Canadian Buildings consume nearly the third of the total energy of the country, so they are responsible for issuing a third of greenhouse gas emissions. Given that two thirds of this energy is dedicated to ventilation systems, the needs to model a ventilation system that uses less energy and then reduces greenhouse gas emissions prove compelling.
The main objective of this thesis is to model a dedicated outdoor air system (DOAS) and compare its efficiency with other ventilation and air conditioning systems commonly used in Quebec. DOAS systems are becoming increasingly popular in the United States because of their energy efficiency while maintaining the indoor air quality. Otherwise installing such systems in Quebec is not widespread.
To achieve our objective, we applied the method for calculating outdoor air flows for each system depending on the load areas, and then we applied the method to calculate the absolute humidity of the air supply to find the temperature of the air supply batteries after air treatment.
Next, we determined the mode of operation of air handling equipment for each system depending on the characteristics of the outside air. The model thus developed is used to calculate the powers of such equipment and the energy consumed by the DOAS and other systems used for comparison purposes.
The result obtained in this paper demonstrates that the DOAS system is among the most energy-efficient systems used in the comparison. Use of the enthalpy wheel and sensible wheel allowed us to eliminate the use of systems of heating and humidification of air, thus reducing the costs of air handling units.
| Date | 25 May 2011 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Stanislaw Kajl (Supervisor) |
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Aouad, N. (Author),
Kajl (Supervisor),
25 May 2011Student thesis: Master's thesis › Master in Engineering: Mechanical Engineering