iosr-JMCE   Volume-19 ~ Issue-2 ~ Mar. – Apr. 2022

Abstract: The cold air coming out from an air-water harvester machine has not been utilized yet. Therefore, this study focused on ability of the air-water harvester machine to cool drinking water.
This research was conducted experimentally with variations of drinking water mass. The drinking water mass variations studied consisted of 0 kg of drinking water (empty drinking water chamber), 1.5 kg and 3 kg of drinking water. This machine used R134a refrigerant and a compressor of 1/2 PK. The evaporator used was a coil shape with the coil number of 18, coil diameter of 12 cm, the total pipe length of 7.14 m and the pipe diameter of 6.35 mm. The evaporator pressure was kept a constant pressure of 40 psi. The mass of refrigerant fed into the machine was 190 g.........

Key words: Air-water harvester; Drinking water mass; Cooling ability; COP

[1]. Wahyu R, Rangkuti C. Pengaruh beban pendinginan minuman kaleng terhadap suhu pada kotak pendingin berbasis termoelektrik dengan menggunakan listri dan akumulator. Seminar Nasional Pak.2018.
[2]. Riswoko. Mesin penangkap air dari udara menggunakan siklus kompresi uap dengan kecepatan putar kipas 400 RPM dan 450 RPM. Universitas Sanata Dharma, Yogyakarta. 2018.
[3]. Atmoko YWT. Karakteristik Mesin Penghasil Air Dari Udara Menggunakan Mesin Siklus Kompresi Uap Dengan Tambahan Kipas Pemadat Udara Berkecepatan Putaran Kipas 300 RPM Dan 350 RPM. Yogyakarta, Sanata Dharma University. 2018.
[4]. Prasetyo A. Karakteristik mesin penangkap air dari udara yang menggunakan komponen mesin AC 1,5 PK. Universitas Sanata Dharma, Yogyakarta. 2018.
[5]. Dirgantara RP. Pengaruh Posisi Evaporator Terhadap Jumlah Air Embun Yang Di Hasilkan Dengan Menggunakan Sistem Kompresi Uap, Mataram : Universitas Mataram. 2021

Abstract: In the present industrial revolution of industry 4.0 as there is a serious need to look in developing non-conventional energy sources of energy. As day to day, there is depletion of fossil fuels and the concern for the development of renewable energy sources is very much required. Renewable energy sources such as solar, wind, ocean, and geothermal are a few kinds of them. In the present paper, a Solar pump with solar tracking is designed and the performance is also measured. Background. Since various irrigation points of the organization are located in areas without an electric grid, photovoltaic cells can provide the necessary power......

Key Word: Solar Energy, Photovoltaic Cell, Solar Tracking Renewable energy, Fossil Fuels, Power

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Abstract: Water power offers big advantages to the communities they serve because of its cleanness and sustainability. Though unevenly distributed over the country, Nigeria boasts of abundant water resources covering an enormous and diverse landscape across the length and breadth of the country. Effective exploitation of these resources is favored through very small hydropower technologies. Hitherto hydropower plants in Nigeria have been constructed in the very large scale basis where a dam is first built to hold the water and render the necessary head required to drive the turbine. Apart from the great ecosystem disruption caused by conventional hydropower installations, the equipment are very expensive and far beyond the financial strength of communities and individuals. Currently most hydropower installations in Nigeria were built by government. Energy scarcityr......

Key Word: Water, Resources, Hydropower, Run of River, Direct River

[1]. Anderson D., Moggridge H., Warren P. and Shucksmith J. (2015). The impacts of 'run-of-river' hydropower on the physical and ecological condition of rivers. Water and Environment Journal; ISSN 1747-6585,
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Abstract: The purpose of this work is to investigate the compressive strength of concrete by including aluminium powder and steel fibres. For this reason, aluminium powder was used to partially replace the cement, and steel fibres were used to partially replace the coarse aggregates. The aluminium powder when comes in contact with the cement particles tend to react with the calcium hydroxide present in the cement to produce hydrogen gas which is responsible to give a cellular kind of matrix to the concrete making it light in weight as compared to the conventional concrete which is helpful in reduction of the dead load of the structure. On the other hand, the steel fibers provide resistance to cracking in the concrete improving its ability to withstand high impact loading improving the strength and durability of the concrete. The main objective of this work is to utilize the waste product in to the concrete to improve its engineering properties. Replacement of aluminium powder and steel......

Key Word: aluminium powder, steel fiber, lightweight concrete

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Abstract: Water being the utmost important for life (including the humans) represents the bulk biomass of living organisms. Due to highly limited availability of fresh usable water and its contamination generated the need for its purification. Although solar stills are well known apparatus for production of distilled water from saline water, yet its limited productivity make it of less utility. In the present experiment, a flat mica plate and fins has been embedded in the tubular solar still to augment evaporation of the water from the input saline water. Compared to conventional solar stills, the currently modified tubular solar still increased the output by 25%..

Key Word: Tubular solar still, Mica sheet and fins

[1]. Ahsan, A., Shafiul Islam, Kh M., Fukuhara, Teruyuki and Abdul Halim Ghazali, (2010). Experimental study on evaporation, condensation and production of a new Tubular Solar Still. Desalination 260:172-179.
[2]. Zheng, H., Chang, Z., Chen, Z., Xie, G. and Wang, H., (2013). Experimental investigation and performance analysis on a group of multi-effect tubular solar desalination devices. Desalination 311:62-68
[3]. Zheng, H., Chang, Z., Zheng, Z., Chen, Z. and Su, Y., (2013). Performance analysis and experimental verification of a multi-sleeve tubular still filled with different gas media. Desalination 331: 56-61.
[4]. Arunkumar, T., Jayaprakash, R., Ahsan, A., Denkenberger, D., and Okundamiya, M.S., (2013). Effect of water and air flow on concentric tubular solar water desalting system. Appl. Energy 103:109-115
[5]. Chen, Z., Yao, Y., Zheng, Z., Zheng, H., Yang, Y., Hou, L. and Chen, G., (2013). Analysis of the characteristics of heat and mass transfer of a three-effect tubular solar still and experimental research. Desalination 330:42-48

Abstract: The population growth of Makassar Municipality every year is 1.27%, including the Islands Region, and influence on the number of passengers or users of inter-island transportation services in Makassar. This study identifies the movement characteristic of community, analysis of traffic generation between islands, and formulates a strategy for developing sea transportation in Makassar. Data sourced from direct observations in the field, the physical condition of transportation facilities, namely traditional ship at the Harbor Base Life at the Bangkoa Wooden, Paotere Harbor, and port infrastructure facilities with documentation that completes the analysis for discription......

Key Word: Islands Region, Transportation Demand, Shipping and Infrastructure

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Abstract: TRIP steels (transformation induced by plastic deformation) are new generation steels within the advanced AHSS steels. They are characterized by having a good combination of mechanical properties, such as high strength, high ductility and a high rate of strain hardening apart from a moderate yield point. Its microstructure is composed of ferrite, bainite and retained austenite. The first is the soft matrix, the second provides strength and toughness, and the third is austenite, which during deformation become into martensite will give it great mechanical strength. This combination of properties makes it very suitable for use in applications in the automotive and aeronautical industries. The purpose of this article is to investigate the factors that most influence their formation, mechanical......

Key Word: Aadvanced steels; Trip steels; Retained Austenite; Intercritical Annealing; Austempering

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