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A solar heating system has a 25% conversion efficiency

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Question:

Cramster Expert

dhara

(Cramster SME)

Cramster In-House Subject Matter Expert

Date Posted: 7/25/2008 3:57:21 AM Status: Live

Asker's Rating: Helpful

Response:

The intensity of radiation is

I = (P/A),where P is power and A is the collector area.

or P = I * A

Here,I = 1000 W/m^2 and A = 4.0m^2.

The work done is

W = P * t,where t = 1.0hr = 60 * 60 = 3600s

The work done is also given by

W = m * s * Δt

or Δt = [(W)/(m * s)]

Here,m = 30kg and s = 4190J/kg.K.Substituting the values of W,m and s,we get the value of increase in temperature.

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