Energy and Exergy Analyses of an Open Thermochemical Energy Storage System: Methodology and Illustrative Application

Abedin, Ali Haji

doi:10.2174/1876387101205010041

Cited by 8 publications

(8 citation statements)

References 10 publications

(9 reference statements)

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“…It is selected due to its higher rate of thermal conductivity Moreover, the dimensional requirements and the rate of heat produced by the component also plays a vital role in the implementation of the thermal storage system . The usage of thermal storage greatly improved the overall cost effectiveness, plant downtime during the operational condition and the usage of the steam …”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analyses of the solar assisted multigeneration system with thermal energy storage system

Ratlamwala

Gill

2019

Energy Storage

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The following analysis has been conducted to investigate the energy and exergy efficiencies of solar assisted multigeneration system, the system comprises of parabolic trough solar collector, thermal energy storage tank, regenerative power plant, double effect absorption cooling system, and PEM electrolyzer. The variation in energy and exergy efficiencies of the parabolic solar trough collector with respect to solar absorptivity is also shown in the analysis. The heat transfer rate, the resultant outputs, the efficiencies, and the rate of exergy destructions for each component are calculated. The freshwater is used as the primary working fluid for the overall cycle and the net power produced by the low-pressure turbine is 1.384 MW, additionally, the rate of heat produced by the thermal storage tank is 205.7 kW and the calculated thermal efficiency of the thermal storage tank is 14.33%. The overall analysis has been done by using engineering equation solver and parametric results are shown in order to determine the variations in the system. K E Y W O R D Sdouble effect vapor absorption chiller system, proton exchange membrane electrolyzer plant, regenerative power cycle, solar assisted multigeneration system, thermal storage system

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Section: Introductionmentioning

confidence: 99%

Energy and exergy analyses of the solar assisted multigeneration system with thermal energy storage system

Ratlamwala

Gill

2019

Energy Storage

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“…Finally, the kinetics of adsorption may also affect the efficiency of the storage process. Indeed the rate at which the adsorbate is retained on the adsorbent surface will impact the heat and mass transport during adsorption, in relation with the thermal conductivity and specific heat capacity of the adsorbent used, composition and temperature of the inlet gas, type of the adsorbent bed, as well as the reactor dimensions [ 13 , 57 , 76 , 77 ]. With a fixed bed adsorption process in an open sorption system using air as the carrier gas, the temperature distribution at different positions within the reactor and, what is most important in view of space heating applications, the rate of adsorbate depletion in the outflowing air and the temperature variations of the latter are kinetics-sensitive technical characteristics.…”

Section: Practical Aspects Of Heat Storage By Adsorption In Referementioning

confidence: 99%

“…The existing technologies for short-term thermal energy storage in building applications are mature and robust enough to manage the daily mismatch between the energy supply and demand [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. For any method of thermal storage, high-temperature solar energy is used in the initial step (i.e., charging step ) to drive the underlying reactions or phenomena in the endothermic direction.…”

Section: Introductionmentioning

confidence: 99%

“…Reversible adsorption of vapours onto high surface area solids actually appears to be the most promising alternative for thermochemical energy storage, especially in view of space heating uses. It is certainly worth noting here the first practical use of 7000 kg of zeolite 13X beads in energy storage on district heating net in Munich to store about 4680 MJ (i.e., 1300 kWh) during off-peak hours for the subsequent heating of a school building [ 13 , 14 ]. Two examples of solid materials (i.e., silica gel and zeolite) considered for the purpose of thermochemical heat storage by adsorption are given in Table 1 ; their physical properties and storage performances are compared with those of representative materials used in thermal energy storage.…”

Section: Introductionmentioning

confidence: 99%

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A Critical Review of Solid Materials for Low-Temperature Thermochemical Storage of Solar Energy Based on Solid-Vapour Adsorption in View of Space Heating Uses

Salles

Zając

2019

Molecules

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The present report deals with low-temperature thermochemical storage for space heating, which is based on the principles of vapour adsorption onto solid adsorbents. With the aim of obtaining comprehensive information on the rationalized selection of adsorbents for heat storage in open sorption systems operating in the moist-air flow mode, various materials reported up to now in the literature are reviewed by referring strictly to the possible mechanisms of water vapour adsorption, as well as practical aspects of their preparation or their application under particular operating conditions. It seems reasonable to suggest that, on the basis of the current state-of-the-art, the adsorption phenomenon may be rather exploited in the auxiliary heating systems, which provide additional heat during winter’s coldest days.

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“…The transfer of technology from research to industry has been successfully accomplished by implementing the principle of energy storage by heat of water adsorption onto zeolites in daily heating of a school building in Munich [10]. In comparison with such a shortterm energy storage, the technical feasibility of seasonal storage is subject to some inherent limitations.…”

Section: Introductionmentioning

confidence: 99%

Ionosilica-based anion exchangers for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation

Wu¹,

Hesemann²,

Trens³

et al. 2020

Chemical Engineering Journal

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Three ionosilica materials have been tested for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation. The previous synthesis procedures were adapted to prepare materials possessing an organosilica framework with silylated cationic blocs and Cl-, HSO4-, SO4 2anions in various proportions as extra-framework compensating counter-ions. Transmission and Scanning Electron Microscopy, Wavelength Dispersive X-Ray Fluorescence, Energy Dispersive X-ray Spectroscopy, Thermogravimetric analysis, adsorption of gaseous nitrogen at 77 K, 29 Si Solid-State Nuclear Magnetic Resonance spectroscopy were employed to establish the key characteristics of the three ionosilica samples in terms of elemental composition, particle morphology and textural properties, thermal stability and regenerability, or variability of surface activity during repeated hydrationdehydration cycles. Their capacity to adsorb water vapor at cool and moderate ambient temperatures after incomplete surface drying was demonstrated by means of the scanning microscopy operating in low-vacuum mode at 275 K, or more precisely by measuring the water adsorption isotherms at 313 K and the related differential heats under static conditions. Finally, flow calorimetry operating in the moist-gas flow mode was used to measure the integral heat accompanying the adsorption of water vapor at its partial pressure of 2.8 kPa and 296 K as well as the kinetics of heat release in three drying-saturation cycles. After a drying procedure carried out under helium flow at 353 K, the thermal performance of two ionosilica samples containing both HSO4and SO4 2counter-ions was sufficient enough to consider them as potential adsorbents for auxiliary space heating in homes, small businesses, or public buildings.

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Energy and Exergy Analyses of an Open Thermochemical Energy Storage System: Methodology and Illustrative Application

Cited by 8 publications

References 10 publications

Energy and exergy analyses of the solar assisted multigeneration system with thermal energy storage system

Energy and exergy analyses of the solar assisted multigeneration system with thermal energy storage system

A Critical Review of Solid Materials for Low-Temperature Thermochemical Storage of Solar Energy Based on Solid-Vapour Adsorption in View of Space Heating Uses

Ionosilica-based anion exchangers for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation

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