A refrigerator in a hospital removes 40 kW of heat from a sp

In summary, a hospital refrigerator removes heat through refrigeration by compressing and expanding a refrigerant gas. This is important to maintain a safe and consistent temperature for storing medications and samples. On average, a hospital refrigerator can remove 40 kW of heat and the excess heat is released into the surrounding environment. The amount of heat removed is measured and controlled by a thermostat.
  • #1
hc23881
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Thread moved from technical Engineering forums, so no HH Template is shown
A refrigerator in a hospital removes 40 kW of heat from a space used for blood storage. The coefficient of performance of the refrigerator is 8. What is the work (kJ) required to operate the refrigerator continuously for one day?

What I attempted to do:

W in = Qin/COP therefore, Win = 40kW(24hr)/8 = 120 kJ

but that is wrong..
 
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  • #2
You have a unit error:

(kW)*(Hr) ≠ kJ

A conversion factor on the LHS is required..
 
  • #3
billy_joule said:
You have a unit error:

(kW)*(Hr) ≠ kJ

A conversion factor on the LHS is required..
ahh i got it! thanks!
 

1. How does a refrigerator in a hospital remove heat?

The refrigerator in a hospital removes heat through a process called refrigeration, which involves compressing and expanding a refrigerant gas to absorb and release heat.

2. Why is it important for a hospital refrigerator to remove heat?

A hospital refrigerator needs to remove heat to keep the temperature inside at a safe and consistent level for storing temperature-sensitive medications and samples.

3. How much heat does a hospital refrigerator remove?

A typical hospital refrigerator can remove around 40 kW (kilowatts) of heat, which is equivalent to 40,000 watts or 136,480 BTUs (British Thermal Units) per hour.

4. What happens to the heat that is removed from the hospital refrigerator?

The heat that is removed from the hospital refrigerator is released into the surrounding environment through a series of coils and fans located on the back or bottom of the refrigerator.

5. How is the amount of heat removed by a hospital refrigerator measured and controlled?

The amount of heat removed by a hospital refrigerator is measured and controlled by a thermostat, which senses the temperature inside the refrigerator and adjusts the cooling system accordingly.

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