scholarly journals Design and Experimental Investigation of Portable Solar Thermoelectric Refrigerator

2017 ◽  
Vol 14 (1) ◽  
Keyword(s):  
Economic Analysis ◽  
Thermoelectric Module ◽  
Electrical Energy ◽  
Heat Sinks ◽  
Maintenance Cost ◽  
Solar Pv ◽  
Cold Surface ◽  
Electric Power Supply ◽  
Heating And Cooling ◽  
Solar Powered

The aim of this project is to design a portable solar thermoelectric refrigerator for people living in remote areas, or outdoor applications where electric power supply is absent. The design of the solar-powered refrigerator based on the principle of the thermoelectric module to create a hot side and cold side. Solar PV module is used to supply electrical energy to the thermoelectric module to generate hot and cold effects for heating and cooling application. A wellinsulated rectangular container made of aluminum is used as a cooling chamber. To enhance the cooling effect, heat sinks and electric fans are added to the hot side to cool down the thermoelectric modules. The system was able to reach 40 C in the cold surface of the TEM and 100 C as the refrigerant temperature and 300 C in hot chamber with 0.66 COP. An economic analysis is carried out to study the viability of this novel technique. Economic analysis reveals that the system has sufficient amount of saving due to renewable source of energy which is free and lower maintenance cost. One more major advantages of the proposed refrigerator is its longer lifetime that might reach up to 40 years

scholarly journals Experimental Study to Analyze Feasibility of a Novel Panelized Ground-Source Thermoelectric System for Building Space Heating and Cooling

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 209
Author(s):  
Rui Miao ◽  
Xiaoou Hu ◽  
Yao Yu ◽  
Qifeng Zhang ◽  
Zhibin Lin ◽  
...  
Keyword(s):  
Thermoelectric Module ◽  
Electrical Energy ◽  
Building Envelope ◽  
Coefficient Of Performance ◽  
Conventional Heating ◽  
Peltier Effect ◽  
Space Heating ◽  
Heating And Cooling ◽  
Ground Source ◽  
Ground Loop

A thermoelectric module is a device that converts electrical energy into thermal energy through a mechanism known as the Peltier effect. A Peltier device has hot and cold sides/substrates, and heat can be pumped from the cold side to the hot side under a given voltage. By applying it in buildings and attaching it to building envelope components, such as walls, as a heating and cooling device, the heating and cooling requirements can be met by reversing the voltage applied on these two sides/substrates. In this paper, we describe a novel, panelized, ground source, radiant system design for space heating and cooling in buildings by utilizing the Peltier effect. The system is equipped with water pipes that are attached to one side of the panel and connected with a ground loop to exchange heat between the cold/hot sides of the thermoelectric module and the underground region. The ground loop is inserted in boreholes, similar to those used for a vertical closed-loop Ground Source Heat Pump (GSHP) system, which could be more than a hundred meters deep. Experiments were conducted to evaluate the feasibility of the developed panel system applied in buildings. The results show that: (1) the average cooling Coefficients Of Performance (COP) of the system are low (0.6 or less) even though the ground is used as a heat sink, and thus additional studies are needed to improve it in the future, such as to arrange the thermoelectric modules in cascade and/or develop a new thermoelectric material that has a large Seebeck coefficient; and (2) the developed system using the underground region as the heat source has the potential of meeting heating loads of a building while maintaining at a higher system coefficient of performance (up to ~3.0) for space heating, compared to conventional heating devices, such as furnaces or boilers, especially in a region with mild winters and relatively warm ground.

scholarly journals Design, Analysis and Development of Solar-Powered Electric Bi-Cycle for domestic use

2019 ◽  
Vol 4 (2) ◽  
pp. 54-58
Author(s):  
Karam Abou Saleh ◽  
R. V. Murali
Keyword(s):  
Solar Energy ◽  
Power Transmission ◽  
Electric Energy ◽  
Electrical Energy ◽  
Solar Pv ◽  
Pv Cell ◽  
Cell Components ◽  
Domestic Use ◽  
Solar Powered ◽  
Emission Of Greenhouse Gases

