Combined heat and power plant with fuel cell - THE alternative?

  • Erstellt am 2016-10-22 12:34:54

Saruss

2016-10-22 20:15:08
  • #1
Have you ever looked at the maximum electrical power of the device? It is specified as 15kWh per day, which is 625 W continuous power. The device will cover just a tiny bit of your basic needs, but as soon as you actually use a device (washing machine, hair dryer, microwave, vacuum cleaner, whatever), you have to buy electricity additionally.

from unterwegs
 

MirkoWedel

2016-10-22 20:18:26
  • #2
Average electricity consumption per day is approximately 10kWh. Annual consumption 3500kWh. If the device delivers 15kWh per day, that is 5kWh above my requirement, or have I overlooked something?
 

Alex85

2016-10-22 20:29:05
  • #3


Yes, the post by saruss ;) The 15 kWh might be enough in total per day. The emphasis is on total. saruss demonstrated that this corresponds to 625W continuous power. A vacuum cleaner requires two to three times that. So if you are vacuuming, you mostly buy electricity. It makes no difference what the combined heat and power plant can produce on average per day.

The calculation of whether it is worthwhile is certainly somewhat more complex. In any case, you do not live self-sufficiently with it.
 

Saruss

2016-10-22 20:30:36
  • #4
Yes, I did write, the power!
It's not about the daily amount of energy, but about how much energy the devices use per second!
If the system can provide 625 J (joules) of energy per second, but your washing machine draws 2000 J per second, then you have to buy 1375 joules every second, or the washing machine won't run! Many household appliances (including dishwasher, refrigerator) work in such a way that they require a lot of power in intervals. So the combined heat and power plant can only serve the base load, or low consumers like lamps, standby operations, etc., but if you really need power, that's not enough.

As a comparison, your water is delivered drip by drip, 200 liters of water per day (an average calculation showed that this covers your annual water consumption).. The only problem is if you want to shower at 5 in the morning and then stand there dry..

(too late--- but combined heat and power plants are complicated anyway)
 

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