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All Journal INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni Journal of Biology Education Journal of Maternal and Child Health FLUIDA QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT ASEAN Journal of Chemical Engineering JAS (Jurnal Agri Sains) Jurnal Pengabdian kepada Masyarakat Nusantara Jurnal Promotif Preventif Mattawang: Jurnal Pengabdian Masyarakat JURNAL ILMU KESEHATAN MULIA MADANI YOGYAKARTA DIMASLIA JEM : Jurnal Equilibrium Manajemen Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Jurnal Pengabdian pada Masyarakat
Sri Widarti, Sri
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Journal : FLUIDA

 1 
Potential of Reducing CO2 Emission Using Parabolic Trough Collector for 13.75MW Desalination Processes I Putu, Arya Krisnatama; Mursid, Sri Paryanto; Widarti, Sri
Fluida Vol. 16 No. sp1 (2023): FLUIDA x IRWNS Special Edition
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16isp1.5311

Abstract

Desalination is an important process in fulfilling the freshwater demands of both the industrial sector and human needs. Typically, thermal desalination processes rely on fossil fuels to minimize production costs. However, using fossil fuel in desalination contributes to releasing CO2 emissions into the atmosphere. Therefore, it is essential to utilize renewable energy sources to mitigate the production of CO2 emissions. To reduce CO2 emissions research has been conducted to explore the potential use of parabolic trough solar collectors in harnessing available solar energy at the power plant site for thermal desalination processes which required 13.75 MW of thermal energy. The study utilized the system advisor model software to assess the collector’s system performance. The research findings indicate that 416 units of parabolic trough solar collectors are required to fulfill the thermal power needs. The presence of these solar collectors has the potential to generate 26.06 GWh of thermal power, thereby reducing coal consumption by 5,740.4 metric tons per year and directly lowering CO2 emissions by 13,892 metric tons per year.
The Influence of Tube Thickness on the Shell Side of the Air preheater As a Form of Corrosion Prevention Ulyasa, Kinanti; Slameto, Slameto; Widarti, Sri
Fluida Vol. 16 No. sp1 (2023): FLUIDA x IRWNS Special Edition
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16isp1.5326

Abstract

Air preheater as a heat recovery technology is generally applied in the powerplant industry and used to heat combustion air, which increases the efficiency of the combustion chamber in the boiler. In this case, air preheater has tubular recuperative type typically located at the bottom of the circulating fluidized boiler for utilizing the lowest temperature exhaust gas. A significant presence of SO2 in the exhaust gas can lead to cold-end corrosion and cause leaks. The low tube thickness in the air preheater provides a good heat transfer performance unfortunately the corrosion issue has not been considered. By increasing the tube thickness, its aimed to extend the life time of the tubes with good corrosion resistance. This study is performed with calculations using empirical equations and validated results using Heat Transfer Research Inc (HTRI) software. Increasing the tube thickness impacts decreasing the heat transfer coefficient, increasing the flue gas (shell) pressure drop, and increasing the fouling factor. The tube thickness which determined for the corrosion prevention design of the air preheater give an overdesign of 18.14%, a heat transfer rate coefficient of 1.726 Btu/hr. ft2. °F, a shell pressure drop of 0.000541 psi, and a fouling factor of 0.114 hr. ft2. °F/Btu.
Effect of Diameter on Steam Pressure Sootblower to Eliminate Low Potential Slagging and Fouling Prabaswara, Abigail Qutratuain; Yuliyani, Ika; Widarti, Sri
Fluida Vol. 16 No. sp1 (2023): FLUIDA x IRWNS Special Edition
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16isp1.5594

