2024-03-29T06:41:06Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1848732023-12-11T10:33:18Zcom_10234_7035com_10234_9col_10234_8617
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Real Fernández, Antonio
author
Navarro-Esbrí, Joaquín
author
Mota-Babiloni, Adrián
author
Barragán Cervera, Angel
author
Doménech Ballester, Luis
author
Sánchez, Fernando
author
Maiorino, Angelo
author
APREA, CIRO
author
2019-09-24
Phase change materials (PCMs) can be used in refrigeration systems to redistribute the
thermal load. The main advantages of the overall system are a more stable energy performance,
energy savings, and the use of the off-peak electric tariff. This paper proposes, models, tests, and
analyzes an experimental water vapor compression chiller connected to a PCM thermal energy
storage (TES) tank that acts as an alternative heat sink. First, the transient model of the chiller-PCM
system is proposed and validated through experimental data directly measured from a test bench
where the PCM TES tank is connected to a vapor compression-based chiller. A maximum deviation
of 1.2 ◦C has been obtained between the numerical and experimental values of the PCM tank water
outlet temperature. Then, the validated chiller-PCM system model is used to quantify (using the
coefficient of performance, COP) and to analyze its energy performance and its dependence on the
ambient temperature. Moreover, electrical energy saving curves are calculated for different ambient
temperature profiles, reaching values between 5% and 15% taking the experimental system without
PCM as a baseline. Finally, the COP of the chiller-PCM system is calculated for different temperatures
and use scenarios, and it is compared with the COP of a conventional aerothermal chiller to determine
the switch ambient temperature values for which the former provides energy savings over the latter.
REAL FERNÁNDEZ, Antonio; NAVARRO-ESBRÍ, Joaquín; MOTA-BABILONI, Adrián; BARRAGÁN CERVERA, Ángel; DOMÉNECH BALLESTER, Luis; SÁNCHEZ, Fernando; MAIORINO, Angelo; APREA, Ciro (2019). Modeling of a PCM TES Tank Used as an Alternative Heat Sink for a Water Chiller. Analysis of Performance and Energy Savings. Energies (2019), v. 12, issue 19
http://hdl.handle.net/10234/184873
https://doi.org/10.3390/en12193652
Phase change material
Thermal energy storage
Vapor compression system
HVAC
Energy efficiency
Modeling of a PCM TES Tank Used as an Alternative Heat Sink for a Water Chiller. Analysis of Performance and Energy Savings