IS428 2016-17 Term1 Assign3 Jonathan Eduard Chua Lim

Questions

As an expert in visual analytics, you have been hired to help GAStech understand its operations data. In this assignment, you are given two weeks of building and prox sensor data. Can you use visual analytics to identify typical patterns of and issues of concern?

You will be asked to answer the following types of questions:

1. What are the typical patterns in the prox card data? What does a typical day look like for GAStech employees?
2. Describe up to ten of the most interesting patterns that appear in the building data. Describe what is notable about the pattern and explain its possible significance.
3. Describe up to ten notable anomalies or unusual events you see in the data. Prioritize those issues that are most likely to represent a danger or a serious issue for building operations.
4. Describe up to five observed relationships between the proximity card data and building data elements. If you find a causal relationship (for example, a building event or condition leading to personnel behavior changes or personnel activity leading to building operations changes), describe your discovered cause and effect, the evidence you found to support it, and your level of confidence in your assessment of the relationship.

HVAC Information and its Significance

Field	Units	Description
F_#_BATH_EXHAUST:Fan Power	[W]	Power used by the bathroom exhaust fan
F_#_VAV_SYS AIR LOOP INLET Mass Flow Rate	[kg/s]	Total flow rate of air returning to the HVAC system from all zones it serves
F_#_VAV_SYS AIR LOOP INLET Temperature	[C]	Mixed temperature of air returning to the HVAC system from all zones it serves
F_# VAV Availability Manager Night Cycle Control Status		On/off status of the HVAC system during periods when the system is normally scheduled off. The night cycle manager cycles the HVAC system to maintain night and weekend set point temperatures.
F_#_VAV_SYS COOLING COIL Power	[W]	Power used by the HVAC system cooling coil
F_#_VAV_SYS HEATING COIL Power	[W]	Power used by the HVAC system heating coil
F_#_VAV_SYS SUPPLY FAN OUTLET Mass Flow Rate	[kg/s]	Total flow rate of air delivered by the HVAC system fan to the zones it serves
F_#_VAV_SYS SUPPLY FAN OUTLET Temperature	[C]	Temperature of the air exiting the HVAC system fan
F_#_VAV_SYS SUPPLY FAN:Fan Power	[W]	Power used by the HVAC system fan
F_#_VAV_SYS Outdoor Air Flow Fraction		Percentage of total air delivered by the HVAC system that is from the outside
F_#_VAV_SYS Outdoor Air Mass Flow Rate	[kg/s]	Flow rate of outside air entering the HVAC system
COOL Schedule Value	Example	The supply air temperature set point. Air exiting the HVAC system fan is maintained at this temperature during cooling operation
DELI-FAN Power	[W]	Power used by the deli exhaust fan
Drybulb Temperature	[C]	Drybulb temperature of the outside air
Wind Direction	[deg]	Direction of wind outside of the building
Wind Speed	[m/s]	Speed of wind outside of the building
HEAT Schedule Value		The supply air temperature set point. Air exiting the HVAC system fan is maintained at this temperature during heating operation
Pump Power	[W]	Power used by the hot water system pump
Water Heater Setpoint		Water heater set point temperature
Water Heater Gas Rate	[W]	Rate at which the water heater burns natural gas
Water Heater Tank Temperature	[C]	Temperature of the water inside the hot water heater
Loop Temp Schedule	Example	Temperature set point of the hot water loop. This is the temperature at which hot water is delivered to hot water appliances and fixtures.
Supply Side Inlet Mass Flow Rate	[kg/s]	Flow rate of water entering the hot water heater
Supply Side Inlet Temperature	[C]	Temperature of the water entering the hot water heater
Supply Side Outlet Temperature	[C]	Temperature of the water exiting the hot water heater
F_#_Z_# REHEAT COIL Power	[W]	Power used by the zone air supply box reheat coil
F_#_Z_# RETURN OUTLET CO2 Concentration	[ppm]	Concentration of C02 measured at the zone's return air grille
F_#_Z_# SUPPLY INLET Mass Flow Rate	[kg/s]	Flow rate of the air entering the zone from its air supply
F_#_Z_# SUPPLY INLET Temperature	[C]	Temperature of the air entering the zone from its air supply
F_#_Z_# VAV REHEAT Damper Position		Position of the zone's air supply box damper. 1 corresponds to fully open, 0 corresponds to fully closed
F_#_Z_#: Equipment Power	[W]	[W] Power used by the electric equipment in the zone
F_#_Z_#: Lights Power	[W]	Power used by the lights in the zone
F_#_Z_#: Mechanical Ventilation Mass Flow Rate	[kg/s]	Ventilation rate of the zone exhaust fan
F_#_Z_#: Thermostat Temp	[C]	Temperature of the air inside the zone
F_#_Z_#: Thermostat Cooling Setpoint	[C]	Cooling set point schedule for the zone
F_#_Z_#: Thermostat Heating Setpoint	[C]	Heating set point schedule for the zone
Total Electric Demand Power	[W]	Total power used by the building
HVAC Electric Demand Power	[W]	Total power used by the building's HVAC system including coils, fans and pumps.

Data Cleaning

1. Prepare Employee Data

I have used JMP to generate the Prox ID format based on the Employees' first name and last name. After which, I used the "concat" formula in JMP.

I used Excel to standardise the Mobile Prox's Prox ID variable, removing the 3 digit code in the Prox ID. I used the formula- =Left(D2, Len(D2)-3) (Credits to Chua Shan Yong James)

The data contains Quotations marks, so I used Excel's Text to Columns Functions to remove it. I repeated these steps to the Fixed Prox Data as well