Abstract

The combustion process in pulverized coal boilers utilizes coal fuel, which produces ash and heat. Ash from combustion process will be deposited and adhere to pipes, known as slagging and fouling. Cleaning of slagging and fouling is done using a sootblower by flowing pressurized fluid to generate a jet nozzle force, which can remove the slagging and fouling adhering to the pipes in the superheater. Based on testing of parameters, ash fusion temperature is 1415.42 oC, and silica ratio is 79.55%, indicating a low potential for slagging. For fouling testing yielded an index of 0.089, indicating a low potential for fouling. The existing retractable sootblower operates using superheated steam with a pressure of 70-75 bar. In the design of low-pressure sootblower, flow is derived from intermediate pressure turbine by modifying feed tube, lance tube, and sootblower nozzle. The design results in a feed tube diameter of 101.65 mm, a lance tube diameter of 114.3 mm, an inlet nozzle diameter of 21.1 mm, a throat nozzle diameter of 13.97 mm, and an outlet nozzle diameter of 41.02 mm, with a Mach number output of 2.09 and a total jet force of 2023.9 N.
Correlation of Steam Velocity and Pipe Diameter with Heat Transfer Performance on 120° Half-Pipe Jacket Widarti, Sri; Rahayu, Irma Galuh; Prayogo, Sapto
Fluida Vol. 16 No. sp1 (2023): FLUIDA x IRWNS Special Edition
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16isp1.5595

Abstract

Double jacket mixing tanks offer temperature control and versatility for industrial processes where temperature-sensitive materials need to be mixed, stored, or processed. The selection of the appropriate jacket type in a double-jacket mixing tank is based on the structural strength and the optimal heat transfer performance. The type of jackets can be conventional, dimple, and half-pipe. The conventional jacket is easier to manufacture, but it is not resistant to high temperature and pressure. The dimple jacket has good heat transfer, but it is susceptible to damage. The half-pipe jacket has good structural strength, but its heat transfer is affected by the central angle and pipe diameter. 120° central angle has greater heat transfer and pressure drop than 180° central angle. In order to determine the effects of steam velocity on heat transfer performance, heating time, and pressure drop of the 120° half-pipe jacket, research occurred on pipes with 2, 2.5, and 3 inches of diameter. The calculating method of heat transfer in agitated jacketed vessels is applied to visualize the relationships. The effects of steam velocity on heat transfer, heating duration, and pressure drop respectively are polynomials of order 2, power, and polynomials of order 2 with an average R2 close to 1. The greater R2, the better the relationship between two variables, according to the equation. The 120° half-pipe jacket performance will be highly effective, with 1774 W, 2.1 minutes heating duration, 8.94 kPa pressure drop if the steam velocity is 10.50 m/s with 2.5 inches pipe diameter.
Co-Authors A, Aisyah Adisty, Yulia Agus Suyanto Aini, Fitriana Amaliyah, Sherly Andung Nugroho, Andung Asiatun, Siti Asti Asti Dominikus Bancin, Hardi Eep Deddi, Eep Ellyta Ellyta Endah Peniati Fika Pratiwi, Fika Herlin, Kristin I Putu, Arya Krisnatama Ignatius Riyadi Mardiyanto Ismail Astar KURNIASETIAWATI, ANNISA Medianto Kurniawan, Hery Melati Sukma, Khayu Mursanto, Wahyu Budi MURSID, SRI PARYANTO Nurfitria, Rima Nurul Ariningtyas, Nurul Oktarianti, Sherly P, Fika Pamela, Pamela Prabaswara, Abigail Qutratuain Prayogo, Sapto Priyantini Widiyaningrum PUDIN, APIP Puspitasari, Riadinata Shinta Rahardjo, Agoeng Harjatmo Rahayu, Irma Galuh Rahmatullah Rizieq Rini Suryani, Rini Sayekti Eka Wahyudya, Indah Setiawan Setiawan Slameto Slameto Sri Andayani SRI RAHAYU Sri Utami Titi Wismawati, Titi Tritjahjono, Rachmad Imbang Tutik Purwani Irianti, Agnes Uki Retno Budihastuti Ulyasa, Kinanti Vitri Widyaningsih YANTI SUPRIANTI, YANTI Youlla, Donna Yulia Adhisty, Yulia Yuliana Ayen, Rosalina Yuliyani, Ika