scholarly journals Analysis Of The Coefficien Of Performance (COP) Freezer Produced By Solar Cell

2021 ◽  
Vol 2 (6) ◽  
pp. 2230-2238
Author(s):  
Sudirman Lubis ◽  
Rafsanzani Pane
Keyword(s):  
Solar Energy ◽  
Electric Energy ◽  
Electrical Energy ◽  
Energy Sources ◽  
Cooling Load ◽  
Vapor Compression ◽  
The Future ◽  
Vapor Compression System ◽  
The Media ◽  
The University

The use of freezer machines has now become a necessity for the wider community, because it is very helpful for humans in everyday life. The cooling load given greatly affects the performance of the freezer, both in terms of electrical energy consumption and the ability to increase system usage time. The greater the cooling load will increase the use of electrical energy during operation. This is very worrying in the future where the issue of depleting fossil energy sources which is currently a priority for producing electrical energy is increasing and filling the media. In recent years, solar energy has been rumored to be the answer to this problem. Where heat energy from the sun is used to move protons and electrons in a solar panel media to produce electrical energy that can be used for the needs of many people. This has become the attraction of researchers to make an innovation in the use of solar energy in a freezer system. Judging from the research roadmap related to solar energy and the vapor compression system in the freezer that was launched in the last few years, not many innovations have been carried out in the use of energy sources. The cooling load to be used will be adjusted to the capacity of the energy source used, which is 410 WP. With the capacity of the freezer that is used with a power of 1/4 PK which will increase its ability/ efficiency to be used and replace the paid electric energy freezer. This is expected to be useful for the public and contribute knowledge and help realize the university roadmap in the future.

scholarly journals Liquid Desiccants Applications in Cooling and Dehumidification – An Overview

2019 ◽  
pp. 1-17
Keyword(s):  
Air Conditioning ◽  
Power Plants ◽  
Fossil Fuel ◽  
Electrical Energy ◽  
Cooling Load ◽  
Vapor Compression ◽  
Vapor Compression System ◽  
Industrial Use ◽  
Optimum Cost ◽  
Effective Use

Potential option to replace the traditionally used vapor compression system with desiccant based dehumidification and cooling to overcome the problems in VCR use like as substantial consumption of high grade electrical energy and to eliminate the use of the CFC based refrigerants which are responsible for the depletion of ozone layer. The desiccant cooling can be proved to be an efficient in highly moist atmosphere to handles the latent cooling load of the conditioned space. The present overview explains about the detailed ideas for making use of various chemicals as the desiccant solution for their optimum cost and characteristics. The desiccant cooling can handle both humidity and temperature separately and effectively to produce necessary thermal comfort within the conditioned space. The desiccant cooling can find optimum use of renewable solar energy in air conditioning by applying them for desiccant regeneration to lower the consumption of electricity which produced mostly by fossil fuel based power plants which leads to problem of pollution subsequently. The present review provides the direction for effective use of the desiccant based cooling for separable control over temperature and humidity in case of both residential and industrial use to ameliorate the dual - energy and cost saving.

Liquid Desiccants Applications in Cooling and Dehumidification – An Overview

2019 ◽  
pp. 1-17
Keyword(s):  
Air Conditioning ◽  
Power Plants ◽  
Fossil Fuel ◽  
Electrical Energy ◽  
Cooling Load ◽  
Vapor Compression ◽  
Vapor Compression System ◽  
Industrial Use ◽  
Optimum Cost ◽  
Effective Use

Potential option to replace the traditionally used vapor compression system with desiccant based dehumidification and cooling to overcome the problems in VCR use like as substantial consumption of high grade electrical energy and to eliminate the use of the CFC based refrigerants which are responsible for the depletion of ozone layer. The desiccant cooling can be proved to be an efficient in highly moist atmosphere to handles the latent cooling load of the conditioned space. The present overview explains about the detailed ideas for making use of various chemicals as the desiccant solution for their optimum cost and characteristics. The desiccant cooling can handle both humidity and temperature separately and effectively to produce necessary thermal comfort within the conditioned space. The desiccant cooling can find optimum use of renewable solar energy in air conditioning by applying them for desiccant regeneration to lower the consumption of electricity which produced mostly by fossil fuel based power plants which leads to problem of pollution subsequently. The present review provides the direction for effective use of the desiccant based cooling for separable control over temperature and humidity in case of both residential and industrial use to ameliorate the dual - energy and cost saving.

