Simulation and experimental investigation of a thermal energy storage system for residential use

Βλαχογιάννης, Προκόπιος; Vlachogiannis, Prokopios

dc.contributor.author	Βλαχογιάννης, Προκόπιος	el
dc.contributor.author	Vlachogiannis, Prokopios	en
dc.date.accessioned	2020-10-13T08:48:03Z
dc.date.available	2020-10-13T08:48:03Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/51412
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.19110
dc.rights	Default License
dc.subject	Thermal energy storage residential use TRNSYS	en
dc.title	Simulation and experimental investigation of a thermal energy storage system for residential use	en
heal.type	bachelorThesis
heal.secondaryTitle	Μοντελοποίηση και πειραματική διερεύνηση συστήματος θερμικής αποθήκευσης ενέργειας για οικιακή χρήση	el
heal.classification	Θερμική Παραγωγή Ενέργειας σε ΑΗΣ ΙΙ	el
heal.access	campus
heal.recordProvider	ntua	el
heal.publicationDate	2020-07-23
heal.abstract	Environmental pollution and fuel depletion create the need of further penetration of renewables in industry, society as well as the building sector. The decarbonization of applications in buildings such as in the residential sector is crucial for the achievement of Europe goals to be climate-neutral by 2050. Especially solar energy technologies gain increasing interest, as the sun is an abundant source of energy. The aim of this diploma thesis is to study the implementation of a solar energy system coupled with thermal energy storage technologies on a single-family household to achieve at least 60% coverage of the heating and Domestic Hot Water (DHW) demand. The thesis is part of the SWSheating project under a Horizon2020 European initiative grant. The project’s goal is the development of an innovative seasonal thermal energy storage system that will allow the solar thermal energy harvested during the summer period, when solar energy is most abundant, to be used during the winter when energy demand peaks. As part of the project, the operation of a combi-storage thermally stratified water tank and its operation synergistically with a boiler back-up heating system is further studied. The combi-storage tank will operate as a means for diurnal thermal energy storage in such a way that the efficiency of the overall heating and DHW delivery system will be maximized. In addition, the back-up heating system will ensure user thermal comfort when the solar heat, provided directly or via storage means, is not adequate to cover the demand. The tank and back-up heating systems’ operation is studied both via simulation in the Transient System Simulation (TRNSYS) program and via experimental testing. The experimental test-rig is designed and developed within the context of this thesis in the Laboratory of Steam Boilers and Thermal Plants (LSBTP) of the National Technical University of Athens. The response of the system under different conditions and operation strategies is tested. The experimental results are obtained for DHW consumption with various boiler setpoints, tested on both worst-case conditions as well as on a daily consumption profile obtained by European standard. Combi-storage tank and space heating are also tested experimentally, and finally the tank’s and back-up system’s performance is evaluated for its capacity to meet both DHW, heating and charging demand. The experimental results are used to qualitatively validate the simulation model. Both simulation and experimental results show that the tank can be used as a combi-storage with the condition that the boiler is switched on at a specified setpoint ensuring the tank is always capable of providing the necessary supply for the user’s thermal comfort. In addition, the return of the DHW consumption must be regulated so that it does not cause thermal degradation of the space heating part of the tank. Moreover, the space heating supply from the tank can and must operate synergistically with the boiler to ensure the consumer’s needs are met. Finally, three improved design alternatives for the system are proposed, also integrating the solar panels as a heat source, which are to be simulated and experimentally validated in future work.	en
heal.advisorName	Καρέλλας, Σωτήριος	el
heal.committeeMemberName	Καρέλλας, Σωτήριος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Μηχανολόγων Μηχανικών. Τομέας Θερμότητας	el
heal.academicPublisherID	ntua
heal.numberOfPages	99 σ.	el
heal.fullTextAvailability	false