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Publication - IEA Heat Pump Programme
CETC Number 2011-069 / 2011-09-23 Abstract This document has been presented during the 10 th International Heat Pump Conference, held on June 27-August 31, 2011. The IEA Heat Pump Programme provides information and establishes strategic partnerships to support the development and the adoption of heat pumping technologies including heat pumps, refrigeration and air conditioning systems. Heat pumping technologies are very attractive as they can provide significant reductions in ...
Publication - Simulated Performance of a Solar Assisted Heat Pump Using Ice Slurry as a Latent Storage Material
CETC Number 2011-008 / 2011-09-16 Abstract A new solar assisted heat pump incorporating latent heat storage is proposed. Solar collectors are operated in series with a non-agitated ice storage tank, while a heat pump is used to transfer thermal energy from the ice tank to a warm water storage tank serving heating and domestic hot water demands. System performance is investigated in a high performance home in Montreal using the TRNSYS energy simulation program. Results show a ...
Publication - CFD Analysis of an Ejector for Cooling Applications
CETC Number 2011-045 / 2011-08-29 Abstract Vapour-jet ejectors have been used in cooling/refrigeration applications since the early 1900s. Recent efforts to reduce energy consumption by harnessing energy from low grade industrial waste heat or renewable energy sources have resulted in a renewed interest in this technology. This paper presents the results of computational fluid dynamics (CFD) simulations of a vapour-jet ejector operating with R245fa as the working fluid. The impact of ...
Publication - Assessment of a Sorption Chiller Driven by a Cogeneration Unit in a Residential Building
CETC Number 2011-041 / 2011-06-21 Abstract This paper describes the TRNSYS model developed to investigate the techno-economic feasibility of a small scale trigeneration system for residential or small business applications. A 210m 2 single family home located in Ontario and equipped with a commercially available 6 kWe micro cogeneration system where cooling is provided by a chiller relying on either absorption or adsorption principles was simulated. The results anticipated reductions ...
Publication - Ice Slurry Applications and Technical Challenges
CETC Number 2011-087 / 2011-06-01 This presentation has been made at the 79 th ACFAS Annual Congress, on May 11 th , 2011. Abstract Ice slurries are fluids that contain ice crystals of less than 1 mm diameter. Pure water renders ice slurry with a constant temperature of 0°C, no matter its ice fraction. Addition of alcohol, glycol or salt in the water makes it possible to obtain ice slurry at temperatures lower than 0°C. The temperature of ice slurry will then depend on the substance ...
Publication - Trigeneration in Canadian Residential Buildings
CETC Number 2011-031 / 2011-05-31 This presentation has been made at the 79 th ACFAS Annual Congress, on May 11 th , 2011. Abstract Trigeneration is the simultaneous generation of electricity, heat and cold. This concept includes local power generation through a cogeneration unit and the use of waste heat for heating and cooling. The benefits of trigeneration are reductions in energy consumption, electricity demand, GHG emissions and operating costs. A simulation model was ...
Publication - The Potential of Ground-Source Heat Pumps for Canada
CETC Number 2010-047 / 2010-05-12 Abstract This publication, published in the Canadian Society for Mechanical Engineering (CSME) Bulletin, presents a brief summary of the potential of Ground-Source Heat Pumps (GSHP) to meet the challenges of Canada's energy efficiency goals. These goals affecting the supply, quality and reliability of conventional forms of energy, can have a significant impact on the quality of life in Canada. The GSHP can reduce significant energy consumption and ...
Publication - Ejectors
CETC Number 2009-185 / 2009-11-02 Abstract Ejectors are driven by waste heat or heat from renewable sources, and directly activated by a thermal source to produce heating, cooling or refrigeration. The potential impacts of ejectors are huge as they may be utilized in a variety of applications. They can be directly integrated in a heat pump-cooling-refrigeration system as an internal component to increase the system efficiency. They can also be used in hybrid systems (cascade, ...
Publication - An Experimental Investigation of an Ejector Operating with R245FA
CETC Number 2009-044 / 2009-09-09 Abstract Supersonic ejectors have been used in cooling/refrigeration applications since the early 1900s. Interest in supersonic ejectors has been rekindled by recent efforts to reduce energy consumption; ejector refrigeration systems can be powered by solar energy or by waste heat generated by another process. This paper describes an experimental test bench assembled and operated at CanmetENERGY in Varennes. The results from this test bench provide a ...
Publication - CFD Simulations of a Supersonic Ejector for Use in Refrigeration Applications
CETC Number 2008-068 / 2008-07-17 Abstract Supersonic ejectors have been used in cooling/refrigeration applications since the early 1900s. Interest in supersonic ejectors has been rekindled by recent efforts to reduce energy consumption; ejector refrigeration systems can be powered by solar energy or by waste heat generated by another process. This paper presents the results of computational fluid dynamics (CFD) simulations of a supersonic ejector for use in a refrigeration system. The ...