ammonia refrigeration system Articles

Optimisation of thermal systems is generally based on thermodynamic analysis. However, the systems so optimised are often not viable due to economic constraints. In this paper, an attempt is made to minimise the overall operation and amortisation cost of an aqua-ammonia vapour absorption refrigeration system for air-conditioning application using the theory of exergetic cost. This simplified ...

Nov. 14, 2004

By Inderscience Publishers

Exergoeconomic analysis of an industrial brine chilling unit using a large capacity aqua ammonia Vapour Absorption Refrigeration (VAR) system is carried out. The analysis is based on Tsatsaronis's Thermoeconomic Evaluation and Optimisation (TEO) Method which is one of the many methods that was developed since the pioneering work of Tribus and Evans. The economic cost of all the flows and product ...

Apr. 20, 2011

By Inderscience Publishers

An energetic and exergetic study on a diffusion absorption refrigerator (DAR) is presented in this paper. It uses ammonia as the refrigerant, water as the absorbent and hydrogen as the auxiliary gas. A computer model has been developed to calculate the thermodynamic properties of all state points, heat flow rates, exergy losses and COP degradation in each component of the system. The system ...

Oct. 19, 2008

By Inderscience Publishers

Operator training has become one of the most prevalent areas of deficiency in Process Safety Management (PSM) Programs for refrigeration systems today. High turnover in the refrigeration industry coupled with high complexity system designs and an increasing void of technicians trained in foundational trades are the perfect storm for compliance challenges among operators of large refrigeration ...

Nov. 15, 2017

By Evapco Inc.

Performance comparisons of two vapour compression refrigeration cycles (CYC1 and CYC2) based on the exergetic analysis with three natural refrigerants: ammonia, propane and isobutane are presented using vortex tube as an expansion device. Effects of various operating and design parameters on the performance improvement are presented. Results are shown that the exergetic efficiency improvement ...

Dec. 8, 2013

By Inderscience Publishers

The LPT-A Vent Line Ammonia Transmitter (P/N: LPT-A-VLT-NH3-S) is designed for continuous monitoring of ammonia levels in the vent lines of refrigeration systems caused by equipment failure or system over pressurization. Slow leaks of refrigerant can be costly over time and a dangerous situation could present itself if a high pressure release were to occur. The VLT provides continuous, ...

Feb. 9, 2016

By Critical Environment Technologies Canada Inc. (CETCI)

Ammonia (NH3) has been hitting the news for all the wrong reasons, after several gas leaks have been reported at workplaces. ...

Sep. 1, 2017

By Analox Sensor Technology

The aim of the present paper is to carry out a detailed exergy analysis of a two-stage vapour compression cycle by calculating its components exergetic losses. The exergy equations have been developed using refrigerant thermodynamic properties computed by means of a simple model of local equations of states. The results of the exergy analysis of a two-stage refrigeration system operating between ...

Mar. 8, 2005

By Inderscience Publishers

A few years ago Union Camp turned a corner. Management decided that advance planning would take the place of reacting after the fact to an emergency or regulatory agency demands. At Union Camp’s Dover, OH. facility, byproducts of the paper industry are converted into usable specialty chemicals for cosmetics, adhesives and other industries. Crystallization is a process used intensively ...

Feb. 15, 2016

By CR Clean Air Group, LLC

In March of 2016, an ammonia gas leak at a seafood processing plant in Boston left one worker dead. The fumes at the plant were so powerful that firefighters could not promptly enter the scene to mitigate the gas leak and try to save the staff member until much later. Reports show that 5,300 pounds of ammonia gas leaked out of the plant. If you work with ammonia at your facility, learn ...

Apr. 19, 2016

By PureAire Monitoring Systems, Inc

Several years ago, the United States and other countries passed federal laws that mandate commercial facilities to phase out usage of R22 refrigerant and convert to a more environmentally friendly alternative (i.e. SNAP refrigerant alternatives).Many organizations are working on conversion efforts for the 2015 phase out deadline. Other organizations are putting into practice various measures to ...

Mar. 4, 2009

By Verisae

A few years ago Union Camp turned a corner. Management decided that advance planning would take the place of reacting after the fact to an emergency or regulatory agency demands. At Union Camp’s Dover, OH. facility, byproducts of the paper industry are converted into usable specialty chemicals for cosmetics, adhesives and other industries. Crystallization is a process used intensively with ...

Feb. 15, 2016

By CR Clean Air Group, LLC

The WWTP itself is located in the East Midlands, and treats dairy waste from a large processing plant, treating c1,500m3 of effluent per day. On 30th July the ammonia (NH3) levels in the permeate from the MBR at the plant began to increase. The effluent plant discharges to a river and as such, the consent limit is stipulated by the Environment Agency at 4mg/l. Within three days, the ammonia ...

May 28, 2014

By Cleveland Biotech Ltd.

The WWTP itself is located in the East Midlands, and treats dairy waste from a large processing plant, treating c1,500m3 of effluent per day. On 30th July the ammonia (NH3) levels in the permeate from the MBR at the plant began to increase. The effluent plant discharges to a river and as such, the consent limit is stipulated by the Environment Agency at 4mg/l. Within three days, the ammonia ...

Feb. 6, 2014

By Cleveland Biotech Ltd.

Rumiano Cheese is one of the oldest dairy processing operations in the western U.S. Notably ahead of its time, they were the first dairy operation with an ammonia refrigeration system on the West coast. Today, that pioneer spirit still thrives as the firm tackles growing wastewater issues.The dairy operation was contributing more than 1/3 of the local utility district‘s BOD load. And as Crescent ...

May 9, 2007

By World Water Works, Inc.

Abstract Fin coil evaporators with enhanced internal tube surfaces allow for optimum performance with a minimal overfeed rate. Reducing the overfeed rate requiresless pumping power and smaller line sizes to the evaporator. Additionally, less compressor power is required for the same refrigeration capacity because the wet suction line pressure drop is reduced. Lower compressor power results ...

May 22, 2017

By Evapco Inc.

The California Energy Commission released the final version of Title 24-2013 last Fall, and early this year changed the effective date of the standard from January 1, 2014 to July 1, 2014. Equipment selected for the State of California will need to meet the new Title 24, Part 6 requirements beginning July 1, 2014. Relevant requirements include: Increased efficiency requirements for Open, Axial ...

May 23, 2017

By Evapco Inc.

Problem: The Monomeros Colombo Venezolanos plant in Barranquilla, Colombia, jointly operated by the South American countries of Colombia and Venezuela, produces caprolactam for the textile industry and various chemical fertilizers for agricultural use. Recently agricultural plant capabilities were increased with the addition of process units to improve the production and quality ...

Feb. 15, 2016

By CR Clean Air Group, LLC

Problem: The Monomeros Colombo Venezolanos plant in Barranquilla, Colombia, jointly operated by the South American countries of Colombia and Venezuela, produces caprolactam for the textile industry and various chemical fertilizers for agricultural use. Recently agricultural plant capabilities were increased with the addition of process units to improve the production and quality ...

Feb. 15, 2016

By CR Clean Air Group, LLC

A contract sterilization service uses a single-stage scrubber to convert this hazardous gas to inert ethylene glycol: ETO Sterilization Inc. provides contract sterilization services for hundreds of northern New Jersey customers, concentrating on spices and herbs, cosmetic ingredients and medical supplies. Two of the largest ethylene oxide sterilization vessels in the world are in operation ...

Feb. 15, 2016

By CR Clean Air Group, LLC