Results 31 to 40 of about 72,019 (264)

Performance comparison of cooling systems using R410a and RE170 as working fluids at various condensing temperature [PDF]

BIO Web of Conferences
In addition to being used as a fuel and propellant, dimethyl ether (RE170) can also be used as an environmentally friendly refrigerant. Apart from having zero ozone depletion potential (ODP), this compound also has a very low global warming potential ...
Setyawan Andriyanto, Mitrakusuma Windy H., Simbolon Luga M.   +2 more
doaj   +1 more source

Modeling and Thermodynamic Analysis of Solar Collector Cogeneration for Residential Building Energy Supply

Journal of Engineering, 2022
Concerns about limited energy resources and environmental problems are growing. One of the solutions to increase energy efficiency is to produce it sparsely. In this regard, cogeneration systems are of particular importance. The home sector is one of the
Ghassan F. Smaisim, Azher M. Abed, Salema K. Hadrawi, Ali Shamel   +3 more
doaj   +1 more source

Numerical analysis of flow and heat transfer enhancement in a horizontal pipe with P-TT and V-Cut twisted tape

Case Studies in Thermal Engineering, 2018
In this work, forced convection heat transfer through a horizontal pipe built-in with/without twisted tape-inserts is numerically studied under a uniform heat flux condition. Water is used as a working fluid.
Azher M. Abed, Hasan Sh. Majdi, Zainab Hussein, Doaa Fadhil, Ammar Abdulkadhim   +4 more
doaj   +1 more source

Improving the performance of air conditioning unit by using a hybrid technique

MethodsX, 2022
An Air Conditioning Unit with magnetic field and different tubes was designed, fabricated and evaluated in this study. The Effect of magnetic field and different types of tubes on the performance of Air Conditioning was studied experimentally.
Kayser Aziz Ameen, Husam Abdulrasool hasan, Mustafa J. Al-Dulaimi, Azher M. Abed, Haidar F. Al-Qrimli   +4 more
doaj   +1 more source

A numerical investigation of the increase in heat transfer in a half-cylindrical container filled with phase change copper rods

Case Studies in Thermal Engineering, 2022
Phase change materials (PCMs) are capable of storing and removing a significant quantity of latent heat from heating storage systems. PCMs such as paraffin wax are used because they store a large amount of energy in a relatively small space while ...
Ali Basem, Karrar A. Hammoodi, Ammar M. Al-Tajer, A.M. Mohsen, Ihab Omar   +4 more
doaj   +1 more source

Flow characteristics and velocity fields of a front opening unified pod at open door condition

Case Studies in Thermal Engineering, 2020
Particle contamination decreases product quality in semiconductor industries. Nowadays, the size of the chips and features has significantly reduced; thus increasing the importance of moisture removal from front opening unified pods during manufacturing ...
Tee Lin, Omid Ali Zargar, Dexter Lyndon Sabusap, Oscar Juiña, Tzu-Chieh Lee, Shih-Cheng Hu, Graham Leggett   +6 more
doaj   +1 more source

Seasonal coefficient of performance of air-to-air heat pump and energy performance of a building in Poland [PDF]

E3S Web of Conferences, 2019
The article discusses the problem of determining for air heat pumps the seasonal efficiency of energy production necessary to determine the energy performance of a building.
Kowalski Piotr, Szałański Paweł
doaj   +1 more source

The Optimal Design of Heat Sinks: A Review [PDF]

Journal of Applied and Computational Mechanics, 2020
Heat sinks are used in industrial equipment to dissipate the excess heat from their heat-generating parts to the ambient. In the last few years, efforts on manufacturing electronic or mechanical devices with less weight, space, and lower cost were spent.
Hussein T. Dhaiban, Maha A. Hussein
doaj   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

FEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source

Effectiveness and Discussion of Ventilation Design with Automatic Revolving Window

MATEC Web of Conferences, 2016
This paper aims to improve and discuss the effectiveness of automatic revolving window ventilation on human comfort, where the temperature sensor mounted indoors gives the signal to start the stepping motor of the revolving window.
Chang Jing Yi, Kuan Yean Der, Lan Chun Ching, Li Hsing Ju, Hsu Yu Kun, Chen Chih Yao, Shen En Ting, Chen Chih Yen   +7 more
doaj   +1 more source