Instrumented Building Systems:

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Wall Temperatures Temperature sensors are embedded one inch apart through the solid, pre-cast concrete interior walls  of the south light monitor. These sensors record the effects of solar orientation and thermal characteristics of concrete. Sensors, also located at each change of material throughout a composite exterior wall, measure inside and outside temperatures. This allows for the comparison of the actual thermal gradient with the predicted one.

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Window Glazing Six different types of glazing are installed as part of the south-side windows of the ITLL basement. Sensors on both the inside and the outside of the window measure the temperature of the glass. These data support thermodynamic calculations (e.g., heat transfer and flux) for the various glazing types.

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Building Air Temperature Stratification In the ITLL building, eleven sensors vertically aligned at approximately 6 ft. intervals from the roof to the basement are used to measure building air temperature stratification.

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Air Handling Unit The air handling unit, a part of the heating, ventilation and air conditioning (HVAC) system, is used to mix fresh outdoor air with air from the actual building space. The air is either cooled or heated and then returned to the duct system to be distributed throughout the building. The air conditioning unit cools, heats and dries the air in the computer rooms, which are located in the basement of the ITLL Building.

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Weather Station The weather station is located on the roof of the ITLL building. The location of Boulder, Colorado (40° latitude and 105° longitude) offers a wide range of weather conditions. The weather station measures the following: 1) barometric pressure, 2) maximum wind speed, 3) average wind speed 4) wind direction, 5) outside air humidity, and 6) outside air temperature.

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Systems Awaiting Instrumentation:

The following systems have all sensors and data acquisition in place, but have not been published to the web. If you are interested in developing an experiment involving these systems, please contact the ITL Staff.

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Variable Air Volume (VAV) System The ITLL building ventilation system is a variable air volume (VAV) system. The VAV terminal units are responsible for supplying sufficient air volume to maintain consistent temperature and acceptable air quality.

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Cooling Tower The cooling tower provides cooled water (or glycol solution) to the air handling unit.

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Heat Exchanger The heat exchanger uses steam from the main campus boiler to heat water for use in the various heating coils located throughout the building. The heated water is circulated by heating water pumps to the heating coils in the cabinet unit heaters, fintube radiators and reheat coils in the zone variable air volume boxes.

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Baseboard Radiators The baseboard radiators provide heat to a designated space by air flowing across a water-heated coil. These radiators are generally placed along outside walls and below windows to prevent cold downdrafts along the walls.

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Structural Building System Vibrating wire strain gauges are located in the foundation, column system and the trusses of the ITLL. The strain due to loads can be obtained from these strain gauges, and the stresses can be calculated to study the distributions of tensile and compressive forces in the structural system.

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