scholarly journals The impact of the endowment on photovoltaic energy to support Palestinian university education: A maqasid jurisprudential View: أثر الوقف على الطاقة الشمسيّة الكهروضوئية في دعم التعليم الجامعي الفلسطيني: رؤية فقهية مقاصدية

2021 ◽  
Vol 4 (3) ◽  
pp. 128-109
Author(s):  
Mohammad Motlaq Assaf, Mohammad Saied Khaseeb Mohammad Motlaq Assaf, Mohammad Saied Khaseeb
Keyword(s):  
Solar Energy ◽  
Electrical Energy ◽  
University Education ◽  
Legal Services ◽  
Photovoltaic Energy ◽  
University Life ◽  
New Ideas ◽  
Palestinian Universities ◽  
The University ◽  
The Impact

This study aims at providing the influence of the endowment on solar energy. And its reflection on the scientific university life. Also it aims at supporting the university education in Palestine by supporting new ideas to support the scientific research's by clarifying the legal texts, according to university situations to reduce deficit value in Palestinian universities. The electrical energy is considered the main columns of the environmental and civilization progress. As it's mainly connected to the instruments and equipment that make life easier. These instruments burn fuel that leads to harmful and dangerous effects on environment. During scientific research'. scientists found out that they can convert solar energy into Photovoltaic energy that doesn't need to burn fuel to be generated. This saves money as well as building new cultures to help in modernising the world. The abstract reach's to great likeness of the use of the endowment to serve the generated solar system. It's mainly a good application for the Islamic legal services on a solid ground. And it's related to environment protection and to saving money. So the legal endowment is able to solve problems of the continuous increasing cost of traditional power components.

scholarly journals Solar Tracking System Untuk Lampu Taman STMIK AUB Surakarta Berbasis Arduino Uno

2018 ◽  
Vol 24 (2) ◽  
pp. 134
Author(s):  
Robby Rachmatullah ◽  
Dessyana Kardha ◽  
Dani Triwiyanto
Keyword(s):  
Solar Energy ◽  
Fossil Fuels ◽  
Tracking System ◽  
Electrical Energy ◽  
Energy Sources ◽  
Solar Panels ◽  
Turn On ◽  
Solar Tracking ◽  
Arduino Uno ◽  
To Receive

The transfer of electrical energy sources from non-renewable fossil fuels to alternative renewable fuels can be made by utilizing solar energy. The working system of arduino uno solar tracking system for STMIK AUB garden lights is by capturing solar energy through solar panels which are then stored inside the battery where the charging process is controlled by solar charge controller. LDR functions to receive and identify the radiated light quantities which are then forwarded into the arduino uno and processed to drive the DC motor that has become one with the solar panel. If the day begins to darken the LDR will inform the arduino uno and then it will be processed by arduino uno to turn on the DC light.

scholarly journals Progressive Development and Challenges Faced by Solar Rotary Desiccant-Based Air-Conditioning Systems: A Review

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1785
Author(s):  
Ranjan Pratap Singh ◽  
Ranadip K. Das
Keyword(s):  
Solar Energy ◽  
Air Conditioning ◽  
Energy Use ◽  
Operating Cost ◽  
Electrical Energy ◽  
Low Grade ◽  
Vapor Compression ◽  
Cooling Systems ◽  
Ongoing Research ◽  
Air Conditioning Systems

