Experimental and simulated optimization study on dynamic heat discharge performance of multi-units water tank with PCM

Jin, Li; Zhang, Yin; Ding, Peng; Long, Enshen

doi:10.1177/1420326x20961141

Cited by 13 publications

(6 citation statements)

References 33 publications

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“…The water in the cold storage tank has obvious stratification accounting for the lower flowrate in the cooling pipe of the STRC. Thus, the water in the cold storage tank can be divided into several layers, which can be calculated by equation (18) 34,40 where Q tank (W) is the net heat transfer rate of the water in the cold storage tank; M tank (kg/s) is the mass flowrate through the cold storage tank; and T tank (K) is the average temperature of the cold storage tank.…”

Section: Methodsmentioning

confidence: 99%

Optimization study on the performance of a thermosyphon-based radiative cooler

Yao

Zhang

Zhu

et al. 2022

Indoor and Built Environment

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By comparison with cool roofs, the cooling energy produced by radiative cooling can be stored in hybrid radiative cooling air conditioning (HRcAc) systems, which is more feasible for the application of radiative cooling. A thermosyphon mainly relies on buoyancy to drive the water circulating in a pipe without a pump and has been widely used in solar thermal collectors. Thus, more cooling benefits can be achieved by integrating a thermosyphon with HRcAc. This paper investigated the cooling performance of a thermosyphon-based radiative cooler (STRC). The STRC was modelled by using OpenModelica to derive the effects of structure parameters on the cooling performance. The optimized structure was determined according to the proposed optimization process. Finally, the cooling energy saving potential and economics for the application of the STRC in a single-floor family house in five climate zones of China were evaluated. The results show that the annual cooling electricity consumption can be reduced by 41%–56% and that the simple payback period for a single-floor family house with an optimized STRC in all five climate zones of China is between approximately 8.4 years and 10.5 years.

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Section: Methodsmentioning

confidence: 99%

Optimization study on the performance of a thermosyphon-based radiative cooler

Yao

Zhang

Zhu

et al. 2022

Indoor and Built Environment

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“…The validation of model results was conducted through visual analysis in the preceding article. To comprehensively expound the alignment between experimental and simulated results, we adopted the root mean square deviation (RMSD) and the coefficient of variation (CV) as evaluation metrics (Vogt et al, 2018;Li et al, 2020). The calculation formulas are expressed as:…”

Section: Evaluation and Validationmentioning

confidence: 99%

Modelling and onsite testing on dynamic thermal responses of built environment in passive solar rooms on Tibetan plateau

Zhang,

Han,

2024

Front. Energy Res.

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It of great importance in assessing built thermal environment level and evaluating corresponding indoor air conditioning demand for energy conservation in construction sectors. Nevertheless, because of the unique meteorological features in plateau area, classical building performance simulation approach contributes to thermal performance evaluation errors since most design codes or standards relies on low attitude regions. In this paper, a modified and improved dynamic thermal design model is put forward for built environment and energy consumption estimation for passive buildings for plateau buildings. Moreover, the simplified experiment is set up to monitor dynamic thermal responses for modelling building. The testing validation illustrate that the onsite measurement accuracy level is quite acceptable for engineering applications with less than 30% relative change range coefficient. Besides, the experiment data demonstrates that window-to-wall ratios, architectural orientation, thermal insulation coefficients, have substantial impacts for solar heat gains in plateau buildings. The study renders building design guidance for energy conservation in high altitude plateau areas.

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“…PCMs can be integrated into solar heating systems on roofs by using the existing roof construction as a thermal collector that minimizes the capital cost and introduces a latent thermal storage unit that minimizes the auxiliary energy requirement by storing excess solar energy for use in the absence of solar radiation. 73,74 Photovoltaic (PV) is another solar energy technology coupled with PCM and used in building roofs. It helps reduce the PV panel temperature, resulting in an increase in the amount of electricity produced.…”

Section: Pcm-enhanced Roofs and Ceilingsmentioning

confidence: 99%

Section: Pcm-enhanced Building Componentsmentioning

confidence: 99%

A conceptual framework for phase change material integration in building components

Ismail

Megahed

Eltarabily

2023

Indoor and Built Environment

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With the recent dramatic growth of the building sector’s energy consumption to provide thermal comfort to consumers, the constraints of climate change and the scarcity of energy supplies have necessitated a wiser and more effective reduction in the amount consumed. As a result, phase change materials (PCMs) have attracted much interest as latent heat thermal storage systems in recent decades. This paper aims to explain the possibility of using PCMs in buildings by establishing an overall conceptual framework for the processes of selecting and integrating PCMs in building sector applications. Moreover, it leads to a comprehensive matrix that identifies the best and most common type of material for each building’s component, as well as its temperature and thickness properties, its thermal impact, and the most popular integration techniques. The findings show paraffin as the major used type in all building components, while salt hydrate is employed in facades. The most prevalent incorporating technique is macro-encapsulation, which prevails in most building components with its direct effect on cooling and heating applications.

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Experimental and simulated optimization study on dynamic heat discharge performance of multi-units water tank with PCM

Cited by 13 publications

References 33 publications

Optimization study on the performance of a thermosyphon-based radiative cooler

Optimization study on the performance of a thermosyphon-based radiative cooler

Modelling and onsite testing on dynamic thermal responses of built environment in passive solar rooms on Tibetan plateau

A conceptual framework for phase change material integration in building components

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