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38 Results
Publication - A New Modeling Approach for the Study of Refrigeration Finned Coils with CO 2
CETC Number 2010-053 / 2010-08-17 Abstract Heat exchangers are major components in refrigeration systems where they are used as evaporators or condensers. Better understanding their thermal and hydrodynamic behaviour is therefore important, in order to improve their design and maximize their performance. In this paper, a new model simultaneously accounting for the thermal and hydrodynamic behaviour of fin and tube heat exchangers working under conditions of no condensation of air ...
CETC Number 2010-053 / 2010-08-17 Abstract Heat exchangers are major components in refrigeration systems where they are used as evaporators or condensers. Better understanding their thermal and hydrodynamic behaviour is therefore important, in order to improve their design and maximize their performance. In this paper, a new model simultaneously accounting for the thermal and hydrodynamic behaviour of fin and tube heat exchangers working under conditions of no condensation of air ...
Publication - A New Modeling Procedure for Circuit Design and Performance Prediction of Evaporator Coils Using CO 2 as Refrigerant
CETC Number 2010-091 / 2010-08-17 Abstract The replacement of environmentally damaging synthetic refrigerants due to their ODP or GWI potential by natural refrigerants such as CO 2 is now up in the research agenda. Moreover, current energy supply concerns make of efficiency another first priority issue to dictate new stringent design criteria for industrial and commercial equipment. Heat exchangers are the most important components in refrigeration systems where they are used as ...
CETC Number 2010-091 / 2010-08-17 Abstract The replacement of environmentally damaging synthetic refrigerants due to their ODP or GWI potential by natural refrigerants such as CO 2 is now up in the research agenda. Moreover, current energy supply concerns make of efficiency another first priority issue to dictate new stringent design criteria for industrial and commercial equipment. Heat exchangers are the most important components in refrigeration systems where they are used as ...
Publication - CO 2 as a Refrigerant in a Sobeys Supermarket
CETC Number 2010-093 / 2010-05-27 Abstract Out of concern for the environment, the Sobeys Québec inc. Corporation has built a supermarket that is innovative in terms of environmentally friendly refrigeration. The new IGA supermarket in St‑Félix‑de‑Valois is equipped with a refrigeration system that minimizes the risk of synthetic refrigerant leaks, which constitue an important source of greenhouse gas (GHG) emissions from supermarkets. Opened in May 2009, the new supermarket is among ...
CETC Number 2010-093 / 2010-05-27 Abstract Out of concern for the environment, the Sobeys Québec inc. Corporation has built a supermarket that is innovative in terms of environmentally friendly refrigeration. The new IGA supermarket in St‑Félix‑de‑Valois is equipped with a refrigeration system that minimizes the risk of synthetic refrigerant leaks, which constitue an important source of greenhouse gas (GHG) emissions from supermarkets. Opened in May 2009, the new supermarket is among ...
Publication - CO 2 and Secondary Fluids Refrigeration
CETC Number 2010-050 / 2010-04-13 Abstract This conference was presented to the "Corporation des entreprises de traitement de l’air et du froid (CETAF)" on March 23 rd , 2010 in Laval and March 30 th , 2010 in Quebec. For 20 years, the refrigeration sector has been strongly disturbed by the environmental consequences of synthetic refrigerants. Since January 1, 2010, it is prohibited to manufacture or to import new refrigeration equipment using HCFC such as the very well known R22. ...
CETC Number 2010-050 / 2010-04-13 Abstract This conference was presented to the "Corporation des entreprises de traitement de l’air et du froid (CETAF)" on March 23 rd , 2010 in Laval and March 30 th , 2010 in Quebec. For 20 years, the refrigeration sector has been strongly disturbed by the environmental consequences of synthetic refrigerants. Since January 1, 2010, it is prohibited to manufacture or to import new refrigeration equipment using HCFC such as the very well known R22. ...
Publication - Using CO 2 for Cold Distribution at a Loblaw Supermarket
CETC Number 2009-211 / 2010-01-07 Abstract For many years, Loblaw Companies Limited (Loblaw) has relied upon innovative refrigeration technologies. Building on past successes, in 2008, Loblaw opened its first environmental flagship store in Ontario - the new Superstore in Scarborough. This very large supermarket with multiple functions is the first in Canada to use carbon dioxide (CO 2 ) as a heat transfer fluid in a secondary loop that links the low-temperature refrigeration system to ...
CETC Number 2009-211 / 2010-01-07 Abstract For many years, Loblaw Companies Limited (Loblaw) has relied upon innovative refrigeration technologies. Building on past successes, in 2008, Loblaw opened its first environmental flagship store in Ontario - the new Superstore in Scarborough. This very large supermarket with multiple functions is the first in Canada to use carbon dioxide (CO 2 ) as a heat transfer fluid in a secondary loop that links the low-temperature refrigeration system to ...
