H4. AC Unit Performance.pdf - H4 AC Unit Performance 1 Object To study the psychometric Processes of the air To estimate the average heat transfer to

H4. AC Unit Performance.pdf - H4 AC Unit Performance 1...

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3/6/2019 1 H4. AC Unit Performance 1. Object . To study the psychometric Processes of the air . To estimate the average heat transfer to the air.
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3/6/2019 2 2. Apparatus The apparatus consist of the following part as shown in Fig (1). . Centrifugal air fan. · Electric heaters. . Humidifier · Electrical control panel. . Thermometers . Air duct. . Grille. . Digital Flow meter.
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3/6/2019 3 EXP1: Heating & Humidification 1. Switch on the Fan and regulate the controller to have a high flow rate in the duct. 2. Record the manometer reading. Using the calibration curve to find out the air flow rate. You have two calibration curves; each one is good for certain air conditions. 3. Record the inlet condition of the air at the inlet to the fan. (T wb , and T db ) inlet 4. Switch on the air heaters. This is to heat up (sensible heating) the air stream. 5. Record the air conditions after heater (T wb , & T db ) x 6. Calculate the sensible energy added to the air. Q o s = m a o C p (T x –T 1 ) or Q o s = m a o (h x – h 1 ) x 1. Switch on the heater of the Boiler (starting the humidification process ) 2. Once reach the steady state, record conditions at inlet , after the heater , after the humidifier , and the air flow rate .
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  • Winter '16
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