Design and Implementation of an Automatic Control for Two Axis Tracking System for Applications of Concentrated Solar Thermal Power

The present work presents design and implementation of an automated two-axis solar tracking system using local materials with minimum cost, light weight and reliable structure. The tracking system consists of two parts, mechanical units (fixed and moving parts) and control units (four LDR sensors and Arduino UNO microcontroller to control two DC servomotors). The tracking system was fitted and assembled together with a parabolic trough solar concentrator (PTSC) system to move it according to information come from the sensors so as to keep the PTSC always perpendicular to sun rays. The experimental tests have been done on the PTSC system to investigate its thermal performance in two cases, with tracking system (case 1) and without tracking system (case 2). The experimental results showed that the average solar radiation falling on the PTSC prototype in the two cases during the same time was 854 and 701 watt/m2, respectively, which means an increase in the solar radiation about 21.8 % when using tracking system. It was found that the average useful heat gain output of solar collector was equal to (376.2, 252.6 watt) for the two cases, respectively, so there was an increase of about 48.9 % when using the tracking system. Also, the average thermal efficiency of the PTSC was found to be (20.7, 26.5 %) for the two cases, respectively, which means an increase in the average efficiency by 28% with use of tracking system compared to the fixed case.

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Environmental Management Zoning of Coal-Fired Power Plants in China in the Context of Carbon Neutrality

10.20944/preprints202111.0068.v1 ◽

2021 ◽

Author(s):

Wen Qiu ◽

Mingxuan Zhao ◽

Lianhong Lv ◽

Hong Luo

Keyword(s):

Environmental Management ◽

Power Plants ◽

Thermal Power ◽

Quality Standard ◽

Human Society ◽

Environmental Capacity ◽

Economic Activities ◽

Carbon Neutrality ◽

Control Units ◽

And Control

The total amount of greenhouse gas emissions directly or indirectly generated by thermal power enterprises at any given time can be offset through afforestation, energy conservation and emission reduction. The present situation and control methods of CO2 emission in China's coal-fired thermal power industry are introduced. The complex ecosystem is a unity of ecological functions composed of human society, economic activities and natural conditions. In the context of carbon neutrality and based on the theory of composite ecosystem, this paper divides the coal-fired thermal power plants in China into environmental management zones, calculates the atmospheric environmental capacity, and puts forward the concept of regional atmospheric environmental capacity, classification and zoning control. Finally, the management and control units are classified, and differentiated management and control requirements are put forward to provide a reference for regional air quality standard planning.

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Desain dan Implementasi Maximum Power Solar Tracker Menggunakan Panel Photovoltaic di Kota Semarang

eLEKTRIKA ◽

10.26623/elektrika.v10i1.842 ◽

2019 ◽

Vol 10 (1) ◽

Author(s):

Harmini Harmini ◽

Titik Nurhayati

Keyword(s):

Solar Power ◽

Tracking System ◽

Servo Motor ◽

Photovoltaic Panel ◽

Design And Implementation ◽

Matlab Program ◽

Solar Tracker ◽

Online Tracking ◽

Solar Home System ◽

And Control

<span>The purpose of this research is to design and implementation Maximum Solar Power Tracking system using photovoltaic panel, in order to increase solar panel efficiency and power. Data collection is done for the condition in Semarang city. The result of the research is expected to be base in planning of solar power system in Semarang city, whether it is for lighting lamp planning and for Solar Home System (SHS). This MPPT system design uses standard 180 degree servo motor to drive photovoltaic panel and control circuit using ATmega IC, while simulation using MATLAB program. Tracking is done by online tracking method by moving the photovoltaic panel to the radiation of the sun. Tracking simulation is done with step 20, 50 and 180 step. The average of voltage generated by system without tracking is 3.97 Volt while the average voltage generated by tracking system is 4.72 Volt. Efficiency between system without tracking and tracking system is 66.28% for tracking system and 78.78% for tracking system</span>

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

Journal of University of Babylon for Engineering Sciences ◽

10.29196/jubes.v26i6.1437 ◽

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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Investigation of the thermal behavior and energy consumption of refrigeration systems

Thermal Science ◽

10.2298/tsci190213170k ◽

2019 ◽

pp. 170-170

Author(s):

Miklos Kassai

Keyword(s):

Energy Consumption ◽

Simulation Model ◽

Research Work ◽

Experimental Tests ◽

Transient Behavior ◽

Energy Performance ◽

Control Units ◽

Consumption Data ◽

Cold Store ◽

And Control

The object of this research study is to develop a thermal simulation model that can be used to investigate the thermal parameters of the refrigerant systems (with ON-OFF and PID control) used in cooling chambers. Moreover the model was further developed which takes into account also the types of compressors, feeder and control units used commonly in practice for energetic investigations. Using the measured energy consumption data obtained by experimental tests during the previous phase of this research work, the validation of the developed energy simulation model by MatLab R2016a could be also achieved with good agreement. MatLab software seemed to be the most appropriate tool for numerical investigations on the energy consumption of refrigeration systems used in commercial cold stores and transient behavior of the indoor air temperature of the cold store, cooling energy performance and consumed energy to the goods stored in cold store.

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Improving efficiency of thermal power plants through mine coal quality planning and control

Thermal Science ◽

10.2298/tsci170605209b ◽

2018 ◽

Vol 22 (1 Part B) ◽

pp. 721-733

Author(s):

Mirjana Bankovic ◽

Dejan Stevanovic ◽

Milica Pesic ◽

Aleksandra Tomasevic ◽

Ljiljana Kolonja

Keyword(s):

Power Plants ◽

Thermal Power ◽

Calorific Value ◽

Valuable Insight ◽

Mining System ◽

Coal Quality ◽

Planning And Control ◽

Control Units ◽

Continuous Mining ◽

And Control

The main goal of coal quality control in lignite mines is to supply coal to power plants within certain quality constraints. Coal properties can affect the efficiency, reliability, and availability of both the boiler and the emission control units. This paper presents a new based integrated mine process simulation approach to investigate the variability of the calorific value in exploitation a complex lignite deposits. Results provide valuable insight into the performance of a continuous mining system in terms of controlling coal quality variability.

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