Results 21 to 30 of about 724 (168)

Performance Improvement of OTEC‐ORC and Turbine Based on Binary Zeotropic Working Fluid

International Journal of Chemical Engineering, Volume 2023, Issue 1, 2023., 2023
In this paper, the composition of binary nonazeotropic working fluids is explored from the perspective of improving OTEC‐ORC efficiency, and the turbine is designed to accommodate with the working fluid. It is found that the OTEC‐ORC using a R152a/R32 mixture as the working fluid is significantly higher than the OTEC‐ORC thermal efficiency and system ...
Qingfen Ma, Jie Huang, Zezhou Gao, Hui Lu, Hongfeng Luo, Jingru Li, Zhongye Wu, Xin Feng, Maciej Jaskulski   +8 more
wiley   +1 more source

Analysis of the Potential of Solar‐Assisted Heat Pumps: Technical, Market, and Social Acceptance Aspects

Solar RRL, Volume 6, Issue 8, August 2022., 2022
Solar‐assisted heat pumps have the potential to increase the share of renewables in the energy systems and the flexibility of smart grids. An assessment covering technical, economic, and social aspects is given to allow a holistic overview on the application of such systems.
Valeria Palomba, Giuseppe E. Dino, Andrea Frazzica   +2 more
wiley   +1 more source

Experimental study on power generation plant of a 1 kW small‐scale Organic Rankine Cycle system using R290

Energy Science &Engineering, Volume 10, Issue 3, Page 740-751, March 2022., 2022
Experimental study on a power generation plant of a 1 kW small‐scale Organic Rankine Cycle system using R290 has been investigated. Effect of pressure drop and heat source temperature is examined. The pressure drop exhibits a relatively sensitivity than heat source temperature about the system performance.
Feng Wang, Wenzhong Gao, Gen Li, Zhen Tian, Xiaozhong Wang   +4 more
wiley   +1 more source

Experimental comparison between R134a/R744 and R438A/R744 (drop‐in) cascade refrigeration systems based on energy consumption and greenhouse gases emissions

Energy Science &Engineering, Volume 9, Issue 12, Page 2281-2297, December 2021., 2021
This experimental study evaluates the energy performance and climatic changes of a cascade cooling system operating with the R134a/R744 pairs (cooling capacity of 4.5‐6 kW) and R438A/R744. Abstract This experimental study evaluates the energy performance and climatic changes of a cascade cooling system operating with the R134a/R744 pairs (cooling ...
Marcus Vinícius Almeida Queiroz, Frank William Adolfo Blanco Ojeda, Muhammad Amjad, Fahid Riaz, Chaudhary Awais Salman, José Alberto Reis Parise, Enio Pedone Bandarra Filho   +6 more
wiley   +1 more source

CFD-Entropy generation analysis of refrigerant-based nanofluids flow in a tube [PDF]

MATEC Web of Conferences, 2020
The present paper aims to numerically investigate the flow, heat transfer and entropy generation of some hydrocarbon based nanorefrigerants flowing in a circular tube subject to constant heat flux boundary condition.
Zohud Mohammed, Ouadha Ahmed, Benzeguir Redouane   +2 more
doaj   +1 more source

Beyond Temperature Glide: The Compressor is Key to Realizing Benefits of Zeotropic Mixtures in Heat Pumps

Energy Technology, Volume 9, Issue 4, April 2021., 2021
How to select zeotropic mixtures to increase heat pump efficiency? Why has a well‐matching temperature glide not been sufficient to realize efficiency gains in practice? This article aims to provide answers by showing the mixture impact on the compressor and presenting a mixture selection criterion beyond the temperature glide.
Dennis Roskosch, Valerius Venzik, Johannes Schilling, André Bardow, Burak Atakan   +4 more
wiley   +1 more source

Alternative blends of CO2 for transcritical refrigeration systems. Experimental approach and energy analysis [PDF]

, 2023
As a natural refrigerant, Carbon Dioxide (CO2) has been extended in almost all refrigeration fields due to its environmental friendliness, high availability, and high technological development in the main components of the cycle.
Cabello López, Ramón, Llopis, Rodrigo, Nebot-Andres, Laura, Sánchez García-Vacas, Daniel, Vidan-Falomir, Francisco   +4 more
core   +1 more source

Condensation of Hydrocarbons in Compact Smooth and Microfinned Tubes

Energies, 2021
A database for flowing condensation of three hydrocarbons, namely propane (R290), isobutane (R600a), and propylene (R1270), is extended by experimental tests in a smooth tube and two microfinned tubes with an increase of heat exchange area of 1.51 and 2 ...
Ehsan Allymehr, Ángel Álvarez Pardiñas, Trygve Magne Eikevik, Armin Hafner   +3 more
doaj   +1 more source

Performance computation of window air conditioner with very low GWP near azeotropic refrigerant mixtures as a drop in Substitutes to R22

MATEC Web of Conferences, 2018
The principal objective of the present study is to compute the thermodynamic performance of window air conditioner based on standard vapour compression refrigeration cycle using R22, R407C and nineteen refrigerant mixtures.
Vali Shaik Sharmas, Setty Talanki Puttaranga, Babu Ashok   +2 more
doaj   +2 more sources

Experimental Analysis of Alternate Refrigerant Mixtures in Refrigeration System [PDF]

E3S Web of Conferences
This study focuses on conducting experimental analyses to assess the impact of alternative refrigerant blends within a vapor compression refrigeration system, with the aim of replacing the existing R134a refrigerant.
R Ragavendiran, A Gowrishankar, Hussaini M Mohammadha, G Ravivarman, K N Gunasekaran, Uday Kiran Kasi, R Girimurugan   +6 more
doaj   +1 more source