Transient operation of solar-driven NH3/H2O absorption units during single days

Kouremenos, DA; Rogdakis, E; Antonopoulos, KA

dc.contributor.author	Kouremenos, DA	en
dc.contributor.author	Rogdakis, E	en
dc.contributor.author	Antonopoulos, KA	en
dc.date.accessioned	2014-03-01T02:47:52Z
dc.date.available	2014-03-01T02:47:52Z
dc.date.issued	1988	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33395
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0024135336&partnerID=40&md5=5973de8c4793e7e2c87e510ab10b69d5	en
dc.subject.other	Solar Radiation--Collectors	en
dc.subject.other	Absorption Heat Pumps	en
dc.subject.other	Absorption Heat Transformers	en
dc.subject.other	Parabolic Troughs Operation	en
dc.subject.other	Solar Driven Absorption Units	en
dc.subject.other	Refrigerating Machinery	en
dc.title	Transient operation of solar-driven NH3/H2O absorption units during single days	en
heal.type	conferenceItem	en
heal.publicationDate	1988	en
heal.abstract	The transient performance of solar driven NH3/H2O absorption units operating as refrigerators, heat pumps or heat transformers is examined hour by hour, under conditions of minimum, mean and maximum cloudiness in the Athens area, employing solar radiation and ambient dry bulb temperature data of the period 1960-1972. The performance during single days within this period is also calculated. Concentrating and flat plate evacuated solar collectors are considered. The thermodynamics of the absorption cycles is simulated by a suitable method and a corresponding computer code, based on analytic functions describing the behavior of the binary mixture NH3/H2 O. It is found that in the case of the refrigerator, the heat pump and the heat transformer, the theoretical coefficient of performance and the theoretical heat gain factors vary during the year from 72% to 77%, from 156% to 170% and from 44% to 48.5%, respectively. The theoretical useful thermal power expected to be delivered by the heat pump operating with concentrating collectors under conditions of minimum, mean and maximum cloudiness during February is 500, 270 and 0 W/m2.	en
heal.publisher	Publ by American Soc of Mechanical Engineers (ASME), New York, NY, United States	en
heal.journalName	American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES	en
dc.identifier.volume	5	en
dc.identifier.spage	55	en
dc.identifier.epage	61	en