A rotary desiccant-based air-conditioning system is a heat-driven hybrid system which combines different technologies such as desiccant dehumidification, evaporative cooling, refrigeration, and regeneration. This system has an opportunity to utilize low-grade thermal energy obtained from the sun or other sources. In this paper, the basic principles and recent research developments related to rotary desiccant-based cooling systems are recalled and their applications and importance are summarized. It is shown that with novel system configurations and new desiccant materials, there is great potential for improving the performance and consistency of rotary desiccant systems; at the same time, the use of solar energy for regeneration purposes can minimize the operating cost to a great extent. Some examples are presented to demonstrate how rotary desiccant air conditioning can be a promising solution for replacing traditional vapor-compression air-conditioning systems. Recent advances and ongoing research related to solar-powered hybrid rotary desiccant cooling systems are also summarized. The hybrid systems make use of a vapor-compression system in order to have better operational flexibility. These systems, although they consume electrical energy, use solar energy as the principal source of energy, and hence, significant savings of premium energy can be obtained compared to conventional vapor-compression systems. However, further research and development are required in order to realize the sustainable operation of solar rotary desiccant air-conditioning systems, as solar energy is not steady. Reductions in capital cost and size, along with improvements in efficiency and reliability of the system is still needed for it to become a player in the market of air conditioning.

scholarly journals Perhitungan Kebutuhan Daya Listrik untuk Penggerak Perahu Nelayan Bertenaga Surya

CYCLOTRON ◽  
2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Radiratu K ◽  
Belly Yan Dewantara
Keyword(s):  
Free Energy ◽  
Renewable Energy ◽  
Solar Energy ◽  
Electric Energy ◽  
Electrical Energy ◽  
Energy System ◽  
Energy Requirements ◽  
Solar Panels ◽  
Fishing Boat ◽  
Body Design

Abstrak - Perahu merupakan salah satu armada yang digunakan para nelayan untuk mencari mata pencaharian. Namun pada umumnya pada saat perahu nelayan beropesi mengandalkan bahan bakar sebagai penggerak kapal, hal ini sangatlah tidak menguntungkan mengingat harga bahan bakar semakin mahal. Pada penelitian ini akan membahas desain dan perhitungan daya listrik penggerak perahu nelayan dimana enegi listrik didapat dari energi surya. Dengan adanya sistem pemanfaatan energi surya ini akan menghemat pengeluaran nelayan bahkan bisa dikatakan bahwa energi ini merupakan energi cuma-cuma atau gratis. Pada penelitian ini akan dihitung desain bodi perahu dengan kapasitas 2-3 orang, perhitungan kebutuhan alat penggerak, perhitungan kebutuhan energi listrik dan perhitungan panel surya yang akan digunakan. Hasil dari penelelitian ini dapat dijadikan kajian untuk pengembangan perahu ramah lingkungan, ekonomis, dan pemanfatan enegi surya yang merupakan energi terbarukan. Kapal yang dirancang mempunyai dimensi 3 meter dan lebar 1,33 meter dengan kecepatan 3-4 knot dan menggunakan panel surya dengan spesifikasi 150Wp sebanyak 3 buah.Kata kunci: perahu nelayan, energi penggerak kapal, panel surya, energi terbarukan, MPPTAbstract—Boat is one of the fleets that fishermen use livelihoods. But in general, when fishing boats oppose relying on fuel as a boat propeller, this is very unprofitable given the increasingly expensive. In this study will discuss the design and calculation of electric power driving a fishing boat where the electric energy is obtained from solar energy. Solar energy system will save fishermen's expenses. It can even be said that this energy is free energy. In this study the boat body design will be design with a capacity of 2-3 people, calculation of propulsion requirements, calculation of electrical energy requirements and calculation of solar panels to be used. The results of this research can be used as a study for the development of environmentally friendly, economical boats and the utilization of solar energy which is renewable energy. The ship was designed to have dimensions of 3 meters and 1.33 meters wide with a speed of 3-4 knots and uses 3 solar panels with capasity 150Wp.Keywords: fishing boat, boat propulsion energy, solar panel, renewable energy, MPPT

scholarly journals THE EFFECT OF THE TRIBAL JALWA ON THE EDUCATIONAL ATTAINMENT OF THE DESCENDANTS OF THE COMMUNITY FAMILIES AND THE SONS OF THE FUTURE SOCIETY OF AL-JALWA

