Measuring CO 2 emissions as a Basis for Understanding Indoor Air Quality and Room Ventilation Mercedes Winfrey, Von P. Walden Laboratory for Atmospheric Research, LAR Atmospheric Chemistry REU Washington State University (WSU) is collaborating to make Spokane, Washington a leader in smart city technologies. The Smart Cities Project will use smart sensor technology to provide better management of resources (such as energy and water) while also promoting health and well - being in the city. The Laboratory for Atmospheric Research at WSU is developing a sensor package for monitoring air quality for the Smart Cities Project, using various sensors to measure carbon dioxide, ozone, nitrogen dioxide, and particulate matter (particles from smoke and pollution).These sensors have been interfaced to a Raspberry Pi computer and are being mounted into a weather - proof 3 - D printed container. As an initial test, we will measure the indoor air quality and relaxation time with a cost - efficient CO 2 sensor within a laboratory in the new PACCAR Environmental Technology Building at WSU. Carbon dioxide will be released into the lab periodically, and we will analyze the data on how the gas is disbursed within room. Various sensors will be mounted into the weather - proof container for eventual deployment on light posts in Spokane as part of the Smart Cities Project. • Despite the low cost of the K - 30 sensors, they are still able to accurately detect CO 2 in the laboratory. • The relaxation time from the laboratory is low. • The ventilation of the laboratory is high. Determine the accuracy of the data from the K - 30 sensor by comparing it to the expensive LI - COR 820 Gas Analyzer. (LI - COR being used in the study on indoor air quality of residential homes) Calculate the relaxation time using an exponential curve fit of the carbon dioxide dissipates from the laboratory. Correlate r elaxation time to room ventilation. Create a weather - proof 3D printed container to house sensor package. All these sensors detect CO 2 during scheduled releases. LI-COR more accurate. (LI-COR data received every second;K-30 data received every minute) BACKGROUND PURPOSE TESTING AND ANALYZING OF CO 2 SENSOR CONCLUSIONS FUTURE METHODS CO2 released every 2 hours for 2 minutes when valve was open . = = 4.167 ACKNOWLEDGEMENTS Acknowledgements :Kirk Reinkens ( Voiland College of Engineering and Architecture), Shelley N. Pressley(Civil Engineering), Patrick O’Keefe . This research supported by the National Science Foundation‘s REU program under grant number : AGS - 1461292 DESIGN AND CONSTRUCTION OF AN AQ CONTAINER 1 . Raspberry Pi (K - 30 CO 2 sensor) K - 30, uses Gaslab ® software for setup, calibration, data logging, and real - time data analysis. This allows an engineer to use the K - 30 in a rapid development, evaluation, or prototyping environment. Gaslab makes it easy to export data into CSV. The K - 30 is interfaced with a Raspberry Pi. A Raspberry Pi is a small computing devices “CPU,” designed for basic programming. We can run our CSV files through Python, a programming language, to visually display data. 2. LI - COR 820 Closed - Path CO 2 sensor Cutting edge gas analyzer for research applications. The LI - COR 820 CO 2 Analyzer is designed for continuous monitoring applications that require accuracy, durability, and ease of use. The Li - 820 is an absolute non - dispersive infrared (NDIR) gas analyzer based upon a single path, dual wavelength infrared detection system. The low - maintenance, high - performance monitoring solution gives accurate, stable readings over a wide range of environmental conditions. 3. uPrint SE 3D Printer uPrint SE offers larger ABS - plus models and offers networking for easy sharing. It’s a perfect solution for small projects. 3D modeling is the key to effective prototyping and communication. Many rely on uPrint SE to test and perfect their work with 3D modeling. This printer uses FDM Technology to build in real ABS - plus thermoplastic, resulting in models and functional prototypes that are durable, stable and accurate. I was able to print a 3D printed weather proof container. 4. Trotec Speedy 300 Laser Trotec lasers are the fast and productive systems. Speedy 300 offers a top speed (355cm/sec. CO 2 ), with an acceleration of 5 g. The Speedy is the ideal laser engraving machine. Speedy lasers are high - quality, low maintenance and user - friendly systems that can process a wide array of materials. With this, I was able to cut acrylic walls and a top that can be easily removed from the foundation. Ventilation slots • Allow continuous airflow to devices Removable section dividers • aid in easy sensor accessibility. Acrylic panels • Visibility SketchUp , a 3D modeling software • Creation of raw box design
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Measuring CO2 emissions as a Basis for Understanding Indoor Air Quality and Room Ventilation
Mercedes Winfrey, Von P. WaldenLaboratory for Atmospheric Research, LAR Atmospheric Chemistry REU
v Washington State University (WSU) is collaborating to make Spokane, Washington a leader in smart city technologies.
