Question

For a solar system located in Colorado, how many flat-panel solar collectors with dimensions of 1 m x 1.5 m and an efficiency of 58% would be required to heat up 80gallons of water from 65°F to 120°F during the month of January? NUMBER OF PANELS

Answer 1

NOTE: we are taking such units with which we are familiar with , and commonly used.

1)specific heat capacity of water = 4.2 KJ/Kg C

2) 65 °F = 18.33 C and 120° F =48.89 °C

we will require 3 solar panels.

We were unable to transcribe this image

on Average the solar inadiance in Colorado in the mouth of January I is approximated to be = 18000 kJ/m2 .(per day of the month.) : No. of & anels required which every day during the month of January delivers warm water from (65 F to 120°F). Area = Heat required Solar Irradiance 67008.60 KT 18ooo KJ/m2 Area = 3.72 m2 - no. of panels = 3.72 2.48 1:5X1 so we will require 3 solarpanas with an area of ( mx 1. 5 m ?