2020 ◽  
Author(s):  
Ahallam Abdul Karim Al- Lassasmeh
Keyword(s):  
Educational Attainment ◽  
Negative Effects ◽  
Public Places ◽  
Decent Life ◽  
The Future ◽  
Future Society ◽  
The Media ◽  
Judicial Procedures ◽  
The University ◽  
The Impact

The study aimed to find out the effect of the tribal glow on the educational attainment of the children of the community families and the children of a future society of the Jilwa, an exploratory study in one of the villages of Karak, and this study is considered a new study about the damages resulting from the tribal glow on the university academic achievement of the children of the community families and families receiving the glow, and the impact on Their thinking in the future and how they choose scientific majors in universities, which would help them change their current conditions and improve their lives for the better, and the least expensive, due to their poor financial conditions imposed on them by the clan. The role of the tribal judiciary is considered important in limiting or minimizing the negative effects resulting from the tribal clan by creating suitable conditions for those arriving by the act of jealousy. In this way, it examines one of the social problems that the society suffers from in order to find some solutions, and to achieve the objectives of the study, a questionnaire was constructed for the purpose of data collection, and a regular random sample was chosen, and the study concluded with a set of recommendations, the most important of which were: Increasing awareness and education through means The media, about the damage caused by al-Jawwah in terms of harm within a society, and the acceleration of judicial procedures to absorb anger, and the creation of places designated for their reception in which the conditions for a decent life are met, and the state’s provision of material and security assistance to al-Jawa’s recipients to reduce the burdens and problems resulting from the jail, and the state’s distribution of community families on More than one area; To reduce overcrowding in public places, schools, transportation, and universities.

The Resonant Power Transmission System

2018 ◽  
pp. 534-560 ◽  
Author(s):  
Leonid Yuferev
Keyword(s):  
Renewable Energy ◽  
Electric Power ◽  
Power Transmission ◽  
Renewable Energy Sources ◽  
Electric Energy ◽  
Electrical Energy ◽  
Energy Sources ◽  
Dc Voltage ◽  
Reverse Converter ◽  
Lighting Systems

The transmission of electric energy from renewable energy sources requires a system of transmission of electrical energy. The most widespread system of electric power transmission is AC and DC. The chapter presents a description of a resonant system of electric power transmission on one wire. This system converts AC or DC voltage and transmits it over a single wire. At the end of a transmission line is a reverse converter that generates the standard voltage. This system of transmission of electrical energy can be applied to lighting systems.

2015 Henry Mayer Lecture: critical media studies and the re-invention of the media

2016 ◽  
Vol 161 (1) ◽  
pp. 101-108 ◽  
Author(s):  
Graeme Turner
Keyword(s):  
Media Studies ◽  
The State ◽  
Memorial Lecture ◽  
The Future ◽  
Critical Media Studies ◽  
Critical Media ◽  
The Media ◽  
The University

This is the expanded text of the Henry Mayer Memorial Lecture presented by Graeme Turner at the University of Queensland in November 2015. In it, he outlines his argument from his book, Re-inventing the Media, before going on to draw upon that argument to present a series of issues that need to be addressed by critical media studies in the future: the challenge of a bifurcating field, the thoroughgoing commercialisation of the media, and media studies’ drift away from the interrogation of the operation of power in the relations between the media, their audiences and the state.

scholarly journals Assessing the future prospects of solar energy conversion technologies in electronic applications

2018 ◽  
Vol 7 (4) ◽  
pp. 2149
Author(s):  
Dr Maha Abdul ameer Kadhim
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Energy Conversion ◽  
Solar Energy Conversion ◽  
Electrical Energy ◽  
Future Prospects ◽  
The Future ◽  
Bulk Power ◽  
Conversion Technologies ◽  
Future Status

Solar energy has become one of the most important sources of renewable energy. This is evident in the fact that many organizations and individuals have resorted to renewable energy, without fear of depletion, without fear of the monthly costs of using fuel-based electricity.The study examined the mechanism of using solar energy and the mechanism of solar cells in converting sunlight into electricity in general, and thus allocating research in solar energy conversion technologies to electrical energy, and some systems of assessing of these technologies, in order to know the future status of the technology of converting solar energy, as well as to know the costs that these technologies must reach in order to be a candidate for bulk power.  

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