Adi WinartaPoliteknik Negeri Bali · Mechanical Engineering
Adi Winarta
Doctor of Engineering
About
41
Publications
20,401
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121
Citations
Introduction
Adi Winarta currently works at the Refrigeration & Air Conditioning Study Program, Politeknik Negeri Bali. Adi does research in Heat Pipe Technology, Thermoelectric and Phase Change Material. Their current project is 'Pulsating Heat Pipe as high heat flux cooling" and Bio Phase Change Material'.
Skills and Expertise
Additional affiliations
December 2008 - present
Education
September 2014 - August 2018
August 2005 - July 2007
September 1996 - October 2001
Publications
Publications (41)
Data collection using thermocouple sensors in low-cost data acquisition is prone to noise interference, which could reduce the data quality. Noise sources such as cold junction compensators, electromagnetic interference, and Johnson noise can significantly affect the reliability and accuracy of conventional measurements. This study aims to improve...
Measurement of aerodynamic forces and moments is very important in the aviation, aeronautical and automotive industries. A force balance is used to measure the aerodynamic load acting on the test model. Previous research on force balance has been primarily conducted through experimental methods, which requires a demonstration of the balance's stren...
Air conditioning (AC) systems are the main energy-significant services in hotel buildings. There is, therefore, remarkable potential to increase energy efficiency use of the hotel AC systems by optimization of both their system selection and operational characteristics. This paper presents an inclusive evaluation of commercial AC systems that can b...
Thermal energy storage using phase change material (PCM) is considered a promising technology for future energy needs due to its low-cost and high storage capacity under isothermal conditions. Supercooling of phase change materials (PCM) during the transition process from liquid to solid is a major problem in thermal energy storage, which reduces e...
In a particular application, thermoelectric refrigeration has an unrivaled excellence which other refrigeration systems may fail to accomplish it. Especially in application related in medical purposes. An accurate temperature stability is essential for this application. This study examined the performance of a thermoelectric cooler box with a cold...
The global contribution of hotel buildings to energy consumption continues to increase. Among hotel services, the energy consumed by cooling and heating systems can exceed 50% of the total energy use. For the purpose of energy conservation, five cooling and heating systems have been investigated. The aim is to investigate the most energy efficient...
Thermal energy storage (TES) using phase change materials (PCM) is very promising to meet future energy needs because of its high storage capacity and low cost. This study aims to develop Jatropha oil as a new candidate for solid-liquid latent heat energy storage for cold storage applications. The characteristics of Jatropha oil as a candidate for...
Abstrak Penyimpanan energi termal berbasis phase change material (PCM) sebagai material penyimpan energi dianggap sebagai teknologi yang menjanjikan untuk memenuhi kebutuhan energi di masa depan karena biayanya yang rendah dan kapasitas penyimpanan yang tinggi pada kondisi isotermal. Penyimpanan energi termal menjadi komponen yang tak terelakkan da...
Meningkatnya permintaan energi global, menipisnya sumber daya energi fosil, dan perubahan iklim adalah kenyataan yang tidak dapat disangkal. Sistem refrigerasi jenis chest freezer adalah salah satu peralatan elektronik yang banyak digunakan di rumah serta industri. Penggunaan sistem refrigerasi terus meningkat, yang menegaskan bahwa sejumlah besar...
Recent research shows great interest in increasing energy efficiency of a refrigeration system and finding appropriate configurations to optimize its performance. One main component in the refrigeration system is compressor. Therefore, the compressor plays an important role in a refrigeration system for energy performance optimization. The study is...
Thermoelectric refrigeration system is considered environmentally friendly because it does not use refrigerants which have huge potential for damaging the ozone layer. In this experimental work, a vapor chamber heat sink was used to absorb heat at the hot side of Peltier module of the cooler box. The cooler box has 215 mm × 175 mm × 130 mm of inner...
Thermoelectric refrigeration system is considered environmentally friendly because it does not use refrigerants which have huge potential damaging the ozone layer. In this experimental work, u-shape heat pipe with heat sink was charged with methanol working fluid with different filling ratios to observe its effect on the thermoelectric performance....
Thermoelectric cooler is one type of refrigeration system that is environmentally friendly because it does not use refrigerants which have potential damaging the ozone layer. In this study, an experimental performance of thermoelectric refrigerator using fan and without fan in this study is presented. The result shows that the cold side temperature...
In this paper, the experimentally research about the heat transfer characteristic of the OHP using methanol and ethanol working fluid for heat recovery implementation. The OHP was manufactured with l eff of approximately 500 mm, which is not typically used in previous OHP data experimental tests. The results of this experimental data will provide m...
As a family of heat pipes, oscillating
heat pipes have many additional unique operating parameters. This paper
examined the heat transfer characteristics of an oscillating heat pipe that has
an effective length (leff)
of 500 mm and uses methanol as the working fluid. The effective length of 500
mm is not typically used in previous experimental setu...
The development of cold storage in Indonesia is less than satisfactory. As the second highest producers of fishery and aquaculture products in the world, the country has only 2 out of total 6 of its ocean fishing ports possess cold storage facilities. Indonesia is also on the list of low index cold storage markets with abundant natural resources. T...
