نتایج جستجو برای: refrigeration period

تعداد نتایج: 494524  

2013
R. Reji Kumar K. Sridhar M. Narasimha

f liquid g gas ABSTRACT The experimental apparatus was build according to the national standards of India.. The performance of the refrigeration system depends upon the heat transfer capacity of the refrigerant. Normally R12, R22, R600, R600a and 134a are used as a refrigerant. This refrigerant heat transfer capacity is not so good and increase power consumption. Due to these limitation nanoflu...

2010
Yongqing Wang

This paper continues and concludes the study of the proposed high-efficiency combined desalination and refrigeration system based on the LiBr–H2O absorption cycle introduced in the paper that is Part 1 [Proposal and analysis of a high-efficiency combined desalination and refrigeration system based on the LiBr– H2O absorption cycle––Part 1: System configuration and mathematical model. Energy Con...

Journal: :Scientific American 1909

2015
Vivek Shukla

The study evaluated the shelf life of buffalo meat in refrigerated storage. The shelf life was evaluated for 9 days where all the physicochemical parameters were analysed on alternate days i.e. on the 0th, 3rd, 5th, 7th and 9th days. Buffalo meat was kept in polystyrene foam trays which were covered with PVC film and stored at refrigeration temperature. A significant change was recorded in phys...

2012
Jeffrey W. Savell

Introduction Chilling freshly harvested beef carcasses is necessary for food safety and quality purposes. Before mechanical refrigeration, meat either had to be consumed immediately after slaughter or be preserved through salting, curing, and/or smoking. With the advent of mechanical refrigeration and networks of refrigerated carriers, the production, processing, and distribution of carcasses a...

2002
Dan W. Taylor David W. Corne David L. Taylor Jack Harkness

Supermarkets suffer serious financial losses owing to problems with their refrigeration systems. Most refrigeration units have controllers which output "high-temperature" and similar alarms. We describe a system developed to predict alarm volumes from this data in advance, and compare evolved and backpropogation-trained neural networks, and evolved rulesets for this task.

Journal: :روش های عددی در مهندسی (استقلال) 0
شهرام طالبی و علی اصغر رستمی s. talebi and a.a. rostami

refrigerants that are used in refrigeration systems, cause environmental difficulties such as depletion of ozone layer and greenhouse effect. thus, we must find substitutes for such refrigerants, in this paper, the effect of refrigerant on the thermodynamics performance of refrigeration cycles are studied. to do this, a refrigerator that has designed for r12, is simulated. results show that pur...

The energy crisis in recent years has led to the use of thermodynamic cycles that work based on renewable energies. Low-temperature cycles—such as organic cycles—are suitable strategies for the application of renewable energies. The present study proposes a novel cycle through the integration of a two-stage compression refrigeration cycle with a combined Rankine power and ejector refrigerat...

Journal: :Applied sciences 2021

The growing global demand for energy and the costly taxes on electric demonstrate importance of seeking new techniques to improve efficiency in industrial facilities. Refrigeration units a large amount electricity due high power needs components system. One strategy reduce consumption these facilities is pressure condensation control. objective here was develop logical control model where physi...

Journal: :Sustainability 2021

The tremendous input of ammonium and rare earth element (REE) ions released by the enormous consumption (NH4)2SO4 in situ leaching for ion-adsorption RE mining caused serious ground surface water contamination. Anaerobic oxidation (anammox) was a sustainable technology that can reduce this nitrogen pollution. In research, situ, semi ex method inoculation included low-concentration (0.02 mg·L?1)...

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