A figure marked upper bound has run every hour of each month at that month's design dry bulb, not its mean. Real weather is cooler than that most of the time, so the plant is expected to use less.
The two bases
- Expected · typical weather: each month's hours are spread over the ambients the weather station's monthly statistics give, and the cycle is solved at each. This is what the plant is expected to use in a typical year.
- Upper bound · design-high: every hour of each month at its design-high dry bulb, for a conservative figure.
Expected consumption needs the project's own location, because it uses that weather station's monthly statistics. A preset city, a town from the regional climate library or a custom profile has only design-high figures, so an analysis on one is always an upper bound.
Get expected consumption
- 1
On Cycle, set the project's location under Project location: type it into Where is the project? and choose its Weather station.
- 2
On Energy, under Town, choose the project location. It reads “Project location —” and the station's name, and a new analysis starts on it.
- 3
Choose Expected · typical weather.
- 4
Save the analysis. It keeps the statistics it ran on, whatever later happens to the station's record.
If Energy says “Expected consumption isn't available here”, the station's record doesn't carry the statistics needed. The analysis then runs on design-high figures and says so.
When a figure is neither
Compressor energy isn't counted for any hours or months whose cycle didn't solve, and the page names them. On the expected basis that makes the annual figures a lower bound. On the design-high basis it makes them neither an upper nor a lower bound, and the page says that too.