Pressure drops, heat transfer coefficient, costs and power block design for direct storage parabolic trough power plants running molten salts

Lopes, Telma; Fasquelle, Thomas; Silva, Hugo

doi:10.1016/j.renene.2020.07.110

Cited by 18 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This study emphasizes the changes and concerns that are relevant to the replacement of thermic oils with molten salts such as the heat-transmitting coefficient, pressure declining, resistance-freezing solutions, energy bloc design, and price. The results demonstrated pressure declines in the solar domain are shorter running molten salts rather than thermic oil due to elevated temperature operating ranges 12 . Rao et al 26 created a unique thermodynamics prototype to replicate the reaction behaviours of basic and regeneration of CO 2 -TRC-based trough CSP techniques in the presence of diverse fog disturbances.…”

Section: Introductionmentioning

confidence: 93%

A novel dual feedwater circuit for a parabolic trough solar power plant

Al-Maliki

Alsaedi

Khafaji

et al. 2023

Sci Rep

View full text Add to dashboard Cite

The validated dynamic model of a parabolic trough power plant (PTPP) is improved by the combination of a new feedwater circuit (feedwater/HTF circuit) and a reference feedwater circuit (feedwater/steam circuit) as well as the development of the steam turbine model. Such design represents the first effort of research to utilize a dual feedwater circuit inside the PTPP to increase the power output in the daylight from 50 to 68 MWel and raise night operating hours at a lower cost. The purpose of increasing the operating night hours at a power (48 MWel) as in the reference PTPP is to get rid of the fossil fuel backup system and rely only on the absorbed solar energy and the stored energy in the molten salt. During daylight hours, the feedwater circuit is operated using Feedwater/HTF. In the transient period, the feedwater/HTF circuit will gradually be closed due to a decrease in solar radiation. Furthermore, the rest of the nominal feedwater mass flow rate (49 kg/s) is gradually replenished from the feedwater/steam circuit. After sunset, the entirety of the feedwater is heated based on the steam extracted from the turbine. The purpose of this improvement is to raise the number of nightly operational hours by reducing the nominal load from 61.93 to 48 MWel as a result of low energy demand during the evening hours. Therefore, a comparison study between the reference model and this optimization (optimization 2) is conducted for clear days (26th–27th/June and 13th–14th/July 2010) in order to understand the influence of dual feedwater circuit. The comparison indicates that the operational hours of the power block (PB) will be obviously increased. Moreover, this improvement reduces based on the fossil fuel system at night. As the last step, an economic analysis was performed on the costs of the referenced and the optimized PTPP as a function of the levelized energy cost (LEC). The results illustrate that the specific energy cost of a PTPP with 7.5 h of storage capacity is lowered by about 14.5% by increasing the output of the PTPP from 50 to 68 MWel.

show abstract

Section: Introductionmentioning

confidence: 93%

A novel dual feedwater circuit for a parabolic trough solar power plant

Al-Maliki

Alsaedi

Khafaji

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…e photothermal technology of the United States, Spain, and other countries is relatively mature, and the investment cost is lower than that in the early stage of industrial development [12]. References [13,14] used the system advisor model (SAM) simulation software to estimate the current and future costs of trough power plants and molten salt tower power plants in the U.S. power market. e prediction results show that the levelized cost of energy (LCOE) of the two power generation technologies will be reduced to 11 cents/kWh, which makes the cost of photothermal power generation competitive compared with the benchmark electricity price of California.…”

Section: Literature Reviewmentioning

confidence: 99%

Industrial Demand and Innovation: An Application of Binomial Regression Model to Project Statistics of NSFC of China

Chu²,

Shah

2022

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The carbon emission reduction potential of photothermal utilization of solar energy is outstanding, but the breakthrough of technology is closely related to the management of innovation and research in higher educational institutions. What factors affect such relationship is discussed in this paper. Based on the photothermal technology project data released by the National Natural Science Foundation of China (NSFC) and China education yearbook, this paper analyzes the variable relationship between the output of solar thermal technology innovation and industrial demand. Specifically, the negative binomial regression was constructed based on the technological project approval data. The results show that the input of scientific research resources has a key influence on the development of solar thermal technology, the establishment of technological projects or the subsequent patent application derived from technological projects. The results also show that the demand for photothermal technology and green innovation complement each other.

