boeing 737 systems Air conditioningDescrição completa
boeing 737 systems Air conditioning
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We know that the present air conditioning system produces cooling effect by refrigerants like Freon, Ammonia. Using this refrigerants can get maximum output but one of the major disadvantages is harmful gas emission and global warming. This problem c
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BLEED CAUTION, do not use HP GND air with APU bleed AVIONICS VENTILATION CONFIGURATIONS: CLOSED, on GND (skin32°-35°C) then EXTRACT VLV partially opens OPEN, on GND (skin>9°-12°C) SMO…Full description
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Trane Air Conditioning ManualDescripción completa
BLEED CAUTION, do not use HP GND air with APU bleed AVIONICS VENTILATION CONFIGURATIONS: CLOSED, on GND (skin32°-35°C) then EXTRACT VLV partially opens OPEN, on GND (skin>9°-12°C) SMO…Full description
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The demand of air conditioning is increasing due to the effect of climate change and global warming. If we still rely on the conventional electric air conditioning it will be harmful in future because electricity is generated from fossil fuels, the g
Design Of Air Conditioning System For Auditorium
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The dual duct systems can provide both cooling and heating simultaneously. These systems can be further classified into: 1. Dual duct, constant constant volume systems 2. Dual duct variable volume systems
36.4.1. Single duct, constant volume, single zone systems: Figure 36.2 shows the classic, single duct, single zone, constant volume systems. As shown in the figure, outdoor air (OD air) for ventilation and recirculated air (RC air) are mixed in the required proportions using the dampers and the mixed air is made to flow through a cooling and dehumidifying coil, a heating coil and a humidifier using a an insulated ducting and a supply fan. As the air flows through these coils the temperature and moisture content of the air are brought to the required values. Then this air is supplied to the conditioned space, where it meets the building cooling or heating requirements. The return air leaves the conditioned space, a part of it is recirculated and the remaining part is vented to the atmosphere. A thermostat senses the temperature of air in the conditioned space and controls the amount of cooling or heating provided in the coils so that the supply air temperature can be controlled as per requirement. A humidistat measures the humidity ratio in the conditioned space and controls the amount of water vapour added in the humidifier and hence the supply air humidity ratio as per requirement. Humidifier Cooling coil
Heating coil
Supply air duct with fan
OD air
H T Dampers
Conditioned space
RC air
Exhaust Return air duct with fan
Fig.36.2 . A constant volume, single zone system This system is called as a single duct system as there is only one supply duct, duct , through which either hot air or cold air flows, but not both simultaneously. It is called as a constant volume system as the volumetric flow rate of supply air is always maintained constant. constant. It is a single zone system as the control is based on
