Data for HVAC analytics
General information
Building operation is (or at least shall be) determined by a schedule. Therefore we need some information about regimes in the building (at least non-stop operation vs. office hours determined operation). We do not read this information directly from BMS. It shall be defined by facility management in order to validate BMS setting. This applies to all analytical topics listed below.
We do not require outdoor temperature (humidity, pressure,…), we use independent data source.
Bellow is a list of recommend variables for each analytical topic.
Heating circuit
| Signal | Type | Note |
|---|---|---|
| Supply water temperature | measurement and setpoint | |
| Return water temperature | measurement | |
| Pump | measurement or setpoint | |
| Valve | setpoint |
Energy meter
| Signal | Type | Note |
|---|---|---|
| Cumulative meter value | measurement | “Energy” measurement is more valuable than “power” for the analysis |
Indoor air quality
| Signal | Type | Note |
|---|---|---|
| Indoor temperature | measurement and setpoint |
Air handling unit
AHU is a complex appliance and there is no unified set of variables that are need for AHU analysis. We try to use all data that are provided. Usually, AHU is described by 15 - 30 relevant variables.
Information about heat recovery type (plate, wheel or glycol) is also needed as well as operation schedule.
| Signal | Type | Note |
|---|---|---|
| fans | measurement or setpoint | fan state, frequency converter data |
| heating | measurement or setpoint | supply and return temperatures, pump and valve |
| cooling | measurement or setpoint | supply and return temperatures, pump and valve |
| humidifier | measurement or setpoint | |
| heat recovery | measurement or setpoint | bypass position, wheel speed |
| air temperatures | measurement and setpoint | supply, zone, outlet |
| dampers | measurement or setpoint |