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Journal ArticleDOI

Experiments on stratified chilled-water tanks

TLDR
In this paper, experimental studies on thermal stratification in chilled-water storage systems are presented, where a fibreglass storage tank in static and dynamic modes of operation is used, and the parameters varied are aspect ratio, flow rates, initial temperature difference and thickness of insulation.
Abstract
This paper presents experimental studies on thermal stratification in chilled-water storage systems. A fibreglass storage tank in static and dynamic modes of operation is used. The parameters varied are aspect ratio, flow rates, initial temperature difference and thickness of insulation. Emphasis is given to the effects of mixing at the inlet, leading to the definition of the mixing coefficient. The thermocline decay increases with the value of mixing coefficient, which is expressed as a function of Reynolds number and Richardson number.

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Journal ArticleDOI

Sustainable thermal energy storage technologies for buildings: A review

TL;DR: In this paper, the potential research studies pertaining to a variety of latent heat energy storage and cool thermal energy storage (CTES) systems solely dedicated for building heating, cooling and air conditioning (A/C) applications are reviewed.
Journal ArticleDOI

Recent advances in research on cold thermal energy storage

TL;DR: In this article, a review of recent literatures in the field of cold thermal energy storage (CTES) is presented and compared as for their merits and demerits, and suggestions for future research are provided.
Journal ArticleDOI

Methods to determine stratification efficiency of thermal energy storage processes – Review and theoretical comparison

TL;DR: In this paper, different methods have been proposed to characterize thermal stratification in energy storages from a theoretical point of view, focusing on the methods that can be used to determine the ability of a storage to promote and maintain stratification during charging, storing and discharging.
Journal ArticleDOI

Utilization of phase change materials in solar domestic hot water systems

TL;DR: In this article, phase change material (PCM) modules at the top of the water tank were added to give the system a higher storage density and compensate heat loss in the top layer.
Journal ArticleDOI

PCM-module to improve hot water heat stores with stratification

TL;DR: In this paper, the authors used a cylindrical PCM module at the top of the water tank to give the system higher storage density, and compensate heat loss in the top layer.
References
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Journal ArticleDOI

Parametric studies on thermally stratified chilled water storage systems

TL;DR: In this paper, the authors presented an analysis of the stratification decay in thermally stratified vertical cylindrical cool storage systems using a one dimensional conjugate heat conduction model.
Journal ArticleDOI

Theoretical and experimental studies of stratified thermocline storage of hot water

TL;DR: In this paper, a theoretical calculation of the degradation of heat in stratified thermocline storage has been carried out based on a conduction model, and the results indicate that heat conduction through the insulation to the ambient can be a larger loss mechanism than conduction across the thermocine, except in large diameter tanks with very heavy insulation.

Thermally stratified tanks

R L Cole, +1 more
TL;DR: It is shown how tanks fail to stratify and a new solar collection strategy is described that allows stratification to be maintained and most tanks can remain stratified in diurnal cycling.
Journal ArticleDOI

Analytical and experimental investigation of thermal stratification in storage tanks

TL;DR: In this paper, an analytical and experimental investigation of transient turbulent two-dimensional charging and discharging of a sensible heat storage tank has been conducted, and it was shown that turbulent mixing factor due to hydrodynamic disturbances at the inlet ports is the most significant item in the performance of thermal stratification storage tanks.
Journal Article

A numerical and experimental study of stratified thermal storage

TL;DR: In this paper, a one-dimensional, implicit, finite-difference model of a single stratified thermal storage tank has been developed, which covers variable flow rates for charging or discharging the thermal tank and conduction and turbulent mixing within the water for two different inlet configurations.
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