Show simple item record

dc.contributorDobrovicescu, Alexandru
dc.contributor.authorFemenia Pons, Caterina
dc.date.accessioned2015-04-28T16:38:37Z
dc.date.issued2014
dc.identifier.urihttp://hdl.handle.net/2099.1/25913
dc.description.abstractThe project deals with the optimization of refrigeration and thermal systems in order to minimize the total yearly cost represented by the sum between the operating cost and the investment cost. Therefore, an exergoeconomic analysis of thermal systems has been performed. Exergoeconomics represent the union between thermodynamic analysis of irreversible processes and economics. Exergy concept is the only measure that accounts for both quantity and quality of a specific form of energy. Unlike of energy, exergy is consumed in a productive process and that is the reason why it can be a part of an economic balance. The choice of the optimal temperature difference in the heat exchangers of a refrigeration system has been found for the optimization. Afterwards it has been applied in the organic Rankine cycle. To point out only the net effect of the temperature differences in the evaporator and condenser, an efficiency has been introduced as the ratio between a Carnot cycle operating between the temperatures of condensation and evaporation and another one operating between the temperatures of the environment and the cold chamber. The exergy destructions in the compressor and the throttling valve have been neglected in this phase, so they have been given by the exergetic efficiency of the specific zone. Thus, the exergetic efficiency of the global system is calculated as the product between the efficiency of the cycle with only the heat transfer exergy destruction and the efficiency accounting only the destructions of the compressor and the throttling valve. Both terms represent the objective function that minimize the operating and investment cost.
dc.language.isoeng
dc.publisherUniversitat Politècnica de Catalunya
dc.publisherUniversity Politehnica of Bucarest
dc.subjectÀrees temàtiques de la UPC::Energies::Termoenergètica::Refrigeració
dc.subjectÀrees temàtiques de la UPC::Física::Termodinàmica
dc.subject.lcshExergy
dc.subject.lcshThermodynamics
dc.subject.lcshEnergy conservation
dc.subject.lcshRefrigeration and refrigerating machinery
dc.titleOptimation of refrigeration and orc systems
dc.typeBachelor thesis
dc.subject.lemacExergia
dc.subject.lemacTermodinàmica
dc.subject.lemacEnergia -- Estalvi
dc.subject.lemacRefrigeració i màquines frigorífiques
dc.rights.accessRestricted access - author's decision
dc.date.lift10000-01-01
dc.audience.educationlevelGrau
dc.audience.mediatorEscola Tècnica Superior d'Enginyeria Industrial de Barcelona
dc.contributor.covenanteeUniversitatea Politehnică București
dc.description.mobilityOutgoing


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder