Numerical analysis of the combination of radiative collectors and emitters to improve the performance of water-water compression heat pumps under different climates

Vilà, Roger; Medrano, Marc; Castell, Albert

doi:10.1016/j.energy.2022.126445

Cited by 1 publication

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Goldstein et al [16] showed electricity savings up to 21% in an office building when a heat pump was combined with radiative cooling. In 2023, Vilà et al [17] presented a study that simulated different configurations of RCE coupled with heat pumps, where the RCE produced cold during the night in combination with the heat pump, while during the day the RCE was decoupled and used to produce DHW independently by means of solar heating. The study examined various cities and climates and found an improvement in the system performance.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Radiative Collectors and Emitters (AD-RCE) to Improved the Efficiency of Heat Pumps

Medrano

Vilà

Monterrubio

et al. 2023

36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 20

View full text Add to dashboard Cite

A Radiative Collector and Emitter (RCE) is a device which combines solar collection and radiative cooling functionalities to provide both heat and cold from renewable sources. In solar collection mode, fluids are heated up using the incoming solar radiation. In radiative cooling mode, it takes advantage of the atmospheric window transparency to dissipate infrared radiation towards the outer space at nights, allowing to cool down fluids circulating through it. However, the heat production of the RCE is about 10 times higher than the cold production, and the cold water can only be produced a few degrees below ambient temperature (4-8 ºC). An evolution of the RCE, the adaptive RCE (ad-RCE) is capable to adapt its behaviour to the energy requirements, producing either heat or cold during daytime, as well as cold during night-time. To further enhance the cooling potential, we suggest coupling the ad-RCE with a compression heat pump (HP) that utilizes the cold produced by the ad-RCE as a heat sink for the condenser. In this study, we numerically estimate the performance of a water-to-water compression heat pump coupled with an ad-RCE. Our results indicate a yearly average improvement of the coefficient of performance (COP) of 3.89%, which translates to an annual electricity savings of 3.70%.

show abstract

Section: Introductionmentioning

confidence: 99%