Results 31 to 40 of about 155 (132)

Cycle performance evaluation of various R134a/hydrocarbon blend refrigerants applied in vapor-compression heat pumps

Advances in Mechanical Engineering, 2019
Blend refrigerants combing hydrofluorocarbons and hydrocarbons are good substitutes to decrease the flammability of hydrocarbons while reducing the global warming potential of hydrofluorocarbons.
Liu Zhang, Jin-xiu Zhao, Li-fang Yue, Hong-xing Zhou, Chun-li Ren   +4 more
doaj   +1 more source

Enhanced Utilization of Coal Ash in Construction: Physicochemical Properties and Compressive Strength of Blended Cement and Geopolymer Mortar

Advances in Materials Science and Engineering, Volume 2026, Issue 1, 2026.
The properties of fly and bottom ashes produced by Morupule power stations in Botswana are analysed for their pozzolanicity. Furthermore, the influence of physical, chemical and microstructural properties of the ashes on the performance of compressive strength of fly ash–based blended cement and geopolymer mortar was evaluated.
Damilola O. Oyejobi, Ali A. Firoozi, Adekunle P. Adewuyi, Njideka M. Aguome, Rajashik Paul   +4 more
wiley   +1 more source

Multi-Objective Thermo-Economic Optimization of a Combined Organic Rankine Cycle (ORC) System Based on Waste Heat of Dual Fuel Marine Engine and LNG Cold Energy Recovery

Energies, 2020
In this paper, a combined organic Rankine cycle (ORC) system that can effectively utilize the cold energy of Liquefied Nature Gas (LNG) and the waste heat of dual fuel (DF) marine engine was proposed.
Zhen Tian, Yingying Yue, Yuan Zhang, Bo Gu, Wenzhong Gao   +4 more
doaj   +1 more source

Feasibility of R1270 as an Alternative Refrigerant to Replace R134a in Refrigerator [PDF]

Proceedings of the 6th UPI International Conference on TVET 2020 (TVET 2020), 2021
Ega Taqwali Berman, Muhammad Farhan Maulana, Devinda Naufal, Kamin Sumardi   +3 more
openaire   +1 more source

Navigating the contradictory dynamics of production and social reproduction in collectively owned agricultural enterprises in South Africa's land reform

Journal of Agrarian Change, Volume 24, Issue 3, July 2024.
Abstract The paper explores how beneficiaries of South Africa's land reform programme attempt to navigate the contradictory dynamics of production and social reproduction in collectively owned agricultural enterprises. The Mphuzanyoni Communal Property Association in KwaZulu‐Natal province farms with commercial beef herds and the Mayime Cooperative in ...
Brittany Bunce, Donna Hornby, Ben Cousins   +2 more
wiley   +1 more source

ENERGY EFFICIENCY, ENERGY SAVING POTENTIAL AND ENVIRONMENTAL IMPACT RESEARCH OF LPG CARRIER REFRIGERATION SYSTEM

Holodilʹnaâ Tehnika i Tehnologiâ, 2016
Nowadays energy efficiency improvement and global warming are issues of current interest because of the natural resources depletion and extreme climate change.
V. О. Bedrosov, M. G. Khmelniuk, O. Yu. Yakovleva   +2 more
doaj   +1 more source

A Theoretical Comparative Study of CO₂ Cascade Refrigeration Systems

Applied Sciences, 2019
The objective of this work is the comparison of the different cascade refrigeration systems with CO2 in the low-temperature circuit. A total of 18 different cascade refrigeration systems are examined including the CO2/CO2 cascade system.
Evangelos Bellos, Christos Tzivanidis
doaj   +1 more source

Low-GWP refrigerants in heat pumps: An experimental investigation of the influence of an internal heat exchanger

Energy Conversion and Management: X
In heat pumps, the use of refrigerants with a low global warming potential (GWP) gains importance due to increasingly strict regulations regarding their ecological impact.
Christoph Höges, Jonas Klingebiel, Valerius Venzik, Jona Brach, Philipp Roy, Kaj Neumann, Christian Vering, Dirk Müller   +7 more
doaj   +1 more source

Analysis of a simple vapor compression and ejector refrigeration systems working with eco-friendly refrigerants

Revue des Énergies Renouvelables
Transitioning to alternative refrigerants with low Global Warming Potential (GWP) in both vapor compression and ejector refrigeration systems emerges as a viable strategy to address the environmental impact associated with refrigeration technologies ...
Halla Aissani, Said Zid, Mehdi Bencharif   +2 more
doaj   +1 more source

LPG (R1270-PROPİLEN) SOĞUTUCU AKIŞKAN KULLANILAN BUHAR SIKIŞTIRMALI SOĞUTMA SİSTEMİNİN ENERJİ ANALİZİ

Mehmet Akif Ersoy Üniversitesi Uygulamalı Bilimler Dergisi, 2018
Bu çalışmada, hidrokarbon soğutucu akışkanlardan biri olan LPG (R1270-Propilen) kullanılan buhar sıkıştırmalı soğutma sisteminin enerji analizi yapılmıştır. Hesaplamalar için Coolpack programı kullanılmıştır. LPG’nin (R1270-Propilen) farklı çalışma şartları için sistem performansına olan etkileri incelenmiştir.
Bayram KILIÇ, Emre ARABACI
openaire   +3 more sources