Question

Create two sets of plots (one set for Evansville and one set for Phoenix, AZ) that show how the following factors impact the exit temperature for the solar collector. The initial temperature of the water is 22°C. Assume a constant heat removal factor of 0.95, and a glass cover with a transmissivity of 0.97. Unless otherwise stated, use values from Part 1 for remaining variables.

Vary absorber plate surface properties:

• Black nickel oxide plated metal ? = 0.92

• Black chrome plated metal ? = 0.87

• Galvanized sheet metal ? = 0.65

PLOTS

1. Vary collector plate area from 0.1 to 10 m2 .

2. Vary mass flow rate from 0.01 to 0.1 gpm. Use a collector plate area of 4 m2 .

3. Vary overall heat transfer coefficient from 0 (no losses) to 20 W/m2 -K.

4. Vary the specific heat of the working fluid for values between bromine and water properties. Use a collector plate area of 4 m2 and a mass flow rate of 0.73 kg/s.

Answer 1

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