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All Journal International Journal of Electrical and Computer Engineering Jurnal Energi Dan Manufaktur Jurnal Teknologi Reaktor Nuklir Tri Dasa Mega Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) ARTEKS : Jurnal Teknik Arsitektur Makara Journal of Technology INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Journal of Engineering and Technological Sciences Prosiding SNTTM Scientific Contributions Oil and Gas
Putra, Nandy Setiadi Djaya
Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics

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Harnessing Rotating Heat Pipes for Passive Electric Motor Cooling: Enhancing Electric Vehicle Efficiency Siregar, Yasmine Karenita; Rezqi, Khairu; Putra, Gerardo Janitra Puriadi; Fathoni, Andhy M; Putra, Nandy; Abral, Hairul
Journal of Engineering and Technological Sciences Vol. 58 No. 1 (2026): Vol. 58 No. 1(2026): February
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2028.58.1.7

Abstract

Electric vehicles are equipped with electric motors that convert electrical energy into mechanical energy to propel the vehicle. The motor experiences an increase in temperature during operation due to various losses that cause the motor temperature to rise. The performance of the electric motor will be reduced or even damaged if the heat continues to increase and the temperature exceeds 60°C. Therefore, there is a need for a cooling system that can maintain the electric motor's temperature within its working range. This study aims to investigate and test the rotating heat pipe (RHP) as a passive cooling system for electric motors. The objective of this research is to examine the performance of the RHP. The study employs a RHP with installed thermocouples on its surface. Additionally, a slip ring is utilized to serve as interface between the data acquisition module and the thermocouple sensor. In this investigation, the Rotating Heat Pipe was equipped with two slip rings to measure temperature in rotary conditions. This study proves that using RHP can reduce thermal resistance by 30-66% compared to stationary heat pipes.
POROUS MATERIAL ADSORBENTS IN ADVANCES DESIGN CONFIGURATION OF ADSORPTION DESALINATION PROCESS: A REVIEW Riana Ayu Kusumadewi; Setyo Sarwanto Moersidik; Sucipta Laksono; Firdaus Ali; Nandy Putra; Shafira Budiningsih; Widi Ajeng Luthfiyya
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 1, APRIL 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i1.22613

Abstract

Several desalination systems with distinct operational principles have been developed to enhance the generation of freshwater and optimize system efficiency. Adsorption desalination (AD) systems are highly desirable because to their ability to simultaneously achieve desalination and cooling using minimal energy input. These systems offer significant cost savings in terms of maintenance compared to conventional desalination systems. In order to gain a comprehensive understanding of the fundamental constituents of this desalination technology, the present study initially expounds upon the theory of adsorption and the process of circulation. Aims: The aim of this study is to conduct a thorough analysis of adsorbents for adsorption desalination and adsorption desalination technologies, and investigation into their potential integration with established conventional cycles, including multiple-effect distillation (MED), solar regenerable, and integrated evaporator-condenser cycles. Methodology and results: The findings of this study involve the evaluation and summarization of pertinent research on the fundamental aspects of the adsorption desalination system. These aspects include the thermodynamic process and cycle, performance assessment, adsorbents, and adsorption desalination technologies. The location, heat energy supply, collector, evaporator, condenser, adsorption desalination, adsorbent materials, and findings are investigated. Conclusion, significance and impact study: The discourse pertaining to prospective avenues of research, which will prove beneficial for analogous investigations within this domain, reaches a culmination.
Thermal performance enhancement in electric motor rotors: Evaluating the impact of rotating heat pipes Khairu Rezqi; Nandy Putra; Sholahudin Sholahudin; Gandjar Kiswanto
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/hdn06j82

