Net Zero Energy Building (NZEB)

The ORBPL NZEB evolved as a multi-act play:

Act One: Deployment of a renewable energy generator in the form of Solar PV system. The SunCarrier SC 260 was chosen since it was one of the largest sun-tracking solar PV systems worldwide, with a designed energy yield that was 35-40% higher than that of similarly rated static systems. Its large format, and its ability to track the sun, has made it a beacon for the eco-inquisitive and eco-concious from all walks of life. It now acts as a great motivator for those desirous of adopting sustainable energy policies for their own residential or commercial operations.

Act Two: Incorporate demand-side energy efficiencies. The ORBPL NZEB design incorporated day-lighting for high utilization of natural lighting; LED lighting and occupancy monitoring sensors. The air conditioning system chosen was one with ozone friendly refrigerant and carbon dioxide monitoring sensor system and low noise inverters. Water harvesting system, controlled water discharge toilets, and sewage treatment with zero discharge ensured efficient usage of water. The furniture chosen, too, was 95% recyclable.

Act Three: Integration of a large capacity energy storage system, the Cellcube FB 10-100. In addition to its ability to store upto 100 kWh of energy per unit, it also functions as an effective energy management system. Excess energy produced during the day by the SC 260 is stored in the Cellcube, which in turn supplies energy during the night hours, and during monsson days when the sun does not shine.

Based upon the sizing for the ORBPL energy plan, the system was configured with 2 units of SunCarrier SC 260, with an overall rating of 67 kWp, for a planned yield of over 130,000 kWh per annum. 3 units of Cellcube FB 10-100, each with a maximum power rating of 15 kW, and a storage capacity of 100 kWh, were configured. 1 SMA Multi-cluster box completed the configuration.

The system described above has a design life of 25 years. The SunCarrier SC 260 require minimal maintenance in terms of periodic cleaning the dust off the PV module surfaces. The PLC controls and monitoring systems incorporated both in the SunCarrier SC 260 and the Cellcube FB 10-100 allow remote monitoring of critical performance parameters and take the rarely required preventive actions to ensure smooth functioning of the system. The systems are highly eco-friendly in that they are over 95% recyclable, emit no harmful gases or effluents, and there are no heavy metals to dispose off.

Act Four:

The ORBPL Net Zero Energy Building
The ORBPL Net Zero Energy Building (NZEB), located in the central part of India, in the city of Bhopal, the capital of Madhya Pradesh, is an example of how organisations that can, go beyond adopting the best in energy conservation technologies, and augment the energy supply by implementing 'green' energy systems that leverage nature's abundance of solar energy.

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