# Calculate the power required (kW) for an immersion heater element when it is required to raise the..

Calculate the power required (kW) for an immersion heater element when it is required to raise the temperature of 73 litres of water from 10C to 60C in 2.5 hours assuming 20% heat losses. (5 marks) d) A general office space of dimensions16 m x 10 m x 4 m (floor to false ceiling) has a white ceiling and light-coloured walls with reflection factors of 70 & 50 per cent respectively. The working place of the office is approximately 1 m above the floor level. It is proposed to use 70 W fluorescent light fittings with a rated output of 5,000 lm. If the illumination level is 400 lx, determine

Calculate the power required (kW) for an immersion heater element when it is required to raise the temperature of 73 litres of water from 10C to 60C in 2.5 hours assuming 20% heat losses. (5 marks) d) A general office space of dimensions16 m x 10 m x 4 m (floor to false ceiling) has a white ceiling and light-coloured walls with reflection factors of 70 & 50 per cent respectively. The working place of the office is approximately 1 m above the floor level. It is proposed to use 70 W fluorescent light fittings with a rated output of 5,000 lm. If the illumination level is 400 lx, determine the number of fittings required.

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