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by dirk pitt
03/03/18, 10:32
Forum: Heating, insulation, ventilation, VMC, cooling ...
Subject : Need advice ... What settings for a pellet boiler?
answers: 69
views: 51779

Re: Need advice ... What settings for a pellet boiler?

this is far from a trivial problem and above all, it is difficult to identify the cause. it's not at all sure that your problem is a power problem. I warn against overpowering in pelletized boiler because it is often worse than not enough power. first binds ...
by dirk pitt
01/03/18, 13:09
Forum: Waste, recycling and reuse of old objects
Subject : Photovoltaic Resistive Cost Effective
answers: 178
views: 87820

Re: Photovoltaic Resistive Cost Effective

ahem, ahem, table corner calculation: with a deltaT of 50 ° (15 ° to 65 °) the resistance variation is 4%. really straight, the hyperbole! but it is one all the same. We agree. you shouldn't feel attacked. no need to do sleeve effects to advance your arguments. we're just ...
by dirk pitt
01/03/18, 06:40
Forum: Waste, recycling and reuse of old objects
Subject : Photovoltaic Resistive Cost Effective
answers: 178
views: 87820

Re: Photovoltaic Resistive Cost Effective

For Dirk The present graph is too simplistic even if the philosophy is OK. it's not simplistic, it's just reality. then, you can redraw the same line for a resistance of 4.5Ohm if you want to see where it cuts the sunshine curves but the result will be similar. after, ...
by dirk pitt
28/02/18, 17:24
Forum: Waste, recycling and reuse of old objects
Subject : Photovoltaic Resistive Cost Effective
answers: 178
views: 87820

Re: Photovoltaic Resistive Cost Effective

a little supplement for pedagogy: here is the performance graph of your panel on which I drew a fixed resistance line = 4 ohms. you say that the resistance is 3.1ohm cold so it should be roughly that in heating. no matter the value, the reasoning is the same. curve PV3.jpg with ...
by dirk pitt
28/02/18, 11:43
Forum: Waste, recycling and reuse of old objects
Subject : Photovoltaic Resistive Cost Effective
answers: 178
views: 87820

Re: Photovoltaic Resistive Cost Effective

the U / I and P / U curves of a PV panel are roughly that tension_courant_puissance_photovoltaique_mpp.jpg so we see that the area where the power is maximum is quite small. you need exactly the right voltage / current pair. we could say: no worries, it suffices to have resistance R ...
by dirk pitt
28/02/18, 10:39
Forum: Waste, recycling and reuse of old objects
Subject : Photovoltaic Resistive Cost Effective
answers: 178
views: 87820

Re: Photovoltaic Resistive Cost Effective

It must be the case, according to the diagram the water heater is 50l. even a 50L water heater, it will be hard to heat properly with a 250Wc panel connected directly without MPPT. it would take at minimum, minimum 500W real to hope to heat the water at an acceptable speed. which means about one ...
by dirk pitt
28/02/18, 10:26
Forum: Failure, troubleshooting and repair: repair yourself?
Subject : Invertarc Pro 160 CEVAL electronic schema?
answers: 18
views: 21542

Re: Invertact Pro 160 CEVAL Electronic Diagram?

in the photo, the MOSFET was exploded cleanly and did not burn.
there is a good chance that you find the missing piece at the bottom of the UPS box and that you can read the reference indicated.
good luck
by dirk pitt
27/02/18, 22:22
Forum: Waste, recycling and reuse of old objects
Subject : Photovoltaic Resistive Cost Effective
answers: 178
views: 87820

Re: Photovoltaic Resistive Cost Effective

with a 250Wp panel, I doubt very much that we can have hot water every day for a family.
a must for a single person who does not consume too much hot water.
by dirk pitt
23/02/18, 06:42
Forum: electric transport: cars, bicycles, public transport, planes ...
Subject : polluting electric car?
answers: 328
views: 94932

Return to posts index Reply Like Re: Electric car polluting?

I see it differently: what would I do if I had to live in autarky with the local means? first I should limit my travel to the maximum second the local resource available to make energy is wood ... you have to make electricity with it and drag batteries ...

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