v The Smart Cities Project will use smart sensor technology to provide better management of resources (such as energy and water) while also promoting health and well-being in the city.
v The Laboratory for Atmospheric Research at WSU is developing a sensor package for monitoring air quality for the Smart Cities Project, using various sensors to measure carbon dioxide, ozone, nitrogen dioxide, and particulate matter (particles from smoke and pollution).These sensors have been interfaced to a Raspberry Pi computer and are being mounted into a weather-proof 3-D printed container.
v As an initial test, we will measure the indoor air quality and relaxation time with a cost-efficient CO2 sensor within a laboratory in the new PACCAR Environmental Technology Building at WSU.
v Carbon dioxide will be released into the lab periodically, and we will analyze the data on how the gas is disbursed within room.
Various sensors will be mounted into the weather-proof container for eventual deployment on light posts in Spokane as part of the
Smart Cities Project.
• Despite the low cost of the K-30 sensors, they are still able to accurately detect CO2 in the laboratory.
• The relaxation time from the laboratory is low.
• The ventilation of the laboratory is high.
vDetermine the accuracy of the data from the K-30 sensor by comparing it to the expensive LI-COR 820 Gas Analyzer. (LI-COR being used in the study on indoor air quality of residential homes)
vCalculate the relaxation time using an exponential curve fit of the carbon dioxide dissipates from the laboratory.
vCorrelate relaxation time to room ventilation.
vCreate a weather-proof 3D printed container to house sensor package.
All these sensors detect CO2 during scheduled releases. LI-COR more accurate. (LI-COR data received every second;K-30 data received
every minute)
BACKGROUND
PURPOSE
TESTING AND ANALYZING OF CO2 SENSOR
CONCLUSIONS
FUTURE
METHODS
CO2 released every 2 hours for 2 minutes when valve was open.𝜏= 𝑟𝑒𝑙𝑎𝑥𝑎𝑡𝑖𝑜𝑛 𝑡𝑖𝑚𝑒 = 4.167 𝑚𝑖𝑛𝑢𝑡𝑒𝑠
ACKNOWLEDGEMENTS
Acknowledgements :Kirk Reinkens(VoilandCollege of Engineering and Architecture), Shelley N.
Pressley(Civil Engineering), Patrick O’Keefe. This research supported by the National Science Foundation‘s REU program
under grant number: AGS-1461292
DESIGN AND CONSTRUCTION OF AN AQ CONTAINER
1. Raspberry Pi (K-30 CO2 sensor)K-30, uses Gaslab® software for setup, calibration, data logging, and real-time data analysis. This allows an engineer to use the K-30 in a rapid development, evaluation, or prototyping environment. Gaslab makes it easy to export data into CSV. The K-30 is interfaced with a Raspberry Pi. A Raspberry Pi is a small computing devices “CPU,” designed for basic programming. We can run our CSV files through Python, a programming language, to visually display data.
2. LI-COR 820 Closed-Path CO2 sensor Cutting edge gas analyzer for research applications. The LI-COR 820 CO2 Analyzer is designed for continuous monitoring applications that require accuracy, durability, and ease of use. The Li-820 is an absolute non-dispersive infrared (NDIR) gas analyzer based upon a single path, dual wavelength infrared detection system. The low-maintenance, high-performance monitoring solution gives accurate, stable readings over a wide range of environmental conditions.
3. uPrint SE 3D PrinteruPrint SE offers larger ABS-plus models and offers networking for easy sharing. It’s a perfect solution for small projects. 3D modeling is the key to effective prototyping and communication. Many rely on uPrint SE to test and perfect their work with 3D modeling. This printer uses FDM Technology to build in real ABS-plus thermoplastic, resulting in models and functional prototypes that are durable, stable and accurate. I was able to print a 3D printed weather proof container.
4. Trotec Speedy 300 LaserTrotec lasers are the fast and productive systems. Speedy 300 offers a top speed (355cm/sec. CO2), with an acceleration of 5 g. The Speedy is the ideal laser engraving machine. Speedy lasers are high-quality, low maintenance and user-friendly systems that can process a wide array of materials. With this, I was able to cut acrylic walls and a top that can be easily removed from the foundation.
vVentilation slots
• Allow continuous airflow to devices
vRemovable section dividers
• aid in easy sensor accessibility.
vAcrylic panels
• Visibility
vSketchUp, a 3D modeling software
• Creation of raw box design
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