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Gas OR photovoltaic ?

Monday, August 28, 2017   By: Kevin [2173] 0 Stars
Hello all,

I have a little problem and I dont find correct answers on belgian websites Im from Belgium, Waremme ... I think I can talk with professionals here.

In fact, I would like to be more self-suffisent with all and closer of nature since one moment ... I dream ... And one point very important is energy.
So I dont want to continue with gas, Im interessing by photovoltaic.

But Im hesitating now .. I explain : yesterday, I saw a technician for reparaition of my gas boiler hes a good man so we talk about my problem.

This man was very honest because he said that he doesnt know solar energy, because he only work with gas and oil systems BUT he says to me to take informations on internet. The goal is check what is the best for economy/powerful/ecology.

He explains to me things that I didnt realize about gas : this energy is cheap, very cheap. Its less toxic that oil or other energies. Good reliability. Powerful ...

So I have to consider seriously the question : is it a good advantage to choose solar currently ? Or do you think that I have to continue for may be 10 years with gas, time for solar to improve ?

If you have the choice, what do you choose and why ? Gas or photovoltaic ?

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Monday, August 28, 2017   By: Ross [390] 5 Stars
Hi Kevin, it is very admirable to save the environment. Economics is the answer and you seem to already know that photo-voltaic is not always the answer. I see your latitude is about 50 degrees and that makes photo-voltaic even more uneconomical since you have less sun light per year on average than say in North Africa. Secondly, the life expectancy of photo-voltaic is limited to the glass covering the panel, for the glass gets micro scratches for air borne particulates like from a volcano spewing ash and other volcanic by-products, so what happens is it diffracts the sun light and consequentially diffusing or filtering the sun light and it was bad enough you are at a 50 degree latitude. Cleaning to glass does not solve the problem either. It takes about 20 years to cut the power from sun light nearly in half, and some claim 30 years life then the panel has to be disposed too, so the full cost of ownership should be considered. If you do not have batteries which also have a life expectancy and disposal costs too, then you will need a backup energy source when it becomes cloudy or dark like at night but in reality little or no energy is available from an hour before sunset to an hour after sun rise. Perhaps the best use of capital is to insulate more. Photo-voltaic should be considered when there are no gas or other fuels or other sources of energy, so insulate your structure because it will lessen the demand on energy usage. Ross

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superheated steam ideal gas
By: cmolanes@itba.edu.ar [50]

Mr. Pradeep:

Steam behaves well as an ideal gas if not too close to the saturation line if you place yourself on a Mollier chart, when the temperature and enthalpy lines coincide and are straight, horizontal lines, then it behaves as ideal, and this you can easily see on the chart.

I would rely though most on the steam values given by the chart or steam tables, because they are confident independently of the region , e.g. they stand both for ideal and real gas, but the ideal gas equation ....   Read All
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