off-grid at its best |
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a thermal and electric energy generator... |
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efficient
supply the ecopower CHPU pumping power on demand into the domestic grid |
intelligent management |
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three units SMA Sunny Island rectifiers (yellow, on the left) managing the grid, the consumption and the generation; domestic 3-phase grid 230/400VAC 50Hz |
logic logistics |
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clearly laid out piping and manifolds heat exchanger pumps gas supply sensors exhaust condensate pump |
sufficient thermal storage |
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generously designed hot water buffer tanks 4,500 ltr |
comfortable battery capacity |
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gel battery block (in the back below the PC) 600 Ah 60 VDC |
wind... |
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Not really a success story as winds tend to come and go and storing the energy eats up most of what is generated... ..does anyone have better results? 7.5kW wind generator |
the wood chip boiler... |
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...with lots of trees around originally seemed to be the logical solution; however, trees grow slowly... take time... take risks... they store CO2 in form of C (> carbon sink) and make a nice habitat. Felling and chipping takes a lot of energy... and generates no electricity. enlarge |
some background |
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The challenges of installing an "island solution" or "stand-alone grid" depend on the actual electric load that needs to be covered but also on its peak loads; both are obviously and directly depending on the installed electric consumers. The daily consumption of the above installation was calculated at app. 65 kWh per day with its highs in the late morning hours whereas consumption at nights would well drop down to 1 or 2 kWh. An ideal set-up for a power controlled modulatable CHPUnit. The combination of above equipment controlled by intelligent software now allows to generate power (electricity and heat) according to the actual demand, not - in comparison and what is the usual - to just generate power in order to cover what might be needed. By the way, the above set-up supplies sufficient electric power and thermal heat almost all the year round for a >20,000 sq ft complex. |
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plans... ideas... |
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... installing some photovoltaic cells for the sunny hours would help to reduce the hours of the CHP ecopower running in warm conditions during summer; but at ± £4/W it seems to become an expensive venture. Well, we'll see... Any offers, ideas, input, comments welcomed, here, please! |
before... |
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... you comment: we have learned that it is pretty easy, modern and part of the Zeitgeist to talk about "renewables" and the need to switch to those. But where are the real examples that do work without huge subsidies or beyond enthusiastic and empiric goodwill? Let us hear, please! |
NEW
rock's blog:
efficiency
meets
sustainability
sustainability
⇒ basement basics
⇒ model: basement
⇒ save £ 21,200
⇒ CHP makes sense!
⇒ CHP project details
facts and figures
⇒ warm foundation
⇒ hotels, only!
⇒ history of CO2
⇒ CO2 and friends...
⇒ off-grid, or, DIY energy
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