Checking milk pre-cooler efficiency

2012-10-04 06:38
Sales manager

In order to test a pre cooler efficiency, the easiest method is to check it at first milking (when milk cooling tank is empty).

For this first milking you will have to start the milk cooling tank only once the first milking is finished. When you start the tank, you can then read the milk temperature in the tank (provided that your temperature sensor is accurate, which is not as usual as we would like it to be !).

As you know the temperature of the water you are using to cool the milk, you can then calculate the temperature difference between output milk temperature and input water temperature (delta temperature).

The lowest the number is, the better is the energy efficiency.

With a water temperature of 12°C, if number is higher than 6°C this means that efficiency of your installation should be improved.

Up to these days, not many installation are sold with an efficiency commitment by the seller. CHARRIAU does !

The second part of the analysis will be to calculate the quantity of water used to cool the quantity of milk ...
If you are using a ratio higher than 1.5, it then demonstrates inefficiencies.


Dernière modification par charriau (2013-03-13 11:46)

2012-10-04 06:44
Sales manager

If you are using an efficient milk pre-cooler, there are numerous advantages by starting the milk cooling tank only when milking is finished :

1°) this allows you to verify your milk pre-cooler is operating as designed (when first milking).

2°) milk cooling tank evaporator is completely covered with milk before it starts working. So way less milk freezing and lipolysis risks.

3°) reduce instantaneous electricity requirements on the farm as milking system is off when mik cooling tank starts working.

Dernière modification par charriau (2013-03-27 10:45)

2012-11-19 17:34
Sales manager

Milkcooling and Electricity consumption

With rising cost of electricity, the cheapest energy is the energy you don't use in the first place.

Reaching the lowest degrees requires more electricity.


Here is another way to present it. It takes less time (electricity) to cool the same quantity fof milk from 25°C to 20°C than from 10°C to 5°C.

Any milk precooler cooler can cool milk. But down to which temperature, that is the real question !

This survey shows that not all milk pre-cooler are equal .... when it comes to efficiency.

Dernière modification par charriau (2013-03-27 10:43)