Heating up water- energy required

[vikmak]

Is the below calc right?

Input electrical power for heating- 4KW
Heating time= 20 hrs = 72,000 sec
Input energy available= = 288,000,000 J

Qty of water to be heated- 7,500Kg
Specific heat of water- 4,200 joules/Kg/deg C

Delta T in Celsius that can be achieved with the said input energy is 9.14 ?

 

[grzz]

yes!

 

[vikmak]

yes!

Thanks!

 

[vikmak]

Now the bigger question. How do you design a waste heat recovery system to heat water from the heat out of air cooled condenser of a 4 ton air conditioning unit. This 4 ton air conditioning unit runs for 24 hrs. Hot water is required for bathing purposes in a hostel.

 

[vikmak]

can anybody tell me where to look in for information on design related to heat recovery system?