Hour-by-hour simulation of solar H2OLiBr absorption heat transformers in Athens

Kouremenos, DA; Antonopoulos, KA; Rogdakis, E

dc.contributor.author	Kouremenos, DA	en
dc.contributor.author	Antonopoulos, KA	en
dc.contributor.author	Rogdakis, E	en
dc.date.accessioned	2014-03-01T01:39:59Z
dc.date.available	2014-03-01T01:39:59Z
dc.date.issued	1990	en
dc.identifier.issn	0741983X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/23042
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0025214766&partnerID=40&md5=e64022b4a55198d74373ebf8ce3f7cad	en
dc.subject.other	Refrigerating Machinery--Absorption	en
dc.subject.other	Statistical Methods--Statistical Tests	en
dc.subject.other	Thermodynamics--Calculations	en
dc.subject.other	Absorption Heat Transformers	en
dc.subject.other	Flat Plate Collectors	en
dc.subject.other	Heat Gain Factor	en
dc.subject.other	Thermodynamic Cycle	en
dc.subject.other	Refrigeration	en
dc.title	Hour-by-hour simulation of solar H2OLiBr absorption heat transformers in Athens	en
heal.type	journalArticle	en
heal.publicationDate	1990	en
heal.abstract	A method is presented for predicting the performance of solar H2OLiBr absorption heat transformers, which receive solar heat at an intermediate-temperature level, reject a part of it in the ambient at a low-temperature level and deliver the remaining useful heat at a high-temperature level. Simple relations are derived, which define the exact thermodynamic cycle of heat transformer and allow calculation of characteristic temperatures and heat quantities exchanged in terms of the main parameters of the unit. A correlation linking the heat gain factor to the main parameters is presented, which may be used for calculating the optimum cycle. The procedure developed has been employed for predicting the hour-by-hour performance of solar driven absorption heat transformers in the Athens area along a typical year, using mean climatological conditions obtained by processing of 20 years hourly measurements. The theoretical heat gain factor has been found to be practically constant (≅51%) along the typical year. With usual flat plate collectors, the calculated maximum values of the specific heat gain for January, March, May, July, September and November are 79, 143, 232, 247, 185 and 107 W/m2-collector, respectively, obtained at 13 or 14 h under a maximum temperature of about 100°C. © 1990.	en
heal.journalName	Solar and Wind Technology	en
dc.identifier.volume	7	en
dc.identifier.issue	2-3	en
dc.identifier.spage	111	en
dc.identifier.epage	118	en