Results 11 to 20 of about 565,432 (329)

The performance of room air conditioner with Cooling Seasonal Performance Factor (CSPF) in Jakarta and Bandung, Indonesia [PDF]

E3S Web of Conferences, 2023
Cooling Seasonal Performance Factor (CSPF) is one of methods for measuring the performance of a room air conditioner to assess its energy efficiency and, therefore, its effect on climate change and environmental impact.
Setyawan Andriyanto, Simbolon Luga Martin, Najmudin Hafid, Julyanti Annisa Ayu, Kurniasetiawati Annisa S., Susilawati   +5 more
doaj   +1 more source

Performance of a room air conditioner under varied duration of system evacuation [PDF]

E3S Web of Conferences, 2023
Refrigeration system evacuation is one of the most important steps in achieving refrigeration or air conditioning system quality. This procedure is used to remove water vapor and non-condensable gas from the pipeline and the heat exchangers that can be ...
Simbolon Luga Martin, Najmudin Hafid, Setyawan Andriyanto, Septiany Risma   +3 more
doaj   +1 more source

Uniformity and energy evaluation of equal cross-section ventilation system(ECVS) for long tunnel in underground buildings

Energy and Built Environment, 2022
Uniform ventilation is important for the safety of long tunnel in underground buildings, it is difficult to install the large size air duct to ensure the centerline of each cross-section of the traditional variable cross-section ventilation system(VCVS ...
Qi Deng, Huaican Liu, Yecong He, Tengjin Huang, Huan Zhou, Ying Bao   +5 more
doaj   +1 more source

Experimental Study of Vibration on Pipe Conveying Fluid at Different End Conditions for Different Fluid Temperatures [PDF]

Engineering and Technology Journal, 2019
Dynamic behavior of a copper pipe conveying fluid at different fluid temperatures is investigated experimentally. Three types of supports are used, which are simply support - simply support, fixed – fixed support and fixed – free support.
Kayser Ameen, Mustafa Al-Dulaimi, Ali Hatem   +2 more
doaj   +1 more source

Tribological behaviors of laser textured surface under different lubrication conditions for rotary compressor

Scientific Reports, 2023
Tribological behaviors of laser textured surface with elliptical dimples were experimentally compared with that of the smooth one under different lubrication conditions, including the poor-oil, rich-oil and dry lubrication.
Shaopeng Ding, Huijun Wei, Ouxiang Yang, Liying Deng, Di Mu   +4 more
doaj   +1 more source

The Tribological Behavior of Cast Iron by Laser Surface Texturing under Oil-Lubricated Initial Line Contact for Rotary Compressor

Lubricants, 2023
The tribological behaviors of cast iron by laser surface texturing were experimentally compared with the behavior of untextured by unidirectional rotary sliding friction and wear tests under oil-lubricated initial line contact.
Shaopeng Ding, Yusheng Hu, Huijun Wei, Di Mu, Xiangzhi Zhan, Jun Wang, Ouxiang Yang, Jia Xu   +7 more
doaj   +1 more source

Cooling panel wall system with difference types of cooling mediums [PDF]

, 2020
Global warming has caused worldwide average surface temperature to rise about 0.74oC during the past 100 years, which is partly aggravated by air-conditioning that releases chlorofluorocarbons (CFCs) and forming a vicious cycle.
Abd Majid, Masni, Abdul Hamid, Noor Azlina, Abdullah, Siti Radziah, Adnan, Suraya Hani, Ali, Noorwirdawati, Ismail, Noorli, Jamellodin, Zalipah, Mohamad Hashim, Eny Nor Syahira, Salleh, Norhafizah   +8 more
core   +1 more source

The influence of crop dryer operation parameters on the efficiency of energy recovery from extract air [PDF]

E3S Web of Conferences, 2019
Crop drying, especially maize drying, occurs at low external air temperatures, which are lower than the extract air temperature. Therefore, using heat exchangers, to recover thermal energy from the extract air to preheat the cold and dry external air ...
Przydróżny Edward, Przydróżna Aleksandra, Szczęśniak Sylwia, Walaszczyk Juliusz   +3 more
doaj   +1 more source

Detailed Analysis of the Causes of the Energy Performance Gap Using the Example of Apartments in Historical Buildings in Wroclaw (Poland)

Energies, 2023
This paper presents the results of measuring and calculating the final energy consumption for heating and domestic hot water preparation in six apartments located in pre-war tenement houses in Wroclaw (Poland).
Małgorzata Szulgowska-Zgrzywa, Ewelina Stefanowicz, Agnieszka Chmielewska, Krzysztof Piechurski   +3 more
doaj   +1 more source

Performance comparison of DME and R134a refrigerants in a room air conditioner: Effect of subcool and superheat [PDF]

E3S Web of Conferences
The demand for environmentally friendly refrigerants arises to anticipate two global environmental issues: global warming and climate change. The use of environmentally friendly refrigerants is one of the efforts to address these issues.
Setyawan Andriyanto, Mitrakusuma Windy Hermawan, Simbolon Luga Martin   +2 more
doaj   +1 more source