Performance characteristics of a combined ejector - absorption heat pump using NH3 - H2O

Kouremenos, DA; Rogdakis, ED; Alexis, GK

dc.contributor.author	Kouremenos, DA	en
dc.contributor.author	Rogdakis, ED	en
dc.contributor.author	Alexis, GK	en
dc.date.accessioned	2014-03-01T01:48:42Z
dc.date.available	2014-03-01T01:48:42Z
dc.date.issued	1999	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25563
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0033300457&partnerID=40&md5=5427bd9bacec63ee0f361375c2a72706	en
dc.subject.other	Ejectors (pumps)	en
dc.subject.other	Energy absorption	en
dc.subject.other	Enthalpy	en
dc.subject.other	Entropy	en
dc.subject.other	Mixtures	en
dc.subject.other	Temperature	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Flow entrainment ratio	en
dc.subject.other	Heat gain factor	en
dc.subject.other	Mass fraction	en
dc.subject.other	Heat pump systems	en
dc.title	Performance characteristics of a combined ejector - absorption heat pump using NH3 - H2O	en
heal.type	journalArticle	en
heal.publicationDate	1999	en
heal.abstract	Absorption system have been investigated for many years. However, coefficient of performance COP or heat gain factor HGF for absorption systems are significantly lower than those for conventional compression systems. This has restricted their wide application. This paper discusses the behavior of mixture NH3 - H2O through of an ejector, operating in an absorption heat pump system. This combination improves the performance of conventional absorption system and with the phasing out of ozone - damaging refrigerants, absorption refrigerators, heat pumps and air - conditioning now provide a potential alternative. For the detailed calculation of the proposed system a method has been developed, which employs analytical functions describing the thermodynamic properties of the mixture. The influence of three major parameters: generator, condenser and evaporator temperature, on ejector efficiency and heat gain factor of the system is discussed. Also the maximum value of HGF was estimated by correlation of above three temperatures.	en
heal.publisher	ASME, Fairfield, NJ, United States	en
heal.journalName	American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES	en
dc.identifier.volume	39	en
dc.identifier.spage	679	en
dc.identifier.epage	687	en