The graphic below shows the real time heat pump savings on a system we installed in Wyoming

You can see current info here

I don't understand your numbers. Your old system would have cost you near $70 for the month. $70 x 12 months would come to $840, and in theory you'd use less in the summer months, so it should be less than $840, yet you spent $2200 on propane. Do you BBQ a lot?

The month is not 1/2 over yet.

Now it makes sense.

Hi Dewayne,

I keep wanting to call you and I will one of these days.

Your numbers on cost per day are really hard to swallow for me when my average cost per day is about $6 and I'm no where near the low temperature you have in your example.

Good job.

John

BTW, sure wish I had those EWT.

I'm slightly confused - is the "value" of heat extracted today vs "cost" of heat extracted today a way of stating the system's electrical COP?

Or is it a comparision to the prior system's use of propane?

The "value of heat extracted today" represents what the cost to the customer would have been if he was still using his propane furnace.

My intent in doing this is to show the savings the customer is realizing by having made the switch to geothermal.

I am open to suggestions as to how best to present the data.

When figuring the cost per day, what is the electricity cost per KWH at this site/customer? Just curious, how my area compares. I think we're around $0.08 for non-peak/base and $0.10 peak/otherwise. Thanks, Colin

I would add in your cost per KWh and maybe what propane cost was per gallon when you paid $2200.

Thanks for the suggestions


Here is is with the updates:

Wow that’s cheap electricity, unless it's off peak, we are at $.06/kwh off peak and $.22 on peak, typically our utility is $.11/kwh regular rates.

Could you put a side by side compared to propane? So on the daily line $1.70 and (if propane used $x.xx) I guess you would have to figure out btu's used, but once you had the calculation done it could be automatic. That would be neat and easy to see, maybe a last month’s total as well?

This is good hard data

I wonder if it might be clearer with some replacement descriptors:

"Daily Cost" is actually "Today's cost"

"Monthly Cost" is actually "This month's cost to date" or "so far"

"Value of heat Extracted Today" substitute "Burning Propane Today would have cost..."

"Value of extracted heat month" substitute "Burning Propane this month would have cost so far"

I'm not sure how "Monthly cost of heating with old system" figures in to this - is it a 'so far' number or whole month number? Neither seems to fit the math.

The $62 "savings this month" figure confuses me as well - is it a whole month or 'this month so far' avoided cost of burning propane?

I sense that what you are trying to get at is sort of a 'propane COP' and precisely quantifying monthly savings in a real world comparison factoring in actual weather - all good stuff, but sufficiently complicated so as to need explicit, crystal clear reasoning to overcome natural skepticism at being asked to fork out 5 figures for a geo system.

Good Ideas ...this is getting better:)

I only have a few days data for Nov, so can't do last month.   $.07 is what we pay in Utah and Wyoming,  no off peak billing here.

As engineer stated,  the intent is to help people feel more inclined to "...to fork out 5 figures for a geo system"


Here is the latest version:

That looks good

Dewayne, if you keep installing WEL units with your installations, and keep programming the WEL units to show the kind of numbers you're showing above, and keep showing prospective customers the WEL public pages, you'll have more business than you can stand!  Nice job quickly learning how powerful the WEL can present operational and cost data to clearly understand real time and historical performance and costs!

I took the queue from your examples and created a cost per day chart for my system - thanks.

Best regards,

Bill

http://welserver.com/WEL0043

 

Thanks Bill,

How did you get the new graph to show at the top of the page? On time I tried moving the graphs around and lost all of the historical data.

Dewayne, each chart on the public web page is presented in the same order as specified in your you WEL ( http://www.welserver.com ) graphs specification page.

In my case, I wanted the daily HVAC cost to be the first chart ( http://welserver.com/WEL0043 ).  I thus had to specify it in the first graphs specification 'slot.'

Since I'm 'full up' on total number of charts, I first had to get rid of an existing chart.  To do this, simply blank out that chart's 'slot' from the graphs specificiation page.  But don't click Submit yet!

Now carefully slide down all of the above graph specification 'slots' until the blank 'slot' is at the top - the first 'slot.'

Now specify what ever you want as your first chart in the first 'slot' of the graphs specification page.

If you're good with Windows 'cuttting' and 'pasting,' this isn't hard, and, it eliminates possibility of making a manual typing error.  You do need to be very careful not to accidently hit the Enter button or the Return button.

Yes, if you have historical data, you want to quadruple check your work before you click on Submit, or yes indeed you'll lose the all that data.  I'm especially careful when I mess with some of my charts that are near or beyond 1 year's worth of data (like my one year historical trend of EWT I now have).

Hope this helps.

Best regards,

Bill