Results 51 to 60 of about 5,061 (219)

Experimental performance studies of small wall room air conditioner for R410A retrofitted with R290

MATEC Web of Conferences, 2018
An original R410A wall room air conditioner was retrofitted with R290 for performance experiments. The R410A wall room air conditioner has a COP and a refrigerating capacity 6.0597and 1929.3 W respectively.
Fajar TK Berkah, Nicolas Dipto I Geraldus   +1 more
doaj   +1 more source

Subcooled flow boiling heat transfer of ethanol aqueous solutions in vertical annulus space [PDF]

, 2012
The subcooled flow boiling heat-transfer characteristics of water and ethanol solutions in a vertical annulus have been investigated up to heat flux 132kW/m2.
Peyghambarzadeh S.M., Sarafraz M.M., Vaeli N.   +2 more
core   +1 more source

Advances in Research and Development of Transcritical CO2 Heat Pump Systems Intergrated With Sustainable Energy and Energy Storage: Applications and Perspectives

IET Smart Energy Systems, Volume 1, Issue 2, Page 168-200, September 2025.
This review focuses on the recent advances in the key research and technology development of transcritical CO2 heat pumps and integrated energy systems including sustainable ‘green’ heating, energy storage, electro‐thermal storage, waste heat recovery and disruptive electrification of renewable energy, combined heating and power, and new hybrid systems.
Lixin Cheng, Hongzhi Li, Haijun Wang
wiley   +1 more source

Analisis Performansi Sistem Water Chiller Setelah Proses Retrofit R22 menjadi R290 dengan Variasi Massa Pengisian R290

Prosiding Industrial Research Workshop and National Seminar
Hidrokarbon merupakan refrigeran alami yang memiliki dampak lingkungan yang jauh lebih rendah dibandingkan refrigeran hydrochlorofluorocarbons (HCFC) dan hydrofluorocarbon (HFC). Penggunaan R290 sebagai refrigeran alternatif dan ramah lingkungan dilakukan karena memiliki nilai ozone depletion potential (ODP) nol dan global warming potential (GWP) yang ...
Sandy Karan, Triaji Pangripto Pramudantoro, Rizki Muliawan   +2 more
openaire   +1 more source

Energy and Exergy Efficiency Analysis of an Ejector‐Expansion Refrigeration Cycle Using the Working Fluid R134a and Its Potential Substitutes

Energy Science &Engineering, Volume 13, Issue 5, Page 2389-2400, May 2025.
ABSTRACT This paper proposes an ejector‐expansion refrigeration cycle (EERC) with two evaporating temperatures to recover partial expansion work and greatly reduces the throttling loss of the other expansion valve connected to the evaporator compared with the conventional bievaporator refrigeration cycle (CBEC).
Xiaoqin Liu, Weibin Wang, Jianyong Wang
wiley   +1 more source

Experimental Research on Performance of Small Room Air Conditioner with R290

Zhileng xuebao, 2006
The performance of small room air conditioners using R290 as a substitute for R22 was studied in this study.Tests were conducted for a KF-26GW/K air conditioner and a high EER KFR-27GW/E air conditioner.The charging quantity,the lengths of single ...
肖洪海, 张桃, 胡艳
doaj   +2 more sources

The role of a disulfide bridge in the stability and folding kinetics of Arabidopsis thaliana cytochrome c6A [PDF]

, 2011
Cytochrome c 6A is a eukaryotic member of the Class I cytochrome c family possessing a high structural homology with photosynthetic cytochrome c 6 from cyanobacteria, but structurally and functionally distinct through the presence of a disulfide bond and
Arslan, Babul, Barker, Bartalesi, Beasty, Bertini, Betz, Bialek, Borgia, Brems, Carter, Chen, Chida, Christopher J. Howe, Cohen, Colon, Colon, Derek S. Bendall, Ellman, Elove, Feige, Gianni, Guidry, Gupta, Hogg, Howe, Jody M. Mason, Jonathan A.R. Worrall, Lange, Lange, Marcaida, Mason, Mason, Merchant, Mines, Molina-Heredia, Moore, Myers, Ogawa, Pace, Pace, Parrini, Pascher, Ptitsyn, Roder, Russell, Russell, Santoro, Satoh, Sauder, Schlarb-Ridley, Schmidt, Sosnick, Tezcan, Travaglini-Allocatelli, Travaglini-Allocatelli, Travaglini-Allocatelli, Ullah, Ullah, Wastl, Wastl, Wastl, Williams, Worrall, Worrall   +64 more
core   +1 more source

Broadband Receiver for VLF On‐Orbit Wave‐Particle Interaction Experiments

Journal of Geophysical Research: Space Physics, Volume 130, Issue 3, March 2025.
Abstract A broadband, multi‐channel Very Low Frequency (VLF) radio receiver (BBR), developed as a sensitive analog, vector wave receiver for whistler‐mode signals in the VLF range, was successfully flown on the Air Force Demonstration Science Experiment (DSX) Mission to Mid‐Earth Orbit (Johnston et al., 2023, https://doi.org/10.1029/2022JA030771).
I. R. Linscott, U. S. Inan, D. S. Lauben, W. M. Farrell, J. Payne, B. Mossiwir, C. Wang, K. Lee, W. R. Johnston, M. J. Starks, J. P. McCollough, J. C. Sanchez, Y.‐J. Su   +12 more
wiley   +1 more source

Simulation study on performance of a dual-source hybrid heat pump unit with alternative refrigerants

Energy and Built Environment, 2020
To solve the problems of single heat source heat pump systems in severe cold regions, a dual-source hybrid heat pump unit (DSHHPU) is proposed. The mathematical models of the DSHHPU when charging R134a or its alternative refrigerants R32, R290 and R600a ...
Chenguang Bai, Zongwei Han, Haotian Wei, Xiaomei Ju, Xinwei Meng, Qi Fu   +5 more
doaj   +1 more source

A Correlation‐Based Prediction Method of Heat Transfer Coefficients for Flooded Evaporation on Enhanced Tubes

Chemie Ingenieur Technik, Volume 97, Issue 1-2, Page 43-50, February 2025.
An enhanced tube which is optimized for pool boiling was examined with the refrigerants R134a, R1234ze(E), and propane. The measured heat transfer coefficient is compared to literature‐based correlations and also the transferability. For a better prediction of the shell‐side heat transfer coefficient a new correlation is proposed.
Marco Möhrle, Jennifer Frick, Christoph Krieger, Karsten Müller   +3 more
wiley   +1 more source