نتایج جستجو برای: r1234yf

تعداد نتایج: 140  

Journal: :Journal of physics 2023

Abstract Linear compressors are advantageous in terms of miniaturization, high efficiency, and continuous operation without a crank mechanism. The drop-in replacement for R134a domestic refrigerators is R1234yf. This study aims to investigate the linear compressor thermodynamic performance vapour compression system with R1234yf by modelling measuring key parameters such as pressure-volume (P-V)...

پایان نامه :دانشگاه الزهراء علیها السلام - دانشکده فنی 1394

در این پژوهش یک سیستم تبرید متوالی تراکمی-جذبی با اجکتور که برای تامین انرژی مورد نیاز آن از کلکتور صفحه تخت استفاده می شود، ارائه شده است. در سیکل مورد مطالعه از چهار مبرد مختلف r134a، r1234yf، r1234zeو r407c در بخش تراکمی و نانوسیال اکسید مس در آب برای زیرسیستم خورشیدی استفاده شده است. در این سیکل پس از بررسی عملکرد ساعتی آن در طول شبانه روز با استفاده از نرم افزار ees به بررسی ترمودینامیکی و...

Journal: :Energies 2021

In this work, which is related to the current European Parliament Regulation on restrictions affecting refrigeration, four new three-component refrigerants have been proposed; all were created using low Global Warming Potential(GWP) synthetic and natural refrigerants. The considered mixtures consisted of R32, R41, R161, R152a, R1234ze (E), R1234yf, R1243zf, RE170. These theoretically tested wit...

Journal: :Energy Conversion and Management 2022

Due to the entry into force in 2014 of European F-Gas Regulation n° 517/2014 and subsequent Kigali amendment, phase-out medium high-GWP refrigerants has speeded up all refrigeration fields. The effect on plug-in or stand-alone systems meant that other environmentally friendly must replace R134a with low ultra-low GWP maintaining same operating conditions reducing energy consumption. Extended ex...

Journal: :Sustainability 2023

The use of heat pumps is increasing worldwide, and knowledge their properties becoming more important. Although numerous tests regarding have been performed, due to the large number influencing variables, entire range input parameters not covered, there no overall picture coefficient performance (COP) output parameters. This study extends existing research provides a much detailed comparison re...

Journal: :IOP Conference Series: Earth and Environmental Science 2020

Journal: :Sustainability 2023

Global warming is one of the most dangerous ecological issues facing globe. Refrigerants are a major contributor to global warming. This investigation mainly focuses on analysis greener nanorefrigerant. Nanorefrigerant can improve efficiency refrigeration and air conditioning systems that use vapor compression. In present investigation, mathematical computational methods used assess heat transf...

Journal: :Journal of The Faculty of Engineering and Architecture of Gazi University 2023

Buhar sıkıştırmalı soğutma sistemlerinde iş akışkanı olarak kullanılan R134a, küresel ısınmaya karşı alınan tedbirler kapsamında kullanımına son verilmesi planlanan soğutucu akışkanlardandır. Bu çalışmada; deneysel veriler yardımıyla EES programında geliştirilen teorik model aracılığıyla mekanik bir buhar sisteminde R134a ve alternatifleri R1234yf, R450a, R513a R515b akışkanlarının kullanımları...

Journal: :IOP Conference Series: Materials Science and Engineering 2021

Journal: : 2022

Researchers have been motivating by the global warming challenge to develop alternatives substances compounds that contribute this problem. The refrigerant R134a (HFC134a) has identified as one of most environmentally damaging gases. As a result, R1234yf employed in air conditioning systems substitute R134a. condensation heat transfer coefficient (HTC) refrigerants and was measured on smooth st...

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