Sorry it has been a while since the last post. I have done quite a bit of calculations trying to get the power requirements and different scenarios in sync with each other. As you all are aware we have a power and money problem...as in we don't have very much to work with. Some new design ideas include:
- a heat exchanger used to cool the milk down to a certain temperature using nothing more than a radiator and a human powered fan. By human powered I mean bicycle pedals hooked to a small generator capable of making roughly 150 watts. If the farmer is willing and able to use the bike for a small amount of time to run the fan, it would be quite helpful in cooling the milk and reducing the load on refrigerator. The bicycle setup would also be used in an emergency to charge the battery. The picture below shows a common plate heat exchanger. These heat exchangers are expensive on my first look and therefore we may think about using a cheaper, albeit less effective, heat exchanger using a fan and radiator setup or maybe having a separate small insulated container that contains water/glycol mix with the compressor and running the milk through the chilled mixture via stainless tubes/copper tubes.
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