Nowadays a greater number of people use cars or other automobiles as a means of transportation between places and the number of such vehicles is increasing day by day on the roads. Moreover, people are driving their cars for every need even if the location he/she is heading to is really near and can be taken by a walk. On the other hand, with respect to different researches that driving cars is having an impact on the environment and it is affecting the ozone layer due to the emission of greenhouse gases from the vehicles so providing a transport that supports the environment such as solar-powered e-bike is an affordable solution for our society particularly for the near distances. This paper presents the design and development aspects of solar powered bi-cycle. The key phases of this work include designing a solar energy cell converting solar energy into useable electric energy and designing a power transmission system suitable for driving a conventional bi-cycle. These phases involve calculation of power requirements to drive the bi-cycle and redesign of transmission elements of bi-cycles suitable to the solar energy power source and suitably select PV cell components to meet these requirements. The electrical motor type and capacity are decided on the basis of the above calculations and the motor is connected to the bi-cycle through suitable chain drive system. Solar PV cell capacity of 40 W with area dimensions of 54 x 51 cm is used to generate electrical energy and the same is used to charge the batteries as well. The maximum voltage recorded is 24 volts and the maximum current generated is 12 Amperes. Various parts of the assembly are integrated into the bi-cycle and the working model was completed. Finally, the testing of the bi-cycle was performed to obtain the results based on which an engineering analysis and cost details were carried out. The fabricated model and the results obtained thus prove that there is a potential scope to introduce the solar-integrated electric bikes into the market for domestic use.

scholarly journals Development of a Solar Powered DC Drive for Rickshaw

2021 ◽  
Vol 2 (2) ◽  
pp. 38-46
Author(s):  
David O. Agbo ◽  
Irene U. Ukazu ◽  
Gabriel A. Igwue
Keyword(s):  
Solar Energy ◽  
Electrical Energy ◽  
Dc Motor ◽  
Solar Pv ◽  
Power Sources ◽  
Voltage Range ◽  
Dc Motor Control ◽  
Dc Drive ◽  
Left And Right ◽  
Solar Powered

The solar powered DC drive for a rickshaw is an automobile that uses solar energy to drive a DC motor, which in turn move a rickshaw. Due to the challenge of global warming, it has become necessary to make use of power sources that are environmentally friendly or renewable energy. Solar energy is used as the energy source in this design because it is cheap, clean and readily available during the day. This paper employed the use of solar PV which converts the solar energy into electrical energy. The electrical energy generated by the solar PV comes in the rated value of 12 V or 24 V which increases or decreases beyond this rated values depending on the sun intensity. To make use of the varying solar PV voltage, there is need to either buck (stepdown) or boost (step up) or buck-boost (stepdown-step up) the PV voltage to a constant voltage value. Since 12 V DC drive is used, it is required to step up or step down from the voltage range of 10 V to 25 V to 12 V via a buck-boost converter to power the 12 V DC drive. The DC motor control was implemented by embedding the functions of vehicle control in the system. The functions are; run, stop or break, left and right. This function makes the DC drive to control the rickshaw as vehicle. The results shows that rickshaw can be control and driven as a vehicle using solar energy.

scholarly journals Enhancement the Efficiency of Solar PV by Increasing Rate of Heat Transfer

2019 ◽  
Vol 5 (6) ◽  
pp. 10
Author(s):  
Anil Khatri ◽  
Prof. Nitin Tenguria
Keyword(s):  
Electrical Energy ◽  
Solar Panel ◽  
Heat Sinks ◽  
Back Surface ◽  
Solar Pv ◽  
Solar Panels ◽  
Air Velocity ◽  
Steady State Temperature ◽  
Extended Surfaces ◽  
Cooling Methods

As the future progresses, many companies and industries are striving to achieve a “greener” approach to energy production by using solar energy. Solar panels that use PV cells (semiconductor devices used to convert light into electrical energy) are popular for converting solar power into electricity. One of the problems in using PV cells to extract energy from sunlight is the temperature effect on PV cells. As the solar panel is heated, the conversion efficiency of light to electrical energy is diminished. Because solar panels can be expensive, it is important to be able to extract as much energy as possible. The proposes cooling methods for the panel in order to achieve optimum efficiency. To achieve this, various cooling methods have been proposed. A bare solar panel with no air velocity was used as a base model. This was tested and compared to bare solar panels cooled by heat sinks, in the form of extended surfaces such as plate fins that can be mounted on the back surface of solar panels. Results showed that the heat sinks were only marginally effective; they resulted in a steady-state temperature of only a few degrees less than a solar panel without a heat sink. Due to these results, it is proposed that pump cooling would be far more beneficial. With the correctly sized pump, the temperature can be made to closely match any desired value.

Comparison Position of Solar PV System : College Learning Building South Lampung

2019 ◽  
Author(s):  
Rishal Asri
Keyword(s):  
Electrical Energy ◽  
Performance Ratio ◽  
Solar Pv ◽  
Pv System ◽  
Solar Pv System ◽  
College Learning ◽  
A Performance

Sunlight is energy that can be converted into electrical energy. One of the uses is by applying it to the roof ofthe building. The application in this building has restrictions such as the placement of the PV moduleshorizontally and vertically. In the study comparing the results of energy obtained from the PV system withhorizontal and vertical positions with a standard degree angle in the direction of azimuth sunlight. Positionusing the horizontal produces more energy and reaches a performance ratio of more than 80%.

