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Abstract. Phase change materials (PCMs) are promising for storing thermal energy as latent heat, addressing power shortages. Growing demand for concentrated solar power systems has spurred the development of latent thermal energy storage, offering steady temperature release and compact heat exchanger designs. This study explores melting and
In this work, an experimental study on energy saving for air conditioning application has been conducted. Heat Pipe Heat Exchanger (HPHX) was installed between the fresh air and return air streams
Agyenim et al. designed an experimental energy storage system comprising a horizontal concentric pipe heat exchanger and studied a control system without enhanced heat transfer and a system with circular fins and longitudinal fins. The results showed that the system with longitudinal fins give the best performance with increased thermal response during
This paper reviews the use of heat pipes in conventional and rapid response PCM and liquid or cold storage applications and introduces some novel concepts that might
This article reports detailed investigation of using different Phase Change Materials (PCM) in various designs of Thermal Energy Storage (TES) Devices: specifically, heat exchanger. The focus is on the performance analysis of different types of heat exchangers acting as TES having various PCMs which are substantially reviewed in this paper.
The main heat transfer components of the heat storage device are the fin and heat pipe, and the rectangular heat storage box is constructed from an 8 mm PC board. The fin is attached to both sides of the flat micro heat pipe''s heat storage section using heat-conductive silica gel with a thermal conductivity of 2.0 W/(m·K).
Heat pipe coupled Latent Heat Thermal Energy Storage (LHTES) is a commonly used technique for improving heat storage, due to its advantages such as heat conduction, isothermal, and uniform temperature. Adding fins to the heat pipe can enhance energy storage efficiency and system performance.
Abbreviations: HP, heat pipe; HP-MF, heat pipe–metal foam; LHTES, latent heat thermal energy storage; MF, metal foam; PCM, phase change material. 2 of 12 Energy Storage, 2024 and with little temperature loss transmit heat across long dis-
A reliable transient heat transfer model is used to ascertain the effect of solar thermal energy storage on a geothermal system. The proposed closed loop system is comprised of a double pipe heat exchanger, and is supplied with
Latent heat thermal energy storage systems exhibit a significant performance over other thermal energy storage systems. The performance of these particular systems during melting/solidification is
The modification of the geometric configurations of heat transfer pipes in shell and tube Latent Heat Thermal Energy Storage (LHTES) systems not only enhances the melting process of the phase change material (PCM) but also improves the overall performance of these systems.
Typical heat pipe heat exchanger (HPHX) design goals are to maximize heat transfer rates and effectiveness (the ratio of the actual heat transfer rate to the maximum possible heat transfer rate) while minimizing cost, size, weight, pressure drop, and overall thermal resistance. High temperature latent heat thermal energy storage using heat
The paper presents experimental investigations to evaluate thermal performance of heat pipe using Nano Enhanced Phase Change Material (NEPCM) as an energy storage
The analysis of temperature profiles provides insights into heat transfer mechanisms: a radial increase in temperature typically indicates that convection is the predominant heat transfer
In this method, the ranking was given to the pareto-objectives based on maximizing or minimizing criteria. i.e., the heat release rate of pipe energy pile, heat flux per unit length of heat exchanger pipe, and soil excess temperature were ranked from higher to lower, whereas the total thermal resistance and energy consumed were ranked from lower to higher.
Loop heat pipe (LHP) encased in phase change material (PCM) incorporated annular to catalytic converter (CC) is proposed to augment the performance of the “thermal
A pipe loop is a pipe-in-pipe heat exchanger in which the cold fluid is pumped through the shell side and the oil is heated and pumped through the tube side. waste heat recovery, distillation, steam condensers, latent thermal energy storage (TES), district heating, and eco-friendly technologies like solar and geothermal energy have improved
A new thermal storage system, a heat pipe heat exchanger with latent heat storage, is reported. The new system may operate in three basic different operation modes, the charging only, the discharging only and the simultaneous charging/discharging modes, which makes the system suitable for various time and/or weather dependent energy systems.
Krishna et al. conducted experiments to predict the heat transfer characteristics of heat pipes for electronic cooling applications. They covered the adiabatic section of the heat pipe with a storage tank containing nano-enhanced phase change material (Al 2 O 3 and Tricosane). The evaporator temperature of the heat pipe was found to
A reliable transient heat transfer model is used to ascertain the effect of solar thermal energy storage on a geothermal system. The proposed closed loop system is comprised of a double pipe heat
This paper proposes a novel latent heat storage heat exchanger integrated heat supply and storage to address the intensity mismatch of renewable energy. Using experimental data in published literature validates the developed two-dimensional mathematical model.
