scholarly journals An Investigation of Hybrid Solar-Steam Power Plant: A case study in Iraq

2020 ◽  
Vol 10 (4) ◽  
pp. 199-216
Author(s):  
Dr. Karima Esmail Amori ◽  
Randa Rashid Sari
Keyword(s):  
Power Plant ◽  
Solar Collector ◽  
Thermal Power ◽  
Working Fluid ◽  
Feed Water ◽  
Outlet Temperature ◽  
Parabolic Trough ◽  
Flow Rates ◽  
Parabolic Trough Solar Collector ◽  
Side Flow

 In this work integrating Al-Zubaydia (Kut-Iraq) thermal power plant with solar thermal system is studied for heating feed water by solar energy to reduce fuel consumption and greenhouse gases emission. A closed type Parabolic Trough Solar Collector (PTSC) is designed, constructed, instrumented, and tested. Its thermal characteristics are reported under Iraq climate conditions for the period extended from June, to September 2017. The collector heat gain, efficiency, absorber temperature and heat exchanger effectiveness (considered as feed water heater) were presented for absorber side flow rates of (0.15, 0.2, 0.3, 0.4, 0.5) lpm of water or oil), and shell side water flow rates of (0.4, 0.5, 0.6lpm). Results show that the maximum obtained thermal efficiency of parabolic trough solar collector was 83.33% for oil working fluid. The maximum obtained oil outlet temperature was 106 oC at solar noon for (0.15) lpm. Theoretical results showed that the fuel save mode needs collector area of (32842 m2), while that needed for power boosting is (102569 m2) for the same thermal cycle efficiency. The fuel save mode reported a reduction in greenhouse emission.

scholarly journals THERMAL PERFORMANCE OF PARABOLIC TROUGH SOLAR COLLECTOR

2018 ◽  
Vol 18 (3) ◽  
pp. 389-404
Author(s):  
Karima E Amori ◽  
Randa R Sari
Keyword(s):  
Solar Collector ◽  
Tracking System ◽  
Outlet Temperature ◽  
Parabolic Trough ◽  
Heat Gain ◽  
Flow Rates ◽  
Climate Conditions ◽  
Mass Flow Rates ◽  
Parabolic Trough Solar Collector ◽  
System Water

 This work presents design, instrumented and test of a parabolic trough solar collectorunder Baghdad climate conditions (of latitude 33.33o N, of longitude 44.4oE). The parabolictrough solar collector consists of: a mirror matrix or tapes which work as reflective surfaceof (2m *1m), absorber copper tube (receiver), two axis tracking system. Water is used as aheat transfer medium. The setup is tested within clear days from June, to September 2017.The collector heat gain, efficacy and temperature of absorber were presented for absorberfive different circulating mass flow rates of (0.15, 0.2, 0.3, 0.4, 0.5) 1pm. The results showthat the maximum thermal efficiency of the parabolic trough solar collector is 80.26%. Themaximum outlet temperature of the absorber tube reaches 81 oC at the noon when waterflows at (0.15) 1pm. The maximum obtained heat gain is (1619W) for (0.5) 1pm flow rate ofwater.

scholarly journals Sensitive Analysis for the Efficiency of a Parabolic Trough Solar Collector Based on Orthogonal Experiment

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Xiaoyan Liu ◽  
Jing Huang ◽  
Qianjun Mao
Keyword(s):  
Thermal Efficiency ◽  
Solar Collector ◽  
Orthogonal Experiment ◽  
Cold Climate ◽  
Inlet Temperature ◽  
Outlet Temperature ◽  
Parabolic Trough ◽  
Pipe Length ◽  
Climate Region ◽  
Parabolic Trough Solar Collector

A multitude of the researches focus on the factors of the thermal efficiency of a parabolic trough solar collector, that is, the optical-thermal efficiency. However, it is limited to a single or double factors for available system. The aim of this paper is to investigate the multifactors effect on the system’s efficiency in cold climate region. Taking climatic performance into account, an average outlet temperature of LS-2 collector has been simulated successfully by coupling SolTrace software with CFD software. Effects of different factors on instantaneous efficiency have been determined by orthogonal experiment and single factor experiment. After that, the influence degree of different factors on the collector instantaneous efficiency is obtained clearly. The results show that the order of effect extent for average maximal deviation of each factor is inlet temperature, solar radiation intensity, diameter, flow rate, condensation area, pipe length, and ambient temperature. The encouraging results will provide a reference for the exploitation and utilization of parabolic trough solar collector in cold climate region.

Determination of Parabolic Trough Solar Collector Efficiency Using Nanofluid: A Comprehensive Numerical Study

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Hamidreza Khakrah ◽  
Amir Shamloo ◽  
Siamak Kazemzadeh Hannani
Keyword(s):  
Renewable Energy ◽  
Solar Collector ◽  
Volume Fraction ◽  
Numerical Study ◽  
Working Fluid ◽  
Inlet Temperature ◽  
Parabolic Trough ◽  
Metallic Nanoparticle ◽  
Velocity Magnitude ◽  
Parabolic Trough Solar Collector