The multipurpose Irradiator in Indonesia with capacity of 2 MCi Co-60 radioactive source was built to support food security. When not operated, the Co-60 is stored in the pool to keep the radiation not to exposure to environment. The decay heat generation of Co-60 could increase the pool water temperature. To improve safety especially during SBO co...
Nowadays, keeping environment at comfort zone with conventional cooler become expensive, especially in wide and semi outdoor spaces. Evaporative cooler which offer a healthy, non-harmful materials, and low cost can be an alternative to keep environment healthy and comfortable. The objective of this experiment is to determine and compare the perform...
This study was conduct to identify the effectiveness and heat recovery values of heat pipe heat exchangers (HPHEs) in heating ventilating air conditioning (HVAC) ducting systems. HPHEs are passive modules which provide the energy recovery function in HVAC systems. In this research the HPHE module consist of 42 heat pipe tubes equipped with 120 wavy...
Oscillating Heat Pipe (OHP) is a passive heat exchanger operating on two phase flow principle. As one of the newest members of the heat pipe family, OHP has a complicated operating mechanism of working fluid flow. OHP is a potential device, which can be used for saving energy and cost. Although, OHP is a promising two-phase heat transfer device wit...
Solar energy utilized with solar panel is a renewable energy that needs to be studied further. The site nearest to the equator, it is not surprising, receives the highest solar energy. In this paper, a modelling of electrical characteristics of 150-Watt peak solar panels using Boltzmann sigmoid function under various temperature and irradiance is r...
Heating, Ventilation, and Air Conditioning (HVAC) system in hospital's clean room is required to continue working for 24 hours to provide the ideal air quality for the activities therein. This causes a huge amount of energy consumption in hospital buildings itself. This study aims to determine the effectiveness and heat recovery of Heat Pipe Heat E...
Heat generated in an electric motor can increase the operating temperature. The excessive operating temperature will reduce the electric motor performance and shorten the service life. An appropriate thermal management system is required to reduce the electric motor operating temperature. The objective of this study is to determine the thermal perf...
As one of the two-phase heat transfer technology, Oscillating Heat Pipe (OHP) gains popularity in heat pipe technology recently. OHP has an excellent performance, simple structure, low production cost and high flexibility for a wide range of applications. OHP is also suitable for applications in the waste heat recovery system. This paper experiment...
The hospitals Heating, Ventilation, and Air Conditioning (HVAC) systems consumed large amounts of energy due to the specific requirements that must be met to ensure that environmental conditions were healthy, convenient, and safe. Therefore, to reduce electricity consumption without sacrificing comfort and improving indoor air quality, the utilizin...
Abstrak Sebagai salah satu teknologi transfer kalor dua phasa sistem pasif, Oscillating Heat Pipe (OHP) mempunyai daya tarik tersendiri dalam perkembangan teknologi pipa kalor (heat pipe). Pemanfaatan OHP sangat beragam mulai dari aplikasi pendingin elektronika, heat exchanger, solar kolektor sampai pada teknologi pesawat terbang dan ruang angkasa....
Abstrak Temperatur air yang dihasilkan pada sistem pemanas air domestik biasanya berkisar antara 55-65°C. Phase Change Material (PCM) sebagai salah satu teknologi thermal storage dapat dimanfaatkan untuk meningkatkan efisiensi penggunaan energi listrik pada sistem pemanas air. PCM memanfaatkan kalor laten untuk menyimpan energi dan melepaskannya pa...
Abstrak Temperatur air yang dihasilkan pada sistem pemanas air domestik biasanya berkisar antara 55-65°C. Phase Change Material (PCM) sebagai salah satu teknologi thermal storage dapat dimanfaatkan untuk meningkatkan efisiensi penggunaan energi listrik pada sistem pemanas air. PCM memanfaatkan kalor laten untuk menyimpan energi dan melepaskannya pa...
Domestik refrigerator digunakan untuk menyimpan makanan beku (frozen food) yang
mempunyai temperatur sekitar -18ºC dan juga makanan dingin (chilled food) berkisar 4ºC. Kedua level
temperatur diatas biasanya dicapai dengan evaporator tersendiri. Evaporator pada mesin refrigerator domestik biasanya diletakkan pada bagian freezer atau bagian paling at...
Abstrak: Penelitian ini dimaksudkan untuk menerapkan ilmu teknologi persuasif pada pendingin ruangan (AC) dalam mendorong perilaku hemat energi bagi masyarakat Indonesia yang berbudaya kolektivistik. Tujuan dari penelitian ini adalah untuk merancang sebuah remote controller AC yang terintegrasi dengan komputer dan membuat animasi memakai pendekatan...
Questions
Question (1)
I am building a vacuum filling system for heat pipe fluid charging. I am using five 1/8 inch ball valves and stainless steel tubing as the construction and Pirani Gauges as the pressure sensor. But until now the system could not stand for the very fine leaks. I don't have any helium leak detector because out of my budget. Is there anything I can do to minimize or stop the leaks? My vacuum goal is 0.1 Pa. The system has 4 ball valve and one 3 way valve all connected with stainless steel tubing and tee.
