
A number of carefully chosen things
A range of things from which a choice may be made
Novak L., ICR 2011 Technical Session
Technical Session, Thursday 25 August: Heat pumps and natural refrigerants I
Presentation of paper: Refrigerant selection for a heat pump tumble dryer, by Novak L., EMBRACO Slovakia s.r.o., Spisska Nova Ves, Slovakia