Dynamic simulation and experimental validation of an open air receiver and a thermal energy storage system for solar thermal power plant

Li, Qing; Bai, Fengwu; Yang, Bei; Wang, Zhifeng; Hefni, Baligh El; Liu, Sijie; Kubo, Shuichi; Kiriki, Hiroaki; Han, Mingxu

doi:10.1016/j.apenergy.2016.06.056

Cited by 42 publications

(7 citation statements)

References 50 publications

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“…Thermal storage systems are already widely used with solar thermal systems so that the heat can be used after sunset. Thermal storage systems are used to reduce the mismatch between the supply and the demand of power [10]. Thermal storage systems such as Domestic Hot Water storage (DHW) is mandatory when solar system is used in heating up water [11].…”

Section: Thermal Storage Systemsmentioning

confidence: 99%

Assessment of a novel technology for a stratified hot water energy storage – The water snake

2018

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The increasing demand to enhance sustainability and reduce carbon emission and pollution is attracting the attention for implementing and integrating diverse heating technologies such as heat pumps, solar energy, gas boilers, Combined Heat and Power (CHP), and electric heaters. Integrated technologies for heating include low and high temperature district heating, domestic small-scale applications and commercial largescale buildings. Energy from flooded coalmines and water from other sources could also play a vital role in improving energy efficiency of heating and cooling applications. Stratified thermal storage are likely to significantly contribute to energy efficient heating, particularly when implementing a mixed-approach of diverse technologies. A stratified hot water tank, and naturally stratified reservoirs, are expected to play a central role in the integration of several heating technologies that operate efficiently at different levels of temperature with reduced cost. This paper presents a new innovative technology to improve stratification, namely 'the water snake', and an automated test rig to evaluate the new stratification method for energy utilisation using energy storage of hot water. An automated system is utilised to evaluate the performance. The results indicate that the test rig has been successful for the automated testing of the technology. Moreover, the results show that the water snake, as a new technology for stratification, is successful in minimising mixing and turbulence inside the thermal energy storage. The results prove that the technology could be implemented for a wide range of applications to enhance the efficiency of heating systems in buildings as well as district heating and cooling applications.

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Section: Thermal Storage Systemsmentioning

confidence: 99%

Assessment of a novel technology for a stratified hot water energy storage – The water snake

2018

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“…A Proportional-Integral (PI) controller was adopted to control the outlet temperature of receiver by adjusting mass flow through receiver according to Direct Normal Irradiance (DNI) change. Bai [16] developed one-dimensional dynamic models for a volumetric air receiver and a honeycomb ceramic sensible thermal storage using Modelica language. The two models were validated with experimental tests carried out at the Badaling Solar Thermal Power Experimental Site.…”

Section: Introductionmentioning

confidence: 99%

Dynamic simulation of a solar-hybrid microturbine system with experimental validation of main parts

et al. 2020

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“…Considerably, research studies were carried out to examine the performance of solar receivers in relation to solar thermal harvesting. The performance analysis of an open air receiver and a thermal energy storage system was carried out by Li et al They introduced a model study for the dynamic efficiencies of an open‐loop air receiver and a thermal energy storage unit. Energy and exergy efficiencies of a CSP system operating under different seasonal conditions were studied by Osorio et al They indicated that the recuperator, the hot thermal energy storage, and the solar receiver were identified as the main sources for exergy destruction with more than 70.0% of the total lost work in the plant.…”

Section: Introductionmentioning

confidence: 99%

A mobile thermal battery resembling a solar receiver: Innovative design and performance assessment

2018

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Summary An innovative design of a mobile thermal battery resembling the solar receiver is presented. A ternary salt mixture consisting of 52% KNO3, 18% NaNO3, and 30% LiNO3 by wt% is used as the thermal energy storing medium inside the thermal battery. Since the thermal conductivity of the ternary salt mixture is low, aluminum meshes are introduced to create a thermal conduction tree inside the thermal energy storing medium. The actual field data are used in the simulations to resemble the solar irradiation emanating from the parabolic trough and focusing onto the thermal battery outer surface. To improve the uniform heating at the outer surface, the thermal battery rotation along the centerline of the trough is considered. The temperature parameter is introduced to assess the uniform‐like temperature distribution inside the ternary salt mixture. It is found that the use of aluminum meshes improves the heat diffusion in the phase change material of the ternary salt mixture; in which case, it acts like a thermal conduction tree inside the thermal battery. The rotation of the thermal battery results in uniform‐like temperature distribution across the thermal battery cross section and suppresses the excessive temperature rise because of the local heating in the close region of the thermal battery outer surface.

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Dynamic simulation and experimental validation of an open air receiver and a thermal energy storage system for solar thermal power plant

Cited by 42 publications

References 50 publications

Assessment of a novel technology for a stratified hot water energy storage – The water snake

Assessment of a novel technology for a stratified hot water energy storage – The water snake

Dynamic simulation of a solar-hybrid microturbine system with experimental validation of main parts

A mobile thermal battery resembling a solar receiver: Innovative design and performance assessment

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