scholarly journals Heat Transfer Fluid Temperature Control in a Thermoelectric Solar Power Plant

Energies ◽  
2017 ◽  
Vol 10 (8) ◽  
pp. 1078 ◽  
Author(s):  
Lourdes Barcia ◽  
Rogelio Peon ◽  
Juan Díaz ◽  
A.M. Pernía ◽  
Juan Martínez
Keyword(s):  
Heat Transfer ◽  
Power Plant ◽  
Temperature Control ◽  
Solar Power ◽  
Heat Transfer Fluid ◽  
Fluid Temperature ◽  
Solar Power Plant

scholarly journals Nonlinear Adaptive Control of Heat Transfer Fluid Temperature in a Parabolic Trough Solar Power Plant

Energies ◽  
2017 ◽  
Vol 10 (8) ◽  
pp. 1155 ◽  
Author(s):  
Antonio Nevado Reviriego ◽  
Félix Hernández-del-Olmo ◽  
Lourdes Álvarez-Barcia
Keyword(s):  
Heat Transfer ◽  
Adaptive Control ◽  
Power Plant ◽  
Solar Power ◽  
Heat Transfer Fluid ◽  
Fluid Temperature ◽  
Solar Power Plant ◽  
Parabolic Trough ◽  
Nonlinear Adaptive Control

scholarly journals Comparative Modeling of a Parabolic Trough Collectors Solar Power Plant with MARS Models

Energies ◽  
2017 ◽  
Vol 11 (1) ◽  
pp. 37 ◽  
Author(s):  
Jose Rogada ◽  
Lourdes Barcia ◽  
Juan Martinez ◽  
Mario Menendez ◽  
Francisco de Cos Juez
Keyword(s):  
Heat Transfer ◽  
Water Vapor ◽  
Power Plant ◽  
Solar Radiation ◽  
Thermal Energy ◽  
Power Plants ◽  
Solar Power ◽  
Rankine Cycle ◽  
Heat Transfer Fluid ◽  
Solar Field

Power plants producing energy through solar fields use a heat transfer fluid that lends itself to be influenced and changed by different variables. In solar power plants, a heat transfer fluid (HTF) is used to transfer the thermal energy of solar radiation through parabolic collectors to a water vapor Rankine cycle. In this way, a turbine is driven that produces electricity when coupled to an electric generator. These plants have a heat transfer system that converts the solar radiation into heat through a HTF, and transfers that thermal energy to the water vapor heat exchangers. The best possible performance in the Rankine cycle, and therefore in the thermal plant, is obtained when the HTF reaches its maximum temperature when leaving the solar field (SF). In addition, it is necessary that the HTF does not exceed its own maximum operating temperature, above which it degrades. The optimum temperature of the HTF is difficult to obtain, since the working conditions of the plant can change abruptly from moment to moment. Guaranteeing that this HTF operates at its optimal temperature to produce electricity through a Rankine cycle is a priority. The oil flowing through the solar field has the disadvantage of having a thermal limit. Therefore, this research focuses on trying to make sure that this fluid comes out of the solar field with the highest possible temperature. Modeling using data mining is revealed as an important tool for forecasting the performance of this kind of power plant. The purpose of this document is to provide a model that can be used to optimize the temperature control of the fluid without interfering with the normal operation of the plant. The results obtained with this model should be necessarily contrasted with those obtained in a real plant. Initially, we compare the PID (proportional–integral–derivative) models used in previous studies for the optimization of this type of plant with modeling using the multivariate adaptive regression splines (MARS) model.

scholarly journals A Comparison Study on the Improved Operation Strategy for a Parabolic trough Solar Power Plant in Spain

2021 ◽  
Vol 11 (20) ◽  
pp. 9576
Author(s):  
Wisam Abed Kattea Al-Maliki ◽  
Adnan G. Tuaamah Al-Hasnawi ◽  
Hasanain A. Abdul Wahhab ◽  
Falah Alobaid ◽  
Bernd Epple
Keyword(s):  
Power Plant ◽  
Solar Power ◽  
Storage System ◽  
Simulation Software ◽  
Plant Performance ◽  
Heat Transfer Fluid ◽  
Solar Power Plant ◽  
Operation Strategy ◽  
Parabolic Trough ◽  
Control Circuits

The present work focuses on the development of a detailed dynamic model of an existing parabolic trough solar power plant (PTSPP) in Spain. This work is the first attempt to analyse the dynamic interaction of all parts, including solar field (SF), thermal storage system (TSS) and power block (PB), and describes the heat transfer fluid (HTF) and steam/water paths in detail. Advanced control circuits, including drum level, economiser water bypass, attemperator and steam bypass controllers, are also included. The parabolic trough power plant is modelled using Advanced Process Simulation Software (APROS). An accurate description of control structures and operation strategy is necessary in order to achieve a reasonable dynamic response. This model would help to identify the best operation strategy due to DNI (direct normal irradiation) variations during the daytime. The operation strategy used in this model has also been shown to be effective compared to decisions made by operators on cloudy periods by improving power plant performance and increasing operating hours.

Analytical assessment of a concentrated solar sub-critical thermal power plant using low temperature heat transfer fluid

2020 ◽  
pp. 0958305X2092159
Author(s):  
Umish Srivastva ◽  
K Ravi Kumar ◽  
RK Malhotra ◽  
SC Kaushik
Keyword(s):  
Heat Transfer ◽  
Power Plant ◽  
Thermal Efficiency ◽  
Thermal Power Plant ◽  
Solar Power ◽  
Thermal Power ◽  
Capital Cost ◽  
Shared Responsibility ◽  
Heat Transfer Fluid ◽  
Concentrated Solar Power

The paper presents energy–exergy–economic–environment–ethics analysis of a concentrated solar thermal power plant. Design basis of a concentrated solar power for 24 h operation on parabolic trough collector technology in best suited direct normal irradiation location and least capital cost analysis has been presented. An unconventional approach of reducing the capital cost is analyzed by intentionally designing the power plant for sub-critical conditions using a low-cost mineral oil with permissible operating temperature of 320°C in place of the conventional synthetic solar grade oil of 400°C. Using low pressure and temperature steam in the plant, it has been shown that while there is a reduction of 0.1% in energetic efficiency, there is a gain of 0.28% in the exergetic efficiency of the solar power plant conditions, gross thermal efficiency decreases by 1.18% and the net thermal efficiency decreases by 2.91%. However, the energetic and exergetic utilization factor for heat transfer fluid is increased by 0.84 and 5.58%, respectively. By suitably adjusting the solar field configuration and inlet oil temperature, energy savings to the tune of 45% is possible apart from 2.5 times of cost saving. An attempt has been made to quantifiably assess the ethics of switching to renewable electricity through shared responsibility as a novelty in the study. The payback period for the investment has also been shown to reduce from 20 years to 5 years assuming that the carbon price increases, concentrated solar power cost comes down by 25%, and cost at which electricity can be sold increases to US $0.14 (Rs. 10) per unit.

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