show abstract

“…They attained a 29.9% reduction in capital cost by implementing large aperture area PTCs with molten salt as both HTF and storage medium. Lopes et al [ 9 ] showed a 6.3% reduction in LCOE when applying the HitecXL molten salt in a 50 MWe/7.5 h–of–storage power plant. They simulated the plant performance using NREL's System Advisor Model (SAM) software.…”

Section: Introductionmentioning

confidence: 99%

A Novel Optimized Solar Trough Profile for Better Solar Energy Collection, Storage, and Levelized Cost

Shaaban

2022

Energy Tech

View full text Add to dashboard Cite

Clean and sustainable renewable energy resources provide a feasible solution for electrical power generation nowadays. This encourages many countries around the world to increase their renewable energy share. In a reference case, Egypt aims at increasing its renewable energy share in electricity generation from 9% in 2014 to 25% in 2030. [1] High rates of solar energy are available most of the year in Egypt. According to the solar atlas of Egypt, [2] the annual averaged direct normal irradiance (DNI) in Egypt is 292 W m À2 while the monthly averaged maximum DNI reaches 450 W m À2 . Moreover, Egypt has 2554 and 2208 kWh m À2 of available solar energy for concentrated solar power (CSP) and photovoltaic (PV), [2] respectively. Therefore, both the CSP and PV technologies are implemented in Egypt. While PV is cheaper than CSP, the latter is fully dispatchable. [3] Moreover, a PV with storage batteries is more expensive than a CSP with thermal energy storage (TES). [3] Therefore, recent investigations show that CSP and PV are complementary technologies rather than competitive ones. [3][4][5] However, Egypt has not integrated CSP and PV technologies in commercial power plants so far. CSP is a good choice for Egypt due to the high DNI and the hot climate conditions. Accordingly, Egypt has constructed a CSP plant in Kuraymat (100 km south of Cairo). The solar field in Kuraymat implements parabolic trough collectors (PTCs) with a total field aperture area of 130 800 m 2 . [6] Figure 1 shows the main components of the parabolic trough collector (PTC). A parabolic-shaped reflector collects the sun's rays and reflects them through a glass tube onto a receiver tube. The receiver tube absorbs the incident and reflected solar radiation and utilizes this energy to increase the temperature of a heat transfer fluid (HTF) that flows inside the receiver tube. The levelized cost of energy (LCOE) is one of the most significant parameters that indicate the feasibility of an electrical power generation technology. It is always desired to reduce the LCOE of every power generation technology to make it commercially competitive. Reducing the LCOE of the CSP plants with PTC technology can be attained by increasing the overall thermal efficiency while reducing the capital and running costs. El Hamdani et al. [7] estimated the impact of the DNI, solar multiple, mirrors efficiency, cycle efficiency, and absorber efficiency on the reduction of the LCOE of a 1MWe parabolic trough plant at different sites in Morocco. Aseri et al. [8] investigated the possibility of reducing the high capital cost of PTCs. They attained a 29.9% reduction in capital cost by implementing large aperture area PTCs with molten salt as both HTF and storage medium. Lopes et al. [9] showed a 6.3% reduction in LCOE when applying the HitecXL molten salt in a 50 MWe/7.5 h-of-storage power plant. They simulated the plant performance using NREL's System Advisor Model (SAM) software. [10] Tahir et al. [11] estimated the minimum LCOE for a 100 MW PTC power plant in six different ...

show abstract

Pressure drops, heat transfer coefficient, costs and power block design for direct storage parabolic trough power plants running molten salts

Abstract: Highlights Molten salts versus thermal oils as heat transfer fluids;  Molten salts show lower pumping electric consumption;  A minimum LCOE reduction of > 6% is expected with HitecXL;  Simpler power block for molten salt technology can be achieved.

Cited by 18 publications

References 16 publications

A novel dual feedwater circuit for a parabolic trough solar power plant

A novel dual feedwater circuit for a parabolic trough solar power plant

Industrial Demand and Innovation: An Application of Binomial Regression Model to Project Statistics of NSFC of China

A Novel Optimized Solar Trough Profile for Better Solar Energy Collection, Storage, and Levelized Cost

Contact Info

Product

Resources

About