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Waas, Kristofol
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Humanities Education Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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ANALISA KINERJA NATURAL DRAFT COOLING TOWER DI PPSDM MIGAS CEPU Putirulan, Tesya; Waas, Kristofol; Loppies, Leslie S; Lopuhaa, Agustinus Oktovianus
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2914

Abstract

Human resource development center (PPSDM) a series of production processes such as boiler, power plants, coal testing sites, water treatment, fire and safety, pumps, welding workshops, distribution sites and refinery units, one of which is the cooling tower. The cooling tower is part of the power generation system that has a function as a heat exchanger between hot water coming out of the condenser and air so that the water has a lower temperature and can be reused in the condesation proses. The reseach on natural draf cooling tower in PPSDM migas aims to find parameters that affect the performance of natural draf cooling tower such as efficiency, make up water and also the heat transfer capacity of the cooling tower unit. In this writing, researchers use direct research methods in the field to find out the phenomena that occur in the colling Tower. While the performance of the natural draft cooling tower is calculated using the calculation method. The research results show an actual of 82,61 %, the recorded cooling capacity is 2417,941 kJ/s and the make up water value is 24.03 %Keywords: Cooling tower, Range, Approach, Effectiveness, Cooling Capacity, Make-Up Water.
PERHITUNGAN BEBAN PENDINGIN PADA COLD ROOM DAN ABF-1 UNTUK PENYIMPANAN PRODUK HASIL LAUT DI PT. MINA USAHA HARAPAN Kakiay, Isaac Bryant; Waas, Kristofol; Lekatompessy, Roy R.
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2915

Abstract

Refrigeration has become an essential part in the design of spaces that will be occupied by people or products intended to provide space temperature, humidity, other process requirements. Refrigeration was originally used to produce ice, as technology advances, refrigeration has an important role in commercial and non-commercial refrigeration. Research on efficient refrigeration has been carried out by several previous studies. Previous methods were used by calculating cooling efficiency and heat loads that affect cold storage cooling.Based on an interview with one fishery company focused on processing quality seafood products located in PPN Tantui, PT Mina Usaha Harapan, the energy consumption for the cooling system takes up almost 70%-80% of the total energy expenditure of the company. Due to several factors, including excessive heat loads provision, or inefficient cold storage design. Therefore, author wants to calculate the cold storage performance in one of the seafood processing companies based on eco-fishing located in PPN Tantui, PT Mina Usaha Harapan.Calculations and analysis have been carried out in the previous chapter, several conclusions is made: 1) The average value of evaporator capacity is 34.96 kW for Cold Room and 57.39 kW for Air Blast Freezer 2) The calculated total load value (without product load) is 11.94 kW for Cold Room and 3.56 kW for ABF. 3) The company set a time of 9 hours to freeze 3500 kg of seafood, but according to calculation results, it only takes 7 hours to freeze 3830.4 kg of products with product temperature reaching -21 ͦC.Keywords: vapor compression cold storage, refrigeration load, cold room, abf, cold storage, evaporator capacity, seafood products
EVALUATION OF THE SANDNESS OF THE NGRAYONG LAYER IN THE XYZ WELL OF PERTAMINA ASSET IV CEPU Untoro, Edi; Waas, Kristofol
International Journal Multidisciplinary Science Vol. 3 No. 2 (2024): June: International Journal Multidiciplinary
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijml.v3i2.1257

Abstract

Most oil and gas wells produce through sandstone formations deposited in marine or detrital environments. Marine sedimentary sands, in which most of the hydrocarbons are found, are often cemented with calcareous or siliceous minerals and may be heavily consolidated. In contrast, Miocene and younger sands are often unconsolidated or only partially consolidated with soft clays or silts. This formation, which is structurally weak, is unlikely to be able to withstand the movement of sand grains. When oils are produced at high flow rates, they can produce sands along with the liquid oil. The movement of fluid through the sandstone reservoir creates stresses in the sand grains due to differences in fluid pressure, fluid friction, and overburden pressure. If this stress exceeds the formation holding force, then the sand grains and fines can move and can be produced with oil liquid. Rapid changes in the liquid production rate can cause unstable conditions which can result in increased sand production. When an oil well begins to produce water, this will often be an indication of the start of sand production. Muecke[1], demonstrated that particle motion occurs in a multiphase system when the wetting phase begins to move. Even consolidated sandstone can be mechanically and chemically damaged over time as the reservoir is produced. The overburden stress on the sand grains will increase as the reservoir pressure decreases. The movement of water can dissolve the minerals that cement the sand grains and can change the production capacity of the formation fluid. Smooth migration can reduce permeability in the perforations. This can result in higher pressure drops in the wellbore and changes in formation stress. Formations cemented by calcite can be damaged by improperly designed acidification, and can result in increased production of sand.
Co-Authors Kakiay, Isaac Bryant Lekatompessy, Roy R. Loppies, Leslie S Lopuhaa, Agustinus Oktovianus Putirulan, Tesya Untoro, Edi