Office building. Energy management
of the engineering systems

Task: reduction of energy consumption while maintaining indoor environmental quality.

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Object: a floor of a 7-floor building with a local ventilation system with after-heating of cold air, autonomous air quality control and autonomous energy accounting.

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Implementation:
- Process input data on real spatial configuration of the working object (physical model) and installed engineering equipment (functional model)  based on blueprints.
- Сreation a structural model of the facility in the forms: of engineering systems, building structures.
- Caring out the binding of the documentation to the digital model
- Setting up Air Quality sensors, Energy Meters, Gateways and Wi-Fi relays

Technologies: 5D BIM Autodesk Revit, MathWorks (MATLAB & Simulink)

Results:
- The digitization of the building/premises and the engineering systems was carried out
- The mathematical model BEM has been shown to be highly efficient for various operational scenarios
- Opportunities to optimize the daily energy consumption during the winter heating period by a factor of 2.5 were identified

This case study we have presented 3D modelling of the energy consumption of one floor of a building. Each simulation will reflect a 24-hour energy cycle.

- In the first simulation, we will show the variation of the utility systems' CO2 concentration, electrical consumption, and heat consumption at maximum design load.  

- In the second simulation we will show the change in heat consumption as a result of installing sensors to regulate the ventilation system by CO2 concentration.

- In the third simulation we will replace the lighting elements with energy-efficient ones, install occupancy sensors and reduce the capacity of the ventilation system by a factor of 2.

The outdoor CO2 concentration level is assumed to be 450 ppm, and the CO2 concentration level at which the ventilation system is switched on is supposed to be 600 ppm. The outdoor temperature is assumed to be for a February day with a range of [-5: +5] degrees Celsius. The red line on the graph represents the current average room load on the electrical system of the floor of the building. The green line on the graph represents the current average room load on the ventilation heat supply system of the floor of the building.

As a result, we get energy savings of 2.5 times without compromising the microclimate of the premises.