WOULD A 0.5 HP COOLING WATER PUMP BE SUFFICIENT?
We use a pressure gauge to verify the water circulation pressure and flow rate, allowing us to determine the necessary pump rating.
The calculation table can be used to find the drop in pressure drops through the piping, according to the necessary flow rate.
TO ENSURE THAT THE WATER WILL NOT FREEZE, SHOULD I ADD A GOOD DEAL OF ANTI-FREEZE (ETHYLENE GLYCOL)?
The percentage of ethylene glycol (% by weight) must not be higher than the one needed to reach the minimum required temperature. Therefore, if you wish to achieve a water temperature of -10°C, you should considerer that it may get as low as -20°C at the coldest point of the refrigerator. It is crucial to establish the percentage of ethylene glycol required for the minimum temperature (as a precaution, you should consider 10°C less) that the environment and the piping must withstand in the coldest season, as sometimes the piping is laid along outdoor walls. In order to find the required percentage, you should use the specific table, all the while considering that a larger percentage of ethylene glycol corresponds to a:
- decrease in the pump flow rate (l/min);
- decrease in the refrigerating capacity (Watt).
