Optimal design and operation of a central domestic hot water heat pump system for a group of dwellings employing low temperature waste heat as a source
| Autor: | Estefanía Hervas-Blasco, Emilio Navarro-Peris, José M. Corberán |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
020209 energy
02 engineering and technology TRNSYS Industrial and Manufacturing Engineering law.invention 020401 chemical engineering law Waste heat Heat exchanger 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Electrical and Electronic Engineering Process engineering Civil and Structural Engineering Energy recovery business.industry Mechanical Engineering Boiler (power generation) Building and Construction Pollution Sizing General Energy Storage tank MAQUINAS Y MOTORES TERMICOS Environmental science business Heat pump |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| Popis: | [EN] In this work, a study of an energy recovery system from a low-grade temperature source based on heat pumps for domestic hot water is done. The main components of the system are a pre-heating heat exchanger, an optimized heat pump for domestic hot water production, and a variable-volume storage tank. A model has been developed in TRNSYS to analyse the best configuration and control strategy of the system in order to satisfy the profile demands of 10, 20, and 30 multifamily houses, which are considered as a representative target market for this type of application. From this analysis, the influence of the design/sizing parameters on the system CO2 emissions has been obtained and a design criterium for their minimization has been supplied. Finally, a sensitivity analysis based on different net and heat source temperatures has been done in order to estimate the generalizability of the proposed solution. The obtained results show that this kind of system, with the proper design, sizing, and operation, offers potential CO2 emissions reductions by a factor of almost five compared to a conventional gas boiler system but a bad system selection could reduce this potential benefit up to 25%. Part of the work presented was carried out partially by Estefania Hervas Blasco with the financial support of a PhD scholarship from the Spanish government SFPI1500X074478XV0. The authors would also like to acknowledge the Spanish Ministerio de Economia y Competitividad through the project "Maximizacion de la Eficiencia y Minimizacion del Impacto Ambiental de Bombas de Calor para la Descarbonizacion de la Calefaccion/ACS en los Edificios Deconsumo Casi Nulo" with the reference ENE2017-83665-C2-1-P. Finally, this work has been also supported by the Universitat Politecnica de Valencia program ayuda a primeros Proyecto de investigacion through the project with reference SP20180039. |
| Databáze: | OpenAIRE |
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