Department of Building Engineering and Management, SPA New Delhi

Image description
Image description

Visit to Bayer office - Leed Platinum rated Building



Introduction

 

The term “green” refers to environmentally friendly practices from building design to the landscaping choices. It also encompasses energy use, water use, and storm water and wastewater reuse. A green building may cost more up front but, in the long run, will save money through lower operating costs over the life of the building.

 

To realize the concept of green building, these days the building projects are designed and executed with an integrated project delivery approach, wherein the project teams discuss and brainstorm ideas to achieve the set target.

 

As the world pursues higher levels of sustainability, Eco-Commercial Building’s Net Positive Energy (NPE) building status is considered as a milestone in India’s sustainability goals. The “Eco-Commercial Building or ECB” located in Noida was conceived with the ‘Integrated project delivery approach’ and was launched in 2007. ECB is a LEED Platinum certified project and has achieved highest points under LEED India for New Construction v2.2 (64 out of 69 credits) thus achieving the status of one of the “greenest in world”.

 

 

Site Visit

 

The batch of M.BEM-2014 was taken for a visit to the Bayer ECB by Dr. P.C.Jain where they were introduced to the features of this green building and an overview of its making.

 

Bayer is a multi-dimensional organization which has major three core working sectors: Crop Science, Material Science and Health Care. True to the motive of the company: “Science for better life” Bayer has incorporated the green building concept in their office building in the Greater Noida with a major contribution of Spectral Services as their sustainability consultants headed by Dr. P.C. Jain.

 

The building tour was guided by Dr.Ram Sai Yelamanchili (owner of the building) along with other experts from Spectral Services to explain the technicalities of sustainable design & construction and the challenges faced in managing  the interface between experts from varied backgrounds to make NPE building a reality.

 

Following design peculiarities were observed during the visit to the ECB, Noida:

  • Orientation of the building to harness daylight from the façade facing north direction

  • Actual on-site energy generation at ECB is 72,023 kWh which is in addition of 8113 kWh over the 63,910 kWh consumed annually within the building.

  • Use of chilled beams to provide cooling thereby cutting down the operational cost due to savings in AHU fan energy and simultaneous reduction in chiller energy as beams carry chilled water at 15degC as against conventional practice of 7degC.

  • Dedicated Outdoor Air System (DOAS) and Demand Control Ventilation (DCV): DOAS caters to the entire latent loads in the building. Dry outdoor ventilation air is supplied through an externally mounted unit that dehumidifies the air before supplying to occupied space. This dry outdoor air acts as primary air to the chilled beams. DOAS has a heat recovery section as well, that provides a way of recovering waste energy from building exhaust. The energy recovery wheel enabled reduction of the ventilation AC load by 80%, thereby minimizing operating energy as well as the size of air-conditioning equipment.

  • Renewable energy through Solar PV: The project uses crystalline silicon grid connected solar system with the capacity of 57kWp.

  • 87% of total regularly occupied spaces in the building have a minimum daylight factor of 2%. Benefits from day lighting are further maximized by using occupancy sensors in normally un-occupied arrears like stores, toilets etc. to minimize misuse.

  • Combination of T5 linear fluorescent and Compact Fluorescent Lamps considered as excellent choices for ECB.

  • ECB Envelope Design: Walls: 75 mm thick polyurethane foam sandwiched externally + 150mm thick AAC block walls. Roof: 75 mm thick polyurethane foam laid over-deck integrated with waterproofing and additional 50mm thick mineral wool. Glazing: High Performance Glass.

  • Also, to encourage such green building practices, Bayer has installed a program to upload live energy data on the intranet for the process to be transparent and appreciated by the user and observer.

 


About Author

The above post has been contributed by Ar. Deepali Mishra (deepalimish@gmail.com) & Er. Rohit Singh (write2jrohit@gmail.com) of second year who were part of the group that visited Bayer's LEED Platinum rated building.

Image description
Image description