In the present thesis-work it has been analyzed the implementation of a district energy system with an important contribution of the sewage water through a vapour compression heat pump in the District IV of the city of Budapest, under the frame of the European project Heat4Cool which proposes an innovative, efficient and cost-effective solutions for the retrofit of HVAC systems. First, it has been made an overview of the current situation and the historical evolution of the district energy systems, the sewage water utilization and vapor compression heat pumps. Secondly it has been analyzed the climate of Budapest, to understand the conditions faced in the project. The buildings considered for the district energy systems have been defined and modelled with the software TRNsys in order to be able to define the energy needs through dynamic simulations. The energy system composed of sewage water heat exchanger and heat pump have been studied and calculated under the considered conditions. The final results have been compared with two different energy systems, air source heat pump and condensing boiler with chiller. The results showed a reduction of the 39% and 40% respectively in the annual energy cost of the three buildings.
In questo lavoro di tesi é stata analizzata l’implementazione di un sistema energetico distrettuale con un importante contributo di acque reflue per mezzo di una pompa di calore a compressione di vapore nel IV distretto della cittá di Budapest sotto la cornice del progetto europeo “Heat4Cool” che propone una soluzione innovativa, efficiente ed economica per il rinovamento di sistemi HVAC. Innanzitutto é stata fatta una panoramica della situazione attuale e dell’evoluzione storica dei sistemi energetici distrettuali, l’utilizzo delle acque reflue e delle pompe di calore a compressione di vapore. In seguito é stato analizzato il clima di Budapest, per capire le condizioni affrontate nel progetto. Gli edifici considerati per il sistema energetico distrettuale sono stati definiti e modellati con il software TRNsys per poter definire i bisogni energetici per mezzo di simulazioni dinamiche. Il sistema energetico composto dallo scambiatore di calore delle acque reflue e della pompa di calore, é stato studiato e calcolato nelle condizioni considerate. I risultati finali sono stati paragonati con due sistemi energetici differenti, la pompa di calore ad aria, e la caldaia a condensazione con refrigeratore. I risultati hanno mostrato rispettivamente una riduzione del 39% e del 40% nel costo energetico annuale dei tre edifici.
Energy analysis of a district heating and cooling system based on a sewage water heat recovery system
GARCÍA-MENACHO MANGLANO, ALFONSO
2017/2018
Abstract
In the present thesis-work it has been analyzed the implementation of a district energy system with an important contribution of the sewage water through a vapour compression heat pump in the District IV of the city of Budapest, under the frame of the European project Heat4Cool which proposes an innovative, efficient and cost-effective solutions for the retrofit of HVAC systems. First, it has been made an overview of the current situation and the historical evolution of the district energy systems, the sewage water utilization and vapor compression heat pumps. Secondly it has been analyzed the climate of Budapest, to understand the conditions faced in the project. The buildings considered for the district energy systems have been defined and modelled with the software TRNsys in order to be able to define the energy needs through dynamic simulations. The energy system composed of sewage water heat exchanger and heat pump have been studied and calculated under the considered conditions. The final results have been compared with two different energy systems, air source heat pump and condensing boiler with chiller. The results showed a reduction of the 39% and 40% respectively in the annual energy cost of the three buildings.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/141892