Preliminary
What your fans cost to run
- Prepared for
- You
- Company
- Not given
- Site
- Not given
- Date
Your inputs and the headline numbers
| Equipment | |
|---|---|
| Size | |
| Fan motors | |
| City | |
| Power price |
Preliminary
Warmer, wetter air is harder to cool into.
Your tower cools water by handing its heat to the outside air. As the wet-bulb temperature rises, there are fewer degrees between the water and the air, so the same tower works harder for the same cooling.
Degrees between the cold water and the air, on the muggiest hour
Talk to us to find out how we can help. https://intrnls.com/contact.html or contact@intrnls.com
| Climate | Design wet-bulb | Cold water | Margin | Hours muggier | Fan kWh a year |
|---|
The design wet-bulb is the muggiest hour of a normal year (0.4% of hours are muggier). The bars show the middle case of eight climate models; the table adds the high case. The equipment is the same in every row, sized for today.
Preliminary
Your fans work hardest in the summer.
| Measure |
|---|
What if your fans worked less? This is a what-if, not a promise.
| Path | Fan energy a year | Cost a year | Saves a year |
|---|
Preliminary
A model of standard equipment, run on real weather.
We took the hourly weather NOAA recorded for your city from 2011 to 2024 and worked out, for each hour, how hard the fans of a standard tower or air cooler of your size would have to run. We added up a typical year, then multiplied by your power price.
For 2030 and 2050 we shifted that weather by the middle of eight climate models. The numbers describe standard equipment, not our media, and not your exact site.
A short note on the method is on our website.
What changes by 2050
What we would want to know next
- The fan power on the nameplate, and how the fans are controlled.
- The kind of fill or pads in it now, and how old they are.
- How the load changes through the day and the year.
- Your water treatment, and how often the water is drained.
- Your real power price, including demand charges.
Talk to an engineer. Email contact@intrnls.com or use https://intrnls.com/contact.html. We read every message and will get back to you.
Data credits
Weather: NOAA National Centers for Environmental Information, Integrated Surface Database (ISD-Lite), 2011 to 2024, public domain.
Future climate: CMIP6 model output from eight models: ACCESS-CM2 (CSIRO-ARCCSS), CanESM5 (CCCma), EC-Earth3-Veg-LR (EC-Earth-Consortium), GFDL-ESM4 (NOAA-GFDL), INM-CM5-0 (INM), MIROC6 (MIROC), MPI-ESM1-2-HR (MPI-M, DWD, DKRZ) and MRI-ESM2-0 (MRI), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Intrnls reduced the output to monthly change factors and applied them to station weather. The data were modified. We acknowledge the World Climate Research Programme, which, through its Working Group on Coupled Modelling, coordinated and promoted CMIP6. We thank the climate modeling groups for producing and making available their model output, the Earth System Grid Federation (ESGF) for archiving the data and providing access, and the multiple funding agencies who support CMIP6 and ESGF.