Due to significant reduction in fossil fuel sources, several researches have been conducted recently to explore modern sources of renewable energy. One of the major fields in the category of renewable energy harnessing devices is parabolic trough solar collector (PTC). Several parameters have effect on the overall efficiency of the PTCs. As the effect of these parameters is coupled to each other, a comprehensive investigation is necessary. In the present study, a numerical analysis is performed to examine the efficiency of PTCs via variation of several governing parameters (e.g., wind velocity magnitude, nanoparticles volume fraction, inlet temperature, and reflector's orientation). A detailed set of absorber, reflector, and protection glass in addition to the surrounding environment is modeled to capture sufficiently accurate data. The working fluid is assumed to be nanofluid to inspect the advantage of metallic nanoparticle addition to the base fluid. The Monte Carlo radiation tracing method is utilized to calculate the solar gain on the absorber tube. According to the obtained results, the efficiencies are reduced by 1–3% by rotating the reflector by 30 deg relative to wind direction. Moreover, 14.3% and 12.4% efficiency enhancement is obtained by addition of 5% volume fraction of Al2O3 to the base synthetic oil for horizontal and rotated reflectors, respectively.

Technological investigations and efficiency analysis of a steam heat exchange condenser: conceptual design of a hybrid steam condenser

2008 ◽  
Vol 19 (3) ◽  
pp. 35-45 ◽  
Author(s):  
R.K. Kapooria ◽  
S. Kumar ◽  
K.S. Kasana
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Steam Pressure ◽  
Working Fluid ◽  
Feed Water ◽  
Steam Power ◽  
Analysis And Design ◽  
Steam Power Plant ◽  
Steam Power Plants

Most of the electricity being produced throughout the world today is from steam power plants. At the same time, many other competent means of gener-ating electricity have been developed viz. electricity from natural gas, MHD generators, biogas, solar cells, etc. But steam power plants will continue to be competent because of the use of water as the main working fluid which is abundantly available and is also reusable. The condenser remains among one of the key components of a steam power plant. The efficiency of a thermal power plant depends upon the efficiency of the condenser. In this paper, a the-oretical investigation about thermal analysis and design considerations of a steam condenser has been undertaken. A hybrid steam condenser using a higher surface area to diameter ratio of cooling a water tube has been analyzed. The use of a hybrid steam condenser enables higher efficiency of the steam power plant by lowering condenser steam pressure and increasing the vacuum inside the con-denser. The latent/sensible heat of steam is used to preheat the feed water supply to the boiler. A con-ceptual technological design aspect of a super vacu-um hybrid surface steam condenser has been theo-retically analyzed.

Mechanical Analysis and Structural Optimization of the Parabolic Trough Solar Collector

2013 ◽  
Vol 579-580 ◽  
pp. 916-923
Author(s):  
Jian Ping Liu ◽  
Bang Yan Ye ◽  
Guan Xun ◽  
Ya Ping Shi
Keyword(s):  
Structural Optimization ◽  
Solar Collector ◽  
Thermal Power ◽  
Mechanical Analysis ◽  
Wind Load ◽  
Static Characteristic ◽  
Computational Formula ◽  
Parabolic Trough ◽  
Static Performance ◽  
Parabolic Trough Solar Collector

Parabolic trough solar thermal power generation system is always restricted by high drive torque, low thermal efficiency and high investment cost. In this paper, the parabolic trough solar collector in a solar energy application base is taken as the research object and FEM was used to realizing its structural light-weighting design. The structural overall performance is improved to lay a foundation for innovating drive mode and expanding the rotation scope. Beginning of the paper, the wind load characteristic was analyzed and its computational formula was provided the magnitude of wind load was computed; then, the static performance of the solar collector was analyzed by using ANSYS Workbench and the worst working condition of each static characteristic was confirmed to service for the later structural optimization; last, the overall optimization scheme of the solar collector was put forward, the position of the reflectors supporting point and the structure of the solar collectors cantilever was optimized.

scholarly journals Performance Improvement of the Parabolic Trough Solar Collector Using Different Types of Fluids with Numerical Simulation

2018 ◽  
Vol 26 (6) ◽  
pp. 332-347
Author(s):  
Saad T. Hamidi ◽  
Fikrat A.K. Fattah ◽  
Mohammed S. Ghanam
Keyword(s):  
Solar Collector ◽  
Tracking System ◽  
Experimental Tests ◽  
Working Fluid ◽  
Distilled Water ◽  
Parabolic Trough ◽  
Solar Concentrators ◽  
Engineering Department ◽  
Useful Heat ◽  
Parabolic Trough Solar Collector

Solar concentrators are an important facility to utilize the solar energy. There are many kinds of solar concentrators. In this work  an experimental has been implemented to improve the thermal performance of Parabolic Trough Solar Collector (PTSC) using three different fluids as a working fluid (water, nanoparticles of  CuO  mixed with distilled water nanoparticles of   mixed with  distilled water) with concentration ratio 0.01% and mass flow rate 20Lt/hr without tracking system. The experimental tests have been carried out in electro-mechanical engineering department at university of technology in Baghdad city during October 2017 and daytime between (9am -15pm) hours. The obtained results for three different fluids are as follows:  - Using (CuO + distilled water) as a working fluid increases the average of the output temperatures by 10.4%,  the average of useful heat gains   increases  by 11%  and the average of the collector efficiencies increases by15%.    - Using ( +distilled water) as a working fluid increased the average of output temperatures by 4%, the average of useful heat gains is increased by 6.5% and the average of collector efficiencies is increased by 8.2%.  

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