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Hot sanitary water production with CO2 heat pumps: Effect of control strategy on system performance and stratification inside the storage tank

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Hot sanitary water production with CO2 heat pumps: Effect of control strategy on system performance and stratification inside the storage tank

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dc.contributor.author Tammaro, Marcello es_ES
dc.contributor.author Mauro, A. W. es_ES
dc.contributor.author Montagud Montalvá, Carla Isabel es_ES
dc.contributor.author Corberán Salvador, José Miguel es_ES
dc.contributor.author Mastrullo, R. es_ES
dc.date.accessioned 2017-06-13T09:00:11Z
dc.date.available 2017-06-13T09:00:11Z
dc.date.issued 2016-05-25
dc.identifier.issn 1359-4311
dc.identifier.uri http://hdl.handle.net/10251/82711
dc.description.abstract [EN] In this work three different control strategies for the production of sanitary hot water by means of an electric heat pump working with CO2 are investigated. The heat pump is a prototype, here modelled in the vapour-compression software package IMST-ART. By simulating this model, the performance of the heat pump is correlated to the boundary conditions and is scaled to different sizes, namely 1, 1.5, and 2 times larger than the reference system. After having chosen an application for which the load profile of sanitary hot water during the year is known, these heat pumps are simulated in a TRNSYS16 model where the production of sanitary hot water and the consumption are buffered by the presence of a tank. Key parameter in guaranteeing comfort and good performance of the system is the stratification inside the storage tank. The size of the tank necessary to keep a certain level of comfort at the user is then determined through a parametric analysis for each size of the heat pump. The energetic performance is also evaluated for each system in terms of seasonal performance factor. Then, the results obtained are compared with a different system where the heat pump is equipped with an inverter and the circulation pump follows a different control logic. The size of the tank and the seasonal performance factor are therefore determined in this case too. Moreover, a night&day control logic is compared to these first two options to have a baseline of comparison in terms of volume of storage needed to guarantee a same level of comfort and performance. To provide information also on the running costs, a parametric analysis was run varying the type of control, the heat pump and the tank sizes for different load profiles. The results show that the size of the heat pump has a significant effect on the comfort of the user, which usually leads to oversizing of the storage tank when the load profile is unknown. With regard to this, the results obtained for the alternative control system show a 20% reduction of the volume of the tank, given a certain level of comfort, and is therefore useful to reduce the size of the storage tank. es_ES
dc.description.sponsorship The study related to thiswork has been partially supported by the FP7 European project ‘Next Generation of Heat Pumpsworkingwith Natural fluids’ (NxtHPG) Grant agreement no: 307169. The work of M. Tammaro on electric heat pumps is financially supported by Universita degli Studi di Napoli Federico II throughthe FP7 European project 'Next Generation of Heat Pumps working with Natural fluids' (NxtHPG). en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Applied Thermal Engineering es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Storage tank control es_ES
dc.subject Sanitary hot water es_ES
dc.subject Heat pump es_ES
dc.subject Parametric analysis es_ES
dc.subject Cost es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Hot sanitary water production with CO2 heat pumps: Effect of control strategy on system performance and stratification inside the storage tank es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.applthermaleng.2016.01.094
dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/307169/EU es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials es_ES
dc.description.bibliographicCitation Tammaro, M.; Mauro, AW.; Montagud Montalvá, CI.; Corberán Salvador, JM.; Mastrullo, R. (2016). Hot sanitary water production with CO2 heat pumps: Effect of control strategy on system performance and stratification inside the storage tank. Applied Thermal Engineering. 101:730-740. doi:10.1016/j.applthermaleng.2016.01.094 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.1016/j.applthermaleng.2016.01.094 es_ES
dc.description.upvformatpinicio 730 es_ES
dc.description.upvformatpfin 740 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 101 es_ES
dc.relation.senia 305952 es_ES
dc.contributor.funder European Commission


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