Energy and techno-economic assessment of the effect of the coupling between an air source heat pump and the storage tank for sanitary hot water production

Masip, Ximo; Cazorla-Marín, Antonio; Montagud, C.; Marchante, J.; Barcelo, F.; Corberán, José M.

doi:10.1016/j.applthermaleng.2019.113853

Cited by 15 publications

(4 citation statements)

References 13 publications

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“…This system adopts a variable-volume water level tank model, which facilitates the simulation of the direct heat water production mode and circulation heat preservation mode of the air-source heat pump hot water unit controlled by changes in the water level of the tank. The mathematical model of the variable-volume water tank can be simplified to a completely mixed variable-mass water, and the calculation method for describing the changes in the mass and internal energy of the water in the tank is as follows [25][26][27]:…”

Section: Mathematical Model Establishment (1) Mathematical Model Of T...mentioning

confidence: 99%

Research on Energy Savings of an Air-Source Heat Pump Hot Water System in a College Student’s Dormitory Building

Zeng

et al. 2023

Sustainability

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Centralized hot water systems are commonly installed in college student dormitories, representing a typical application for such systems. To achieve sustainable and environmentally friendly heating solutions, air-source heat pump hot water systems have gained attention for their high efficiency and energy-saving characteristics. By implementing heat pump technology, China could make significant progress towards achieving its carbon neutrality goals by reducing energy consumption and associated emissions. In this study, the heating performance of an air-source heat pump hot water system was tested in the field over the course of a year at a university in Chongqing, China. A simulation model was constructed using TRNSYS software, and a time-sharing control strategy was proposed to analyze the system’s operating characteristics and energy-saving performance. Results showed a 6% increase in unit annual average Coefficient of Performance (COP) and annual electricity savings of 10,027 kW·h, with an energy-saving rate of 8.77% after time-sharing control. The study highlights the significant economic and environmental benefits of adopting sustainable energy solutions, particularly in the context of increasing global greenhouse gas emissions.

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Section: Mathematical Model Establishment (1) Mathematical Model Of T...mentioning

confidence: 99%

Research on Energy Savings of an Air-Source Heat Pump Hot Water System in a College Student’s Dormitory Building

Zeng

et al. 2023

Sustainability

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“…Regarding the connection between the tank and the SHP, a direct connection has been considered in this study. The effects of an indirect connection could also be studied as it has been done in [36].…”

Section: Tes Tanksmentioning

confidence: 99%

Influence of the Thermal Energy Storage Strategy on the Performance of a Booster Heat Pump for Domestic Hot Water Production System Based on the Use of Low Temperature Heat Source

2020

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Energy recovery from a low temperature heat source using heat pump technology is becoming a popular application. The domestic hot water demand has the characteristic of being very irregular along the day, with periods in which the demand is very intensive and long periods in which it is quite small. In order to use heat pumps for this kind of applications efficiently, the proper sizing and design of the water storage tank is critical. In this work, the optimal sizing of the two possible tank alternatives, closed stratified tank and variable-water-volume tank, is presented, and their respective performance compared, for domestic hot water production based on low temperature energy recovery in two potential applications (grey water and ultra-low temperature district heating). The results show that the efficiency of these kind of systems is very high and that variable-water-volume tanks allow a better use of the energy source, with an 8% higher exergy efficiency and around 3% better seasonal performance factor (SPF), being able to provide similar comfort levels with a smaller system size.

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“…Sin embargo, los criterios de diseño que aborden el problema del reto energético desde el origen suponen el enclave científico que debe tomarse en cuenta para mejorar la eficiencia de las instalaciones (Rankin, R. & Rousseau, P.G., 2006). Así pues, ahorrar agua permite de forma proporcional ahorrar la energía utilizada para su calentamiento, aportando beneficios, ya no tanto económicos y muy importantes, sino ecológicos, por evitar la combustión, reduciendo la emisión de gases contaminantes y el efecto invernadero asociado, derivados todos ellos del consumo y obtención de otras energías, así como de su trasformación y/o combustión (Masip, X. et al, 2019). En la Tabla 1 se ha realizado una comparación entre algunos de los sistemas más empleados en la actualidad, y cuya representación se muestra en la Figura 4.…”

Section: Estado Del Conocimiento Actualunclassified

Sistema Automático de Recirculación de Agua Potable para su Aplicación en Instalaciones de Agua Caliente Sanitaria = Automatic Drinking Water Recirculation System for Application in Sanitary Hot Water Installations

Fernández

Gómez

Morón

et al. 2020

ADE

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Resumen-Diariamente se desperdicia una gran cantidad de agua potable al demandar agua caliente sanitaria en los distintos aparatos sanitarios de las viviendas. A este desperdicio de agua se suma a su vez un elevado consumo energético ocasionado al calentar el agua hasta la temperatura deseada. En este trabajo se ha desarrollado un nuevo sistema automático que interconecta los circuitos de agua fría y agua caliente, de manera que, al demandar esta última el sistema hace que recircule el agua fría contenida en la tubería de agua caliente y la suministrada por la caldera hasta que la temperatura del agua caliente alcanza un determinado valor de consigna de forma automática. Con esto se consigue evitar gran parte del derroche de agua potable y energía que, sistemáticamente, se produce en la actualidad. Además, se han llevado a cabo unas simulaciones sobre el consumo de agua en la Comunidad de Madrid, y se ha cuantificado el ahorro y la amortización que se consiguen empleando el sistema automático de recirculación desarrollado. Palabras Clave-Instalaciones; Agua Caliente Sanitaria (ACS); sistemas de recirculación; consumo energético.

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Energy and techno-economic assessment of the effect of the coupling between an air source heat pump and the storage tank for sanitary hot water production

Abstract: Energy and techno-economic assessment of the effect of the coupling between an air source heat pump and the storage tank for sanitary hot water production.

Cited by 15 publications

References 13 publications

Research on Energy Savings of an Air-Source Heat Pump Hot Water System in a College Student’s Dormitory Building

Research on Energy Savings of an Air-Source Heat Pump Hot Water System in a College Student’s Dormitory Building

Influence of the Thermal Energy Storage Strategy on the Performance of a Booster Heat Pump for Domestic Hot Water Production System Based on the Use of Low Temperature Heat Source

Sistema Automático de Recirculación de Agua Potable para su Aplicación en Instalaciones de Agua Caliente Sanitaria = Automatic Drinking Water Recirculation System for Application in Sanitary Hot Water Installations

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