Publication - Refrigeration: Technologies Under Development
CETC Number 2009-034 / 2009-02-02 Abstract This presentation describes technologies under development to eliminate synthetic refrigerants, namely secondary fluids, carbon dioxide refrigerant and ejectors. For each technology, operation, benefits, disadvantages, types and costs are discussed. To learn more about CanmetENERGY's activities related to refrigeration, visit the Refrigeration and Heat Pumps sections of the website. Download Full Document (, 835,3 ...
CETC Number 2009-034 / 2009-02-02 Abstract This presentation describes technologies under development to eliminate synthetic refrigerants, namely secondary fluids, carbon dioxide refrigerant and ejectors. For each technology, operation, benefits, disadvantages, types and costs are discussed. To learn more about CanmetENERGY's activities related to refrigeration, visit the Refrigeration and Heat Pumps sections of the website. Download Full Document (, 835,3 ...
Publication - CO 2 in Refrigeration: a Valuable Technology
CETC Number 2008-072 / 2008-04-11 Abstract Since a few years, carbon dioxide (CO 2 ) makes a come-back in refrigeration. This presentation presents the current status of technologies and applications using CO 2 as refrigerant fluid or coolant. The following subjects are discussed: short history of CO 2 in refrigeration, thermodynamic properties, safety measures, industrial, commercial and residential applications, and a few products available on the market. To learn more about ...
CETC Number 2008-072 / 2008-04-11 Abstract Since a few years, carbon dioxide (CO 2 ) makes a come-back in refrigeration. This presentation presents the current status of technologies and applications using CO 2 as refrigerant fluid or coolant. The following subjects are discussed: short history of CO 2 in refrigeration, thermodynamic properties, safety measures, industrial, commercial and residential applications, and a few products available on the market. To learn more about ...
Publication - Effects of Multi-Pass Brine System on the Ice Temperature of Skating Rinks
CETC Number 2007-221 / 2008-01-01 Abstract Two approaches were developed to study the influence of the multi-pass brine system on the ice surface temperature: the first one is analytical based on a simple thermal circuit employing 4 nodes with isothermal boundary condition at a specified depth within the soil underneath the slab and the second one is a numerical three-dimensional model which employs the control volume method to solve partial differential equations that describe the ...
CETC Number 2007-221 / 2008-01-01 Abstract Two approaches were developed to study the influence of the multi-pass brine system on the ice surface temperature: the first one is analytical based on a simple thermal circuit employing 4 nodes with isothermal boundary condition at a specified depth within the soil underneath the slab and the second one is a numerical three-dimensional model which employs the control volume method to solve partial differential equations that describe the ...
Publication - Transient Energy Flux Analysis in an Indoor Ice Rink Using a CFD Approach
CETC Number 2007-033 / 2008-01-01 Abstract An innovative method for energy flux calculations in an indoor ice rink has been developed and tested by comparing its predictions with measured values in a Montreal (Canada) municipal ice rink and a reduced-scale test bench. Based on a CFD simulation of the velocity, temperature and humidity fields it was used to predict the daily heat flux profiles into the ice by convection, radiation, condensation and resurfacing operations for a ...
CETC Number 2007-033 / 2008-01-01 Abstract An innovative method for energy flux calculations in an indoor ice rink has been developed and tested by comparing its predictions with measured values in a Montreal (Canada) municipal ice rink and a reduced-scale test bench. Based on a CFD simulation of the velocity, temperature and humidity fields it was used to predict the daily heat flux profiles into the ice by convection, radiation, condensation and resurfacing operations for a ...
Publication - Project Profil Refrigeration Technological Innovation - Dow Centennial Centre (Alberta)
CETC Number 2006-144 / 2006-07-20 Abstract Potential for total heat recovery from refrigeration system Extensive integration of the refrigeration system with the heating, ventilation and air conditioning system Ice battery for short term storage of heat and cold Variable condensing temperature and pressure (Floating head pressure) To learn more about CanmetENERGY's activities related to refrigeration, visit the Refrigeration and Heat Pumps sections of ...
CETC Number 2006-144 / 2006-07-20 Abstract Potential for total heat recovery from refrigeration system Extensive integration of the refrigeration system with the heating, ventilation and air conditioning system Ice battery for short term storage of heat and cold Variable condensing temperature and pressure (Floating head pressure) To learn more about CanmetENERGY's activities related to refrigeration, visit the Refrigeration and Heat Pumps sections of ...