Radek Žert, O2 Czech Republic a.s.

Miloš Žáček, Protronix s.r.o.

Healthy School ProjectIs school environment really healthy for our kids?

Project information

Environment monitoring - Healthy school

• Since February 2017

• At Smíchovská střední průmyslová škola(technical high school in Prague, historical building)

Goals

• Analyze indoor air quality in selected classrooms of selected high school (CO2

concentration, humidity, temperature)

• Assess the impact of outdoor air quality and noise on the classroom conditions

• Provide students with measurement data to improve learning

Source: Google Maps

What does indoor air quality mean?

Air pollution caused by humans

How the quality of indoor air is measured?

Principle of NDIR method of CO2 measurement

NDIR – nondispersive infrared

Back to the basics – what is ppm about?

CO2 is measured in concentration units - ppm

- 1 ppm

- 999 999

- 1

1 000 000

parts per million

1 / 1000 000

5 000 ppm Maximum hygienic limit value

2 000 – 5 000 ppm Headache, tiredness, drowsiness

1 000 – 2 000 ppmCommon discomfort, reduced ability to concentrate

800 – 1 000 ppm Recommended concentration in a room

400 – 600 ppm Risk of over-ventilation – waste of energy

350 – 450 ppm Common outdoor concentration

Impact of indoor air quality on students

Live demo – how do you feel right now?

Indoor air quality measurement in this conference room

Overview of the technical implementation

• Local IQRF mesh network with PROTRONIX sensors for indoor air monitoring

• CAMEA units for on-site outdoor air monitoring

• CESVA sensor for outdoor noise level monitoring

• Data normalization, storage and presentation

Verified Conclusions – pilot installation

• Remote GW management

• Resin.io was used for pilot installation as fleet management application for rapid and fault-tolerant development

• Sensor management

• Coordinated locally

• Part of the IoT Data Platform in the future

• In cooperation with IQRF Alliance a sensor reading application was developed (10 messages/90 sec)

LOCAL

NETWORK

CLOUD

PLATFORM

CLOUD PLATFORM

• Already used in production for other projects

• Supports identification of non-standard and operational events

• Immediate visualization of received data

• Integration with SaaS enables remote deployment of functional code to GWs

• In massive infrastructures,inventory management becomes crucial

IoT Data Platform workshop

• Interested in the platform architecture? Visit our workshop today at 12:00 (Leo, Virgo) to discuss

• Our experience

• Lessons learned

• IoT Infrastructure scaling with Docker and Kubernetes

• Resin.io details

Example of measured data - temperature

Example of measured data - relative humidity

Example of measured data - CO2

Limit

Conclusion of measurements

MeasuredClassroom

CO2 [ppm] Temperature [°C] Relative Humidity [%]

Min Max Min Max Min Max

Room 1 375 1 974 20,9 30,4 15 39

Room 2 407 3 364 21,6 26,0 20 46

Room 3 402 2 334 19,8 30,0 14 35

Room 4 323 3 653 19,6 26,2 17 50

Room 5 373 2 396 23,8 31,1 14 37

Room 6 417 4 757 15,5 25,9 18 64

Room 7 403 2 461 18,3 26,5 14 43

Room 8 394 2 500 11,1 26,5 18 50

Room 9 409 2 854 24,0 27,6 18 39

Room 10 385 1 860 21,1 27,7 14 37

> 47% more than 1 000 ppm

> 26 °Cmore than 27%

of the time

< 30%more than 74%

of the time

Team member Project role

www.ssps.cz School environment

www.iqrfalliance.org Project management

www.o2.cz System integration, data collection

www.microrisc.cz IQRF transceivers

www.protronix.czIndoor air quality measurement and evaluation

www.camea.czOutdoor air quality measurement and evaluation

www.zivotni-prostredi.cz Outdoor noise measurement and evaluation

Project team

Thank you