Results 31 to 40 of about 14,552 (256)

Performance Investigation of Eco‐Friendly Refrigerant Mixtures as an Alternative to R134a in Vapour‐Compression Refrigeration System

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT The growing impacts of climate change and energy scarcity demand environmentally sustainable refrigeration solutions. This study investigates eco‐friendly refrigerants (R152a, R290 and R600a) and their optimized ternary mixture as alternatives to R134a. Four blend compositions were analysed using experimental testing and REFPROP 10.0 modelling
M. Periyasamy, P. Senthilkumar
wiley   +1 more source

Refrigerant Charge Prediction of Vapor Compression Air Conditioner Based on Start-Up Characteristics

Applied Sciences, 2021
Refrigerant charge faults, which occur frequently, increase the energy loss and may fatally damage the system. Refrigerant leakage is difficult to detect and diagnose until the fault has reached a severe degree.
Yechan Yun, Young Soo Chang
doaj   +1 more source

Investigation of a single vapour bubble confined between superheated or subcooled parallel plates [PDF]

, 2009
This paper was presented at the 2nd Micro and Nano Flows Conference (MNF2009), which was held at Brunel University, West London, UK. The conference was organised by Brunel University and supported by the Institution of Mechanical Engineers, IPEM, the ...
2nd Micro and Nano Flows Conference (MNF2009), Barber, J, Sefiane, K, Wang, Y, Wilson, S   +4 more
core  

Study on Natural Gas Decarbonization Process Based on CO2 Desublimation Characteristics

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Natural gas decarbonization is a crucial processing step. In this study, the snow separation technology for removal of carbon dioxide in natural gas based on CO2 desublimation characteristics was introduced. The phase equilibrium calculation of CH4‐CO2 and N2‐CO2 system was carried out by using cubic equations of states (EOSs), and identified ...
Haiqin Wang, Jushi Cai, Zubin Zhang, Qishen Wu   +3 more
wiley   +1 more source

Effects of LLC Flow Characteristics and Surface Roughnesses on Nucleate Boiling Heat Transfer Mechanisms in IC Engine Cooling System

International Journal of Automotive Engineering, 2021
To improve internal combustion engine cooling systems, it is required to utilize the nucleate boiling heat transfer. Previous studies revealed it is affected by surface roughness, flow velocity, and degree of subcooling.
Kakeru Nakamura, Takashi Suzuki, Haoyu Chen, Ayumi Homma, Takaki Nakaya, Alan John, Tatsuya Yoshida, Hiroki Okamura, Yui Takamatsu, Mitsuhisa Ichiyanagi   +9 more
doaj   +1 more source

Alternative Refrigerants in Adiabatic Capillary Tubes [PDF]

, 1996
This study examines the mass flow rate of refrigerants in adiabatic capillary tubes, with an emphasis on the nature of the metastable region for both single component refrigerants and mixtures. The metastable region of a capillary tube was found to be
Dunn, W.E., Meyer, J.J.
core  

High‐Temperature Heat Pump Test Bench with n‐Butane (R‐600) Generating Steam

Chemie Ingenieur Technik, EarlyView.
This work involves building a test bench for a high‐temperature heat pump (HTHP) and analyzing the measurements. The focus is on steam generation using an HTHP to decarbonize process steam demand. The findings indicate that stable steam generation is possible, providing a higher heat transfer coefficient in the heat pump's condenser.
Sebastian Benkert, Lukas Joos, Ursula Wittstadt, Torsten Will, Andreas Burger, Lena Schnabel, Stefan Henninger, Thorsten Klahm   +7 more
wiley   +1 more source

Experimental and Numerical Study of Film Boiling Around a Small Nickel Sphere

Fluids
This work—mixing an original experimental approach, as well as numerical simulations—proposes to study film boiling modes around a small nickel sphere. While dealing with a simple looking phenomenon that is found in many industrial processes and has been
Charles Brissot, Léa Cailly-Brandstäter, Romain Castellani, Elie Hachem, Rudy Valette   +4 more
doaj   +1 more source

A subcooled void model

Applied Mathematical Modelling, 1987
Abstract This paper is concerned with the development of an analytical model to determine the subcooled boiling characteristics under forced convective conditions over a wide range of mass flows and subcoolings. This model considers the two regions of subcooled boiling: local boiling with stationary bubbles (high subcooling), and local boiling with ...
Sami, S.M., Duong, T.
openaire   +1 more source

Optimization of Heat Exchanger Design Parameters for Hydrocarbon Refrigerant Systems [PDF]

, 2004
Hydrocarbon refrigerants (HC's) are one alternative to hydrofluorocarbons (HFC???s) since they have zero ozone depletion potential and negligible global warming potential.
Bullard, C.W., Jain, S.
core