Abstract

Effective thermal management is essential in high-performance electric motors, where rotor overheating accelerates demagnetization and reduces operational lifespan. This study investigates a horizontally mounted, wick based rotating heat pipe (RHP) as a passive cooling solution for an induction motor rotor. The system was subjected to stepped heat loads 20, 25, 30, and 35 W, also and speeds 0, 250, 500, 750 RPM, with time resolved measurements acquired to evaluate steady state thermal resistance (Rth) and transient response. The results reveal a non monotonic relationship between rotational speed and thermal performance. Contrary to initial assumptions, the RHP achieved its lowest Rth of 0.164 °C/W not at standstill, but at a moderate speed of 250 RPM. This performance peak is attributed to a balanced interplay where gentle centrifugal force enhances capillary-driven liquid distribution, maximizing effective evaporation without inducing flow instability. Compared to the solid rotor baseline, the RHP consistently reduced rotor temperatures by up to 6 °C and lowered thermal resistance by more than 70%. Additionally, the RHP halved the thermal time constant following each power step, indicating superior transient regulation. The identification of an optimal rotational speed window, distinct from any transitional instability zone, offers critical design insight for embedding RHPs in next-generation electric machines where spatial constraints and thermal reliability are paramount.
Heat gain reduction and cooling energy minimization through building envelope material Muthiah Hakim Hadini; Ova Candra Dewi; Nandy Setiadi Djaya Putra; Tika Hanjani
ARTEKS : Jurnal Teknik Arsitektur Vol 8 No 1 (2023): ARTEKS : Jurnal Teknik Arsitektur | Januari 2023 ~ April 2023
Publisher : Program Studi Arsitektur Fakultas Teknik Universitas Katolik Widya Mandira

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30822/arteks.v8i1.1910

Abstract

This study aims to reduce heat gain and minimise cooling energy through building envelope material as a passive design intervention strategy to achieve thermal comfort. Integrated Learning Building in the Faculty of Engineering, Universitas Indonesia, is used as a case study due to its air conditioning setting. First, the material characteristic of the building envelope is calculated using the Overall Thermal Transmission Value (OTTV) calculation to determine heat gain and the EDGE (Excellence in Design for Greater Efficiencies), a software to estimate cooling energy consumption. Then, a passive design intervention strategy is performed by adding insulation (polyester, bagasse, and recycled textile and paper) and substituting window glazing (reflective, PVB laminated, and Clear IGU Low-E). The results show that the combination of recycled textile and paper insulation and clear IGU Low-E window glazing has an OTTV value of 24.89 W/m2 which is lower than the standard in Indonesia (35 W/m2). Meanwhile, the cooling energy usage shows an energy consumption of 1.14% lower, but it did not achieve the 5% reduction target. Therefore, further intervention on other parts of the building envelope, such as the roof and floor, should be observed to achieve higher energy-saving potential.
Co-Authors Abral, Hairul Adi Winarta, Adi Agus Pamitran, Agus Ali, Firdaus Anhar Riza Antariksawan Anhar Riza Antariksawan Ardian Roekettino Ardian Roekettino, Ardian Ary Maulana Bambang Suryawan Bambang Suryawan, Bambang Bayu Trianto Bayu Trianto, Bayu Cahyo Setyo Wibowo Cukup Mulyana Dedy Haryanto Dewantara, Annastya Bagas Dr.Anhar Riza Antariksawan Engkos K Erwin Prawiro, Erwin Fathoni, Andhy M Fathoni, Andhy M. Fitri Wahyuni Gandjar Kiswanto Gerry Julian Hakim, Imansyah Ibnu Hendrayanto, Priska A. Hendri D.S. Budiono I Made Kartika D James Julian Kartika D, I Made Khairu Rezqi Luh Putu Ratna Sundari M. Hadi Kusuma Mohammad Adhitya, Mohammad Muhamad Asvial Muhammad Amin Muhammad Amin Mukhsinun Hadi Kusuma Mulya Juarsa Muthiah Hakim Hadini Ova Candra Dewi Putra, Gerardo Janitra Puriadi RA. Koestoer Ramadhan, Ranggi S. Rezqi, Khairu Riana Ayu Kusumadewi Ridho Irwansyah Riska Khalisa Rosari Saleh Setyo Sarwanto Moersidik Shafira Budiningsih Sholahudin Siregar, Yasmine Karenita Sucipta Laksono Surip Widodo Tika Hanjani Wayan Nata Septiadi Wayan Nata Septiadi Wibowo, Cahyo Setyo Widi Ajeng Luthfiyya