Re: Calculating Your Machines Energy Consumption...
Rather than messing about calculating it - why not just get one of those wattmeter thingies (eg this from jaycar: http://www.jaycar.com.au/productView.asp?ID=MS6115) and run it for a while and see? From memory, my expobar minore costs about $0.10 for the first 1/2 hour (warming up) and then runs at about $0.03 per hour when not making shots (assuming about $0.20/kWh). Unless you are making a _lot_ of coffee and steam I suspect most of the energy used will be making up for the heat lost to the surroundings (depending on things like how well insulated the boiler is, what the ambient temperature is, how fast the air is moving across the front, is your group shrouded or stitting proudly out the front of the machine etc etc), rather than heating the relatively small amounts of water used (not true for a thermoblock setup of course).
As a bonus, you can then measure all the other stuff eating power in your house, which will probably be quite a lot scarier than the coffee machine
Rather than messing about calculating it - why not just get one of those wattmeter thingies (eg this from jaycar: http://www.jaycar.com.au/productView.asp?ID=MS6115) and run it for a while and see? From memory, my expobar minore costs about $0.10 for the first 1/2 hour (warming up) and then runs at about $0.03 per hour when not making shots (assuming about $0.20/kWh). Unless you are making a _lot_ of coffee and steam I suspect most of the energy used will be making up for the heat lost to the surroundings (depending on things like how well insulated the boiler is, what the ambient temperature is, how fast the air is moving across the front, is your group shrouded or stitting proudly out the front of the machine etc etc), rather than heating the relatively small amounts of water used (not true for a thermoblock setup of course).
As a bonus, you can then measure all the other stuff eating power in your house, which will probably be quite a lot scarier than the coffee machine


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