The temperature of the heat transfer fluid (HTF; generally vapor or air) used for LTES in a concentrated solar power (CSP) system should be maintained between 250 °C and 500 °C (Michels and Pitz-Paal, 2007).Traditionally, alkali nitrate salts or chloride eutectic compositions, which have phase-change temperatures above 250 °C, have been used as
This paper provides an overview of the application of heat pipe heat exchangers, with a focus on the application in waste heat recovery, and analyzes the
This examination provides insights into the interactions between fin configurations and heat transfer fluids, contributing to a comprehensive understanding of their
A thermal network model is developed and used to analyze heat transfer in a high temperature latent heat thermal energy storage unit for solar thermal electricity generation. Specifically, the benefits of inserting multiple heat pipes between a heat transfer fluid and a phase change material (PCM) are of interest. Two storage configurations are considered; one with
Jung and Boo performed a numerical thermal modelling of a high temperature heat pipe heat exchanger under radiation. The heat pipe material was stainless steel charged with sodium. This has shown to be of great importance when employing heat pipes in thermal energy storage systems since heat pipes have high effective thermal
A thermal network model is developed and used to analyze heat transfer in a high temperature latent heat thermal energy storage unit for solar thermal electricity generation.
The heat pipe can transport heat over longer distances and connect devices which produce and use heat. Currently, this is limited to heat exchangers, nuclear reactors, and heating towers.. Heat pipes have a heat capacity of 1 MJ/°C.
Thermal energy storage: The role of the heat pipe in performance enhancement. Diao YH, Wang S, Li CZ, et al. Experimental study on the heat transfer characteristics of a
This issue affects the rate of energy storage (charging/discharging) in PCMs. Many researchers have proposed different methods to cope with this problem in
With the reduction in fossil fuels and growing concerns about global warming, energy has become one of the most important issues facing humanity. It is crucial to improve
A novel phase change thermal storage device based on micro heat pipe array with a more rational heat transfer structure was proposed in this study. 3D numerical models of the relative positions of different MHPAs to the heat transfer fluid channels were developed, and a comparative study was carried out.
A heat pipe based thermal energy storage heat exchanger can be successfully used to recover and reuse the wasted heat. Higher efficiency could be achieved by optimising the performance of the heat exchanger and selecting PCM with higher thermal conductivity. Experimental investigation of wraparound loop heat pipe heat exchanger used in
Experimental study on a pulsating heat pipe heat exchanger for energy saving in air-conditioning system in summer. Energy Build., 197 (2019), pp. 1-6, 10.1016/j.enbuild Numerical and experimental investigations of latent thermal energy storage device based on a flat micro-heat pipe array–metal foam composite structure. Renew. Energy
Thermal energy transport and conversion play a very significant role in more than 90% of energy technologies .This has recently attracted increasing interest related to thermal applications such as space and water heating, waste heat utilization, cooling and air conditioning .What appears to be going on today is the spread of a new generation of
Several studies have concentrated on enhancing LHTES systems by adding fins into the shell and tube PCM heat exchangers. Ajarostaghi et al. carried out a detailed computational analysis on shell-and-tube PCM storage featuring fins to improve thermal efficiency.They examined the effect of the number and configuration of HTF tubes, in addition to the number and placement
In this study, a novel system of cemented paste backfill body with coupled loop heat pipe heat exchanger (LHPHE-CPB) was proposed to augment the thermal conductivity of backfill body and enhance the extraction performance of geothermal energy in deep mines. Energy performance of seasonal thermal energy storage in underground backfilled
Meanwhile, latent heat thermal energy storage (LHTES) is classified as a high energy storage density that decreases the storage volume compared with sensible
Heat pipe coupled Latent Heat Thermal Energy Storage (LHTES) is a commonly used technique for improving heat storage, due to its advantages such as heat conduction,
In comparison with traditional heat exchangers, heat pipe heat exchangers indicate high compactness, a flexible arrangement, complete separation of hot and cold fluids, good isothermal operations, etc. As a result, heat pipe heat exchangers have attracted wide attention and application in various fields in recent years.
A heat exchanger is a device that can be used to transfer thermal energy between two or more fluids while keeping them isolated from each other. Heat exchangers can effectively recover heat from waste, thereby improving energy efficiency; heat exchangers are widely used in industry, construction, transportation, and other fields.
Heat pipes have been used extensively in a variety of energy storage systems. They are suited to thermal storage systems, in particular, in the role of heat delivery and removal, because of their high effective thermal conductivity and their passive operation.
The adoption of enhanced heat transfer techniques enhances the performance of the heat exchangers thereby enabling energy saving. The review paper is organized as follows: Section 2 explains the designs and constructions of double pipe, plate heat exchangers, and extended surface heat exchangers.
Double pipe and shell-and-tube are the commonly employed tubular heat exchangers in industries due to their operational flexibility and cost-effectiveness. Among these, double pipes are widely used for small-scale applications because of their simple design, operation, and maintenance .
Furthermore, Yang et al. proposed a gas–water heat exchanger based on micro-heat pipe technology for waste heat recovery. The effects of different inlet temperatures and air velocities on the heat exchange were analyzed experimentally.