Performance and economic analysis of solar-powered adsorption-based hybrid cooling systems

2021 ◽  
Vol 238 ◽  
pp. 114134
Author(s):  
Mohamed G. Gado ◽  
Tamer F. Megahed ◽  
Shinichi Ookawara ◽  
Sameh Nada ◽  
Ibrahim I. El-Sharkawy
Keyword(s):  
Economic Analysis ◽  
Cooling Systems ◽  
Hybrid Cooling ◽  
Solar Powered

Techno-economic Analysis of 1 MWp Floating Solar PV Plant

2020 ◽  
Author(s):  
Swati S Gurfude ◽  
Chappidi Bhavitha ◽  
Deshetty Tanusha ◽  
Dhayapule Mounika ◽  
Suma Pyate Gouda Kake ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Solar Pv

scholarly journals Numerical Evaluation of a HVAC System Based on a High-Performance Heat Transfer Fluid

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3298
Author(s):  
Gianpiero Colangelo ◽  
Brenda Raho ◽  
Marco Milanese ◽  
Arturo de Risi
Keyword(s):  
Heat Transfer ◽  
High Performance ◽  
Cooling System ◽  
Electrical Energy ◽  
Simulation Software ◽  
Heat Transfer Fluid ◽  
Hvac System ◽  
Dynamic Simulations ◽  
Heating And Cooling ◽  
The University

Nanofluids have great potential to improve the heat transfer properties of liquids, as demonstrated by recent studies. This paper presents a novel idea of utilizing nanofluid. It analyzes the performance of a HVAC (Heating Ventilation Air Conditioning) system using a high-performance heat transfer fluid (water-glycol nanofluid with nanoparticles of Al2O3), in the university campus of Lecce, Italy. The work describes the dynamic model of the building and its heating and cooling system, realized through the simulation software TRNSYS 17. The use of heat transfer fluid inseminated by nanoparticles in a real HVAC system is an innovative application that is difficult to find in the scientific literature so far. This work focuses on comparing the efficiency of the system working with a traditional water-glycol mixture with the same system that uses Al2O3-nanofluid. The results obtained by means of the dynamic simulations have confirmed what theoretically assumed, indicating the working conditions of the HVAC system that lead to lower operating costs and higher COP and EER, guaranteeing the optimal conditions of thermo-hygrometric comfort inside the building. Finally, the results showed that the use of a nanofluid based on water-glycol mixture and alumina increases the efficiency about 10% and at the same time reduces the electrical energy consumption of the HVAC system.

Vector field path following of a full-wing solar-powered Unmanned Aerial Vehicle (UAV) landing based on Dubins path: a lesson from multiple landing failures

2021 ◽  
pp. 1-30
Author(s):  
A. Guo ◽  
Z. Zhou ◽  
R. Wang ◽  
X. Zhao ◽  
X. Zhu
Keyword(s):  
Vector Field ◽  
Path Following ◽  
Endurance Performance ◽  
Electrical Energy ◽  
Lateral Control ◽  
Special Configuration ◽  
Straight Line ◽  
Lateral Distance ◽  
Solar Powered ◽  
Line Path

Abstract The full-wing solar-powered UAV has a large aspect ratio, special configuration, and excellent aerodynamic performance. This UAV converts solar energy into electrical energy for level flight and storage to improve endurance performance. The UAV only uses a differential throttle for lateral control, and the insufficient control capability during crosswind landing results in a large lateral distance bias and leads to multiple landing failures. This paper analyzes 11 landing failures and finds that a large lateral distance bias at the beginning of the approach and the coupling of base and differential throttle control is the main reason for multiple landing failures. To improve the landing performance, a heading angle-based vector field (VF) method is applied to the straight-line and orbit paths following and two novel 3D Dubins landing paths are proposed to reduce the initial lateral control bias. The results show that the straight-line path simulation exhibits similar phenomenon with the practical failure; the single helical path has the highest lateral control accuracy; the left-arc to left-arc (L-L) path avoids the saturation of the differential throttle; and both paths effectively improve the probability of successful landing.

scholarly journals Solar-Powered Carbon Fixation for Food and Feed Production Using Microorganisms—A Comparative Techno-Economic Analysis

ACS Omega ◽  
2020 ◽  
Vol 5 (51) ◽  
pp. 33242-33252
Author(s):  
Marja Nappa ◽  
Michael Lienemann ◽  
Camilla Tossi ◽  
Peter Blomberg ◽  
Jussi Jäntti ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Carbon Fixation ◽  
Feed Production ◽  
Food And Feed ◽  
Solar Powered
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