The astronomical blessing of Indonesia which is passed through the equator is abundant sunlight. Sunlight can be used as an alternative or renewable energy source. For example, changing sunlight into electrical energy using a solar panel system.The astronomical blessing of Indonesia which is passed through the equator is abundant sunlight. Sunlight can be used as an alternative or renewable energy source. For example, changing sunlight into electrical energy using a solar panel system.
When the weather in Indonesia’s territory, especially Surabaya, gets heated up, the use of air cooler is one way.
However, the use of air cooler will certainly be taken into consideration when the basic electricity tariff is high.
So, is there another solution to keep the room cool in this hot condition?
Reporting from vankool.com, in Bangladesh a tool has been found to keep the room cool even though it does not use tools such as fans or air cooler.
Understandably, Bangladesh is an area that has not been touched by electricity.
Even if there is electricity, the cost of paying for electricity will be very expensive.
Bangladesh is famous for having quite hot weather.
It was recorded that during the summer of 2016, the average temperature in East Pakistan had reached 45 ° c.
Although various conditions seemed to not support them, the big idea turned out to be born from that situation.
One of the poorest citizens of Bangladesh was created to make air cooler with plastic bottles that are easily found everywhere.
This innovation was first coined with named solar cooler.
The workings of this tool are calculated to be very simple, and can even be done by anyone.
The basic working principle of this tool is the same as when we try to blow our hands with our mouth open and blowing our hands with our mouth almost closed.
There will be a difference in the air produced by the blow.
It is the same as when the end of the cavity where the air flows gets narrower, the air will experience a decrease in temperature.
This basic principle is used by Ashis when creating an Eco-cooler.
Eco-cooler uses only the middle to the top of a plastic bottle.
The neck to the mouth of the bottle becomes an area to reduce the temperature of the air, while the stomach of the bottle as the entrance gate for air.
The plastic bottles that have been cut are then mounted on a board that has been perforated as a place to stick the bottle mouth.
The board that has been fully attached to this plastic bottle is then placed as part of the building wall.
That was what Prof. Dr. Syafaruddin ST M Eng did. The Electrical Engineering lecturer developed the ” air cooler System with Solar Energy.” He created air cooler by utilizing sunlight as an alternative energy source to save electricity and be environmentally friendly.
“This solar energy has enormous energy potential to be used both for electrical energy systems, heating and drying systems and air cooling systems,” explained Prof. Syafaruddin to identity via email, Wednesday (15/5).
Initially, this tool was the development of a thesis project for electrical engineering students who took the topic of research on the application of photovoltaic-thermal systems (PV-T) in 2017. The topic of the research was later developed by Prof. Syafaruddin and his students, which resulted in this air cooler concept.
The construction of this tool project received development funding from the Ministry of Research, Technology and Higher Education (Kemenristekdikti) through the superior applied research scheme of universities in 2017-2018 with the topic of the PV-T system.
This research has also been published in international journals, can be found in the journal: ICIC Express Letters, Part B: Applications, Vol. 9, No. 12, pp. 1223-1231, December 2018 with the title: “Application of Photovoltaic-Thermal (PV-T) Power for Cooling Systems’.
In addition, this air cooler has also received a patent registered in 2018, with registration number P15201801. The title of the patent for this air cooler is: air cooler System with Solar Energy’.
Materials and equipment used for air cooler systems with solar energy are divided into the requirements for the design and construction of cooling systems. For the construction of the cooling system, each one of the 50 Wp solar panels and other equipment is needed.
The working principle of this air cooler is the first is the solar panel extracting heat energy on the back of the module surface. Then the heat energy that has been collected in the extraction box will be used to heat the water passing through the copper pipe installed in the extraction box. The hot water obtained is then flowed into the heating tank so that it cools the liquid refrigerant and makes the coolant evaporate.
The refrigerant that evaporates will then be sucked into the cooling tank, then the refrigerant tank will experience a drop in temperature and undergo a condensation process. The temperature drop that occurs in the cooling tank will be used to cool the water flowing from the cooling tank to the room.
In the room, an evaporator is used to hold cold air in flowing water, which is then exhaled into the room, causing the room to experience a decrease in temperature. The cycle will continue to work continuously to make the air temperature in the room cooler.
The advantages of this tool compared to conventional air cooler are; in this tool the solar panel extracts solar thermal energy through its lower surface to heat the coolant (refrigerant), then at the same time the circulation of hot and cold air and the performance of the compressor and controller get an electric power supply from the energy output of the solar panel.
“The process of this tool clearly saves electricity and is environmentally friendly compared to conventional air cooler, whose electrical energy consumes very high electrical energy, especially reactive power consumption to drive motors, air compressors and electrical energy to heat air cooler fluids in the AC system,” said Prof. Syafaruddin.
While the shortcomings of this tool can be seen in the decrease in room temperature as a result of the performance of this tool has not been maximized even though it can be obtained in the comfort of room temperature. This is because we have not increased the compressor performance pressure because this certainly requires greater energy while the electrical energy source that we use still comes from the energy output of solar panels.
“It is necessary to think about designing a high-pressure compressor but with low electricity consumption. In this case the role of power electronics technology will be very helpful to realize the desired compressor performance, “he explained.
Although the usefulness of this tool is broadly invisible because the stages obtained are still in the prototype stage. However, Prof. Syafaruddin said that in the future, better quality equipment components such as compressors and coolants are needed to support the efficiency and effectiveness of the performance of these refrigerators while continuing to explore more comprehensive thermodynamics.
“Lower temperature is certainly needed, which is certainly supported by high compressor performance and coolant quality, because the use of environmentally friendly energy based on renewable energy in refrigeration is certainly very expected in the future,” he concluded.