A heat transfer simulation study of a multi-compartment isothermal liquid foodstuff tank tested according to the international ATP Agreement

Chatzidakis, SK; Chatzidakis, KS

dc.contributor.author	Chatzidakis, SK	en
dc.contributor.author	Chatzidakis, KS	en
dc.date.accessioned	2014-03-01T01:21:43Z
dc.date.available	2014-03-01T01:21:43Z
dc.date.issued	2005	en
dc.identifier.issn	0196-8904	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16338
dc.subject	ATP Agreement	en
dc.subject	ATP re-approval test Ci	en
dc.subject	Isothermal tank	en
dc.subject	Refrigerated transport	en
dc.subject	Thermal analysis	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Mechanics	en
dc.subject.classification	Physics, Nuclear	en
dc.subject.other	Computer simulation	en
dc.subject.other	Food products	en
dc.subject.other	Isotherms	en
dc.subject.other	Specific heat	en
dc.subject.other	Temperature measurement	en
dc.subject.other	Thermoanalysis	en
dc.subject.other	Thyristors	en
dc.subject.other	ATP agreement	en
dc.subject.other	ATP re-approval test	en
dc.subject.other	Isothermal tanks	en
dc.subject.other	Perishable foodstuffs	en
dc.subject.other	Refrigerated transport	en
dc.subject.other	Heat transfer	en
dc.title	A heat transfer simulation study of a multi-compartment isothermal liquid foodstuff tank tested according to the international ATP Agreement	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.enconman.2004.02.016	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.enconman.2004.02.016	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	Isothermal tanks are widely used for transport of perishable liquid foodstuffs like milk, wine, juice etc., and according to the international ATP Agreement, they have to be tested periodically in officially recognized national ATP Test Stations to ensure that they meet the specifications. The testing of a multicompartment isothermal tank presents special difficulties in comparison to the testing of a refrigerated truck because of the number of compartments that have to be measured. The instrumentation needed for testing a specimen in these cases is complex and that is why only a few ATP Test Stations can conduct such tests. In this study, a heat transfer numerical simulation is described of a multi-compartment isothermal tank for the transport of perishable liquid foodstuffs tested at a new environmental ATP chamber recently constructed at the Zografou Campus of the National Technical University in Athens. The tests were conducted according to the regulations specified in the United Nations ATP Agreement. A transient finite difference model is developed for a typical specimen multi-compartment isothermal tank tested inside an ATP Testing Chamber. To adjust the cooling or heating system, a PI controller is used. The simulation results are compared to experimental measurements under real conditions and show good agreement. The study describes also a method for testing multi-compartment isothermal tanks according to the ATP specifications using only the measuring equipment normally existing in every ATP laboratory. With the proposed method, the testing of a three compartment liquid foodstuff tank is possible using only one heating capacity adjuster, e.g. one PI controller and one thyristor instead of the three independent PI controllers and three thyristors normally needed in order to adjust the required heating capacity inside each compartment. (C) 2004 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Energy Conversion and Management	en
dc.identifier.doi	10.1016/j.enconman.2004.02.016	en
dc.identifier.isi	ISI:000224606300003	en
dc.identifier.volume	46	en
dc.identifier.issue	2	en
dc.identifier.spage	197	en
dc.identifier.epage	221	en