Hi,
I am trying to calculate our brewery's peak refrigeration load, so that I can ensure that we have enough cooling supplied from our 3 compressors. I have 3 compressors onsite that provide a total of 121kw. I have done some rough calculations on our heat load but I am unsure if I am correct. Would some one be able to pass on/clarify some calculations for working out the following:
1. Heat generated from fermenting beer. I found a source that said every kg of extract was equal to 558kj of heat. This seems pretty easy to work out depending on the time of the ferment.
2. Cooling a fermenter from fermenting temp say 22C down to -1.5C. The problem that I have here is using q=mxcpdt does not take into account that the load varies, with the highest load being at the start of cooling.
3. Cooling of chilled water to be used in wort heat exchanger cooling.
The value that I got was 148kW which seems strange considering that the system doesn't struggle too much. If someone gets a chance can they please help me out. I'd like to go through the numbers myself if you can help me out.
Cheers
Andrew
Sydney
I am trying to calculate our brewery's peak refrigeration load, so that I can ensure that we have enough cooling supplied from our 3 compressors. I have 3 compressors onsite that provide a total of 121kw. I have done some rough calculations on our heat load but I am unsure if I am correct. Would some one be able to pass on/clarify some calculations for working out the following:
1. Heat generated from fermenting beer. I found a source that said every kg of extract was equal to 558kj of heat. This seems pretty easy to work out depending on the time of the ferment.
2. Cooling a fermenter from fermenting temp say 22C down to -1.5C. The problem that I have here is using q=mxcpdt does not take into account that the load varies, with the highest load being at the start of cooling.
3. Cooling of chilled water to be used in wort heat exchanger cooling.
The value that I got was 148kW which seems strange considering that the system doesn't struggle too much. If someone gets a chance can they please help me out. I'd like to go through the numbers myself if you can help me out.
Cheers
Andrew
Sydney
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