Description: | Collection of all weather events related to local station |
See the Weather Station Property Reference for a detailed list of properties for this class of object.
A weather station is linked to a gas demand through a gas node membership.
The connection relationships between Weather Station and Gas Node classes are as follows:
To use weather data when calculating demand, update the Demand Type property in the linked gas demand. Additional properties must be specified in the linked gas demand object to use weather and wind data.
Example:
To calculate demand, we have a piecewise demand function.
When Gas Demand Demand Type is Input, the demand function is calculated as normal without weather data.
When Demand Type is Temperature ( or Heating Degree Days) the following formula is used.
Demand = Customer Count * (Usage Factor Base + (Usage Factor Heat * Temperature) + (Weather Data Factor * Wind))
Assume the weather station temperature is 55 and the following are the required demand inputs.
Property | Value | Units | Band |
---|---|---|---|
Demand | - | MMBTu | 1 |
Demand Type | Temperature | - | 1 |
Customer Count | 5 | - | 1 |
Usage Factor Base | 1 | - | 1 |
Usage Factor Heat | 2 | - | 1 |
Usage Factor Heat | 3 | - | 2 |
Usage Factor Heat | 4 | - | 3 |
Usage Factor Heat Point | 20 | - | 1 |
Usage Factor Heat Point | 40 | - | 2 |
Usage Factor Heat Point | 80 | - | 3 |
Property | Value | Units | Band |
---|---|---|---|
Weather Data Factor | 2 | - | 1 |
Weather Data Factor | 4 | - | 2 |
Weather Data Variable | 5 | - | 1 |
Weather Data Variable | 20 | - | 2 |
See also: