How long would it take a 2.8kw heater to rise the temperature of a 9000litre simming pool by 6 degrees?

Answer 1

If this is a homework question, then:

Q = mc(DeltaT)

Q = 9,000kg (1000g/1kg) (4.184J/g-C) (6C)

note: I hope you're talking temperature in C.

Q = 225,936,000 Joules

A joule is a watt-second.

2.8kw = 2,800 watts

225,936,000joules (1watt-second/1joules) / 2,800 watts

= 80,691.4 seconds

= 1,344 minutes

= 22.4 hours

(excluding losses or gains from ambient)

If you're talking about degrees F, then it's 12.45 hours.

Answer 2

The 2.5 kW heater on my hot-tub takes about 1 hour to raise the temperature 5 degF when the ambient temperature is around 70 degF. The tub holds approximately 1000 liters.

Given your pool with 9 times the volume, which translates to over 4.3 times the surface area, it will take a very long time to raise the temperature by 6 degrees (F), and depending on the ambient temperature it may never happen.

.

Answer 3

This sounds like one of those crazy homework questions that teachers give you to shut you up for an hour or two!

Depends on the depth of the pool; the shape of the pool (long, narrow pools take less time to heat than perfectly square or round pools); what the pool is made of (rubber, plastic, wood surround, cement surround etc.); whether it is an 'above ground' pool or cement and tiled 'in ground pool'); the temperature outside (or inside if you're posh and have an indoor pool); what the pool is filled with (milk, water, alcohol?); the colour of the liquid (reflected light reacts differently); and whether the sides and floor are coated in algae or not (helps conserve heat).

Hmmmmm.

Answer 4

i hope you are pumping the water through the heater, i would probably say the heater isnt big enough. some spa pools have 8kw heaters in them and they are well less than 9000 litres

Answer 5

question incomplete


what is the surface area of water and the ambient temp in the pool room