Thermal Storage for Solar Power Plants

Geyer, Michaël

doi:10.1007/978-3-642-61245-9_6

Cited by 13 publications

(8 citation statements)

References 7 publications

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“…274,275 Concrete can be formed into bricks and arranged in a packed bed configuration or HTF pipes can be set to run through large concrete blocks. 260,276 Work has been performed to develop concretes with better thermal properties, and which are compatible with finned HTF heat exchanger designs. 271 Concretes and castable ceramics have been developed with volumetric heat capacities greater than 0.7 kWh th /m 3 /K.…”

Section: Sensible Storagementioning

confidence: 99%

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Concentrating Solar Power

et al. 2015

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Concentrating solar power (CSP) is a reliable and wellknown form of solar power. Nine solar trough plants producing more than 400 megawatts (MW) of electricity have been operating reliably in the California Mojave Desert since the 1980s. With a renewed sense of urgency to commercialize renewable energy sources, the U.S. Department of Energy (DOE) is ramping up its CSP research, development, and deployment efforts. These efforts, which are leveraging both industry partners and the national laboratories, are directed toward the development of parabolic trough, dish/engine, and power tower CSP systems.

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Section: Sensible Storagementioning

confidence: 99%

“… a Material properties are representative values from within operating temperature range. Values are from ref unless noted otherwise. …”

Section: Thermal Energy Storagementioning

confidence: 99%

Concentrating Solar Power

et al. 2015

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“…Finally the proton exchange membrane electrolyzer is proposed in the system, the high amount of power for electrolyzer is supplied from the low pressure turbine and hence the liquid hydrogen is obtained as the final product, the H 2 is highly flammable in both liquid and gaseous state, and it will be used as most advanced and efficient fuel in nearby future, another great benefit for using combustible hydrogen fuel is that it is eco‐friendly . As there are various methods, to obtaining liquefied H 2 but the proton exchange membrane (PEM) electrolyzer is the more efficient system for producing liquefied H 2 , because it has numerous benefits, such as low environmental impact rate and it is easy to maintain …”

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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“…Potassium nitrate (KNO3) has a reported melting temperature range of 333 -337 o C and latent heat of fusion ranging from 91 -98.9 kJ/kg in the literature [18,28,36,37]. Geyer [38] reported a latent heat of fusion of 266 kJ/kg. This value is different from all the values reported in the literature.…”

Section: Economic Requirements Low Specific Cost and Availabilitymentioning

confidence: 99%

Review of PCMS and heat transfer enhancement methods applied in parabolic trough solar plants thermal storage systems

Muhammad¹

2018

Nig. J. Tech.

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Solar thermal power generation requires a cost effective thermal storage system. The existing two tank system is very expensive due to the storage material inventory. The use of phase change materials (PCMs) offers higher storage density. A review of potential PCMs was conducted in order to come up with commercially available ones having suitable properties. Most available PCMs have low thermal conductivity making heat transfer enhancement necessary for power applications. The various methods of heat transfer enhancement in latent heat storage systems were also reviewed systematically. The review showed that three commercially-available PCMs are suitable in the operating temperature range of parabolic trough plants. Many heat transfer enhancement methods have been investigated in the literature but the use of aluminium fins is the most promising in the temperature range of 250-330 o C. Many eutectic mixtures of materials have potential for use but discrepancies exist in their reported melting temperature and latent heat of fusion.Keywords: Latent heat, high temperature, thermal conductivity enhancement 1. INTRODUCTION Solar thermal power generation is one the most sustainable and renewable source of electricity. It has the potential of fulfilling the world's electricity needs due to the availability of solar energy in sufficient quantity in various regions of the world [1 -3]. Various solar thermal technologies have been developed over the years for the generation of electricity [4]. The parabolic dish [5 -7] power tower [8,9] and the parabolic trough [10 -12] are the most advanced and have been commercialized. The parabolic trough technology using synthetic oil as the heat transfer fluid (HTF) with operating temperature range between 290 and 400 o C is the most matured and cost effective technology for capacities <200 MW. This can partly be attributed to the experience gained in the operation and maintenance of the 354 MW Solar Electric Generating Station (SEGS) plants for over two (2) decades [4,13]. Most commercial solar plants in operation and under construction are of the parabolic trough technology [9]. The stable and sustainable operation of a solar thermal plant requires a back-up thermal energy source in order to produce thermal energy when that from the sun is insufficient. For cost effective operation there is also the need to avoid energy wastage when the

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Thermal Storage for Solar Power Plants

Cited by 13 publications

References 7 publications

Concentrating Solar Power

Concentrating Solar Power

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

Review of PCMS and heat transfer enhancement methods applied in parabolic trough solar plants thermal storage systems

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