Pressure drop in large volumetric heat storage tank radial plate diffuser

Abstract The seasonal heat storage tank is the most important component of the SDH system, which allows significant increase in the share of solar energy in heat supply in comparison with conventional solar systems with short-term accumulation of heat. The adverse impact of their investment sophistication on competitiveness may be compensated by the increased use. For example: Administrative cooperation with heat pump allows increasing the accumulation capacity of the seasonal heat storage tank. Such cooperetion causes the direct use of heating energy and the accumulation of cooling energy produced by heat punp in the final stage of the heating period. It can be used to remote cooling supplied buildings. Experimentation on mathematical models is possible to obtain valuable insights about the dynamics of the processes of charging and discharging in the seasonal storage tank and subsequently used in the design, implementation and operation.

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Air Conditioner with Latent Heat Storage Tank

Journal of the Society of Mechanical Engineers ◽

10.1299/jsmemag.116.1135_392 ◽

2013 ◽

Vol 116 (1135) ◽

pp. 392-393

Author(s):

Hideki TAKEBAYASHI ◽

Naomichi YANO

Keyword(s):

Latent Heat ◽

Storage Tank ◽

Heat Storage ◽

Air Conditioner ◽

Latent Heat Storage

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Volume Sizing for Thermal Storage With Phase Change Material for Concentrated Solar Power Plant

Volume 1: Combined Energy Cycles, CHP, CCHP, and Smart Grids; Concentrating Solar Power, Solar Thermochemistry and Thermal Energy Storage; Geothermal, Ocean, and Emerging Energy Technologies; Hydrogen Energy Technologies; Low/Zero Emission Power Plants and Carbon Sequestration; Photovoltaics; Wind Energy Systems and Technologies ◽

10.1115/es2014-6321 ◽

2014 ◽

Cited By ~ 2

Author(s):

Ben Xu ◽

Peiwen Li ◽

Cholik Chan

Keyword(s):

Power Plant ◽

Phase Change ◽

Phase Change Material ◽

Storage Tank ◽

Solar Power ◽

Heat Storage ◽

Storage System ◽

Thermal Storage ◽

Concentrated Solar Power ◽

Change Material

With a large capacity thermal storage system using phase change material (PCM), Concentrated Solar Power (CSP) is a promising technology for high efficiency of solar energy utilization. In a thermal storage system, a dual-media thermal storage tank is typically adopted in industry for the purpose of reducing the use of the heat transfer fluid (HTF). While the dual-media sensible heat storage system has been well studied, a dual-media latent heat storage system (LHSS) still needs more attention and study; particularly, the sizing of volumes of storage tanks considering actual operation conditions is of significance. In this paper, a strategy for LHSS volume sizing is proposed, which is based on computations using an enthalpy-based 1D model. One example of 60MW solar thermal power plant with 35% thermal efficiency is presented. In the study, potassium hydroxide (KOH) is adopted as PCM and Therminol VP-1 is used as HTF. The operational temperatures of the storage system are 390°C and 310°C, respectively for the high and low temperatures. The system is assumed to operate for 100 days with 6 hours charge and 6 hours discharge every day. From the study, the needed height of the thermal storage tank is calculated from using the strategy of tank sizing. The method for tank volume sizing is of significance to engineering application.

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Thermochemical energy storage – from fundamental research to TRL IV

E3S Web of Conferences ◽

10.1051/e3sconf/201910802013 ◽

2019 ◽

Vol 108 ◽

pp. 02013

Author(s):

Piotr Babiński ◽

Michalina Kotyczka – Morańska ◽

Jarosław Zuwała

Keyword(s):

Energy Storage ◽

Heat Carrier ◽

Storage Tank ◽

Storage Capacity ◽

Heat Storage ◽

Solid Medium ◽

Storage System ◽

Reversible Reactions ◽

Thermochemical Heat Storage ◽

Fundamental Research

The paper presents the results of the fundamental research devoted to the application of MgSO4 as a heat carrier for thermochemical seasonal storage system devoted for household application followed by the results of 35kWh storage tank (TRL IV) charging and discharging tests. Seasonal thermochemical heat storage, based on the reversible reactions of hydratation and dehydratation of a solid medium gives an opportunity to accumulate the energy with a storage capacity exceeding 300-400 kWh/m3.

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Energy Storage Start-up Strategies for Concentrated Solar Power Plants With a Dual-Media Thermal Storage System

Journal of Solar Energy Engineering ◽

10.1115/1.4030851 ◽

2015 ◽

Vol 137 (5) ◽

Cited By ~ 11

Author(s):

Ben Xu ◽

Peiwen Li ◽

Cho Lik Chan

Keyword(s):

Energy Storage ◽

Storage Tank ◽

Heat Storage ◽

Storage System ◽

Electrical Energy ◽

Thermal Storage ◽

Energy Output ◽

Concentrated Solar Power ◽

Start Up ◽

Hot Start

A concentrated solar power (CSP) plant typically has thermal energy storage (TES), which offers advantages of extended operation and power dispatch. Using dual-media, TES can be cost-effective because of the reduced use of heat transfer fluid (HTF), usually an expensive material. The focus of this paper is on the effect of a start-up period thermal storage strategy to the cumulative electrical energy output of a CSP plant. Two strategies—starting with a cold storage tank (referred to as “cold start”) and starting with a fully charged storage tank (referred to as “hot start”)—were investigated with regards to their effects on electrical energy production in the same period of operation. An enthalpy-based 1D transient model for energy storage and temperature variation in solid filler material and HTF was applied for both the sensible heat storage system (SHSS) and the latent heat storage system (LHSS). The analysis was conducted for a CSP plant with an electrical power output of 60 MWe. It was found that the cold start is beneficial for both the SHSS and LHSS systems due to the overall larger electrical energy output over the same number of days compared to that of the hot start. The results are expected to be helpful for planning the start-up operation of a CSP plant with a dual-media thermal storage system.

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