<div>Thanks Leo for your answer.</div><div><br></div><div>The whole idea in energy efficiency is management of energy consumed vs units produced. For that, the energy is measured and also, at the same time, the production. With both data then a linear reggression is made. That yields in a line equation: y=mx+b. If notation is changed then the equation is E=mP+Eo where E is the total energy, mP is the energy used to produce 1 unit associated to process technology called Energy Associated to Production (EAP) and Eo is called Energy No Associated to Production, ENAP because if you make 0 the production there are some energy consumed, say ilumination, or computers and other equipment that consumes energy but don't produce units.</div>
<div><br></div><div>That's one of many reasons why is necessary to graph Energy vs. Production. There are other indicators as efficency (E/P) and graphs shows how an enterprise or process works in general and if they are near or far from ideal production or close to maximum production.</div>
<div><br></div><div>To keep thing simple, it's like a car. Better than average speed, shown in a graph as the speed vs the time, it would be more interesting to know how many miles or kilometers, the car makes with a gallon of fuel. Energy efficency is related to that. Would need to create a graph that shows gallons (Energy) per mile (production), and see how it behaves. All data are measured as a time series, the periodic reading of energy (fuel) and at the same time, miles traveled.</div>
<div><br></div><div>I was thinking to change the source code of RRDTool to allow diferent data in X-Axis, not just time, leaving the rest of code as is. By this way the database creation and upgrade will be the same but graph could use one database for Y-Axis and another for X-Axis only and just only if they have the same delta time.</div>
<div><br></div><div>Maybe is easier to use a diferent software for display the data and keep the rest of RDDTool software as is.</div><div>I'll try to see wich is the best option.</div><div><br></div><div>Thanks for your time</div>
<div><br></div><div>Best Regards</div><div><br></div><div>Francisco Perea</div><div>Electrical engineer, MSc.</div><div><br></div><div>keep in control how many energy a proccess consum<br><br><div class="gmail_quote">2011/10/17 <span dir="ltr"><<a href="mailto:j.halifax2@seznam.cz">j.halifax2@seznam.cz</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><br>
Hi Francesco,<br>
<br>
<br>
If you are dealing with efficiency, you probably need to visualize its values in time<br>
moments of T = {t1, t2, ..., tn} in different levels of aggregations.<br>
<br>
Say that you have one time series of the production P(ti) and another time series of<br>
the consumption C(ti). You can calculate the efficiency time series as E(ti) = F(P(ti),<br>
C(ti)), where i = (1, 2, ..., n). Here F(P(ti), C(ti)) can be for example P(ti) / C(ti) or any<br>
other reasonable function of the production and consumption.<br>
<br>
If you can measure P(ti) and C(ti) in equidistant time moments (i.e. their periods of<br>
t(i) - t(i-1) are constant), you can generate nice graphs of development of Efficiency<br>
(which you are interesting in) in time.<br>
<br>
Together with graphing P(ti) and C(ti), such graphs could tell your technology guys<br>
much about dependence of their efficiency on the production, consumption and even<br>
help them disclosing energy loss in the grid including illegal consumption etc.<br>
<br>
Isn't it what you would like?<br>
<br>
<br>
Regards,<br>
Leos<br>
<div><div></div><div class="h5"><br>
> From: rrd-users-bounces+s.shipway=<a href="mailto:auckland.ac.nz@lists.oetiker.ch">auckland.ac.nz@lists.oetiker.ch</a><br>
> [mailto:<a href="mailto:rrd-users-bounces%2Bs.shipway">rrd-users-bounces+s.shipway</a>=<a href="mailto:auckland.ac.nz@lists.oetiker.ch">auckland.ac.nz@lists.oetiker.ch</a>] On<br>
> Behalf Of Francisco Abel Perea Mora<br>
> Sent: Tuesday, 18 October 2011 11:59 a.m.<br>
> To: <a href="mailto:rrd-users@lists.oetiker.ch">rrd-users@lists.oetiker.ch</a><br>
> Subject: [rrd-users] Changing X-Axis<br>
><br>
><br>
><br>
> Hi,<br>
><br>
><br>
><br>
> After searching for hours how to setup X-Axis I still have a question<br>
><br>
> I'm working with energy efficency. We take measures from energy consumption<br>
> and production at the same time. As an example say:<br>
><br>
> Month Energy Production<br>
><br>
> [KWh] [Ton]<br>
><br>
> march-98 138480 2161680<br>
><br>
> april-98 122880 2103370<br>
><br>
> may-98 155280 2401320<br>
><br>
> jun-98 157920 2537565<br>
><br>
> jul-98 159600 2303359<br>
><br>
> aug-98 177600 2811775<br>
><br>
><br>
><br>
> An so on. The interesting graph in this time series is Energy vs.<br>
> Production. Is possible to graph this with RRDTool? By default X-Axis is<br>
> always fixed to time series, but I need to change that to Production and<br>
> setup Y-Axis to Energy. How could I do this?<br>
><br>
><br>
><br>
><br>
><br>
><br>
</div></div></blockquote></div><br></div>