A domestic solar thermal panel receives 2.4 × 106 J of solar energy from the Sun during a clear afternoon, but only 8.4 × 105 J of this energy is successfully transferred to heat the water in a domestic hot water cylinder.
Calculate the efficiency of the solar thermal panel.
Use the equation:
efficiency=useful energy transferredtotal energy supplied \text{efficiency} = \frac{\text{useful energy transferred}}{\text{total energy supplied}} efficiency=total energy supplieduseful energy transferred