Office Building
for TSREDCO and TSSPDCL, Hyderabad
Lighting
In the building, artificial lighting is not needed during daylight hours, except on overcast days. The lighting system is designed to provide an even illumination at 100-150 LUX for general use. If more light is needed, occupants can also use task lighting.. The building will adhere to the lighting control guidelines specified in ECBC 2017. It will feature the following:
- Efficient LED fixtures to achieve a Lighting Power Density of 2.47 W/m2, surpassing Super ECBC requirements by almost 50%.
- Lamps with an efficacy of more than 100 Lumens per Watt.
- Smart lighting systems, specifically DALI (Digital Addressable Lighting Interface), enabling individual control of each light fixture for increased flexibility, energy efficiency, and functionality compared to traditional lighting.
- Occupancy sensors.
- Daylight sensors in all naturally lit areas.
- Scheduled controls for internal and external lighting.
Residual Cooling Demand Strategy
In the building, fresh air will be supplied from central Air Handling Units (AHUs) located on the roof, with one AHU for the East wing and another for the West wing. These AHUs use a combination of heat recovery and desiccant wheels at the exhaust and intake. The fresh air can also be further cooled using a chilled water coil, and the desiccant wheel is recharged by a heat pump connected to the return pipe of the radiant cooling system. Additionally, a chilled water spray in the exhaust air path improves the heat recovery wheel’s efficiency.
Sensible cooling will be achieved by using cool water with a temperature near the Wet Bulb Temperature (WBT), produced by a highly efficient cooling tower. This cool water cools an insulated water store, which then feeds the radiant cooling circuits.
To circulate fresh air in the office spaces, Floor AHUs are used with a low-pressure displacement ventilation system.
The building utilizes the following heat transfer devices:
- Radiant Cooling.
- Indirect Evaporative Cooling for fresh air.
- Heat Recovery and Desiccant Wheels.
- Heat Pump for Desiccant Regeneration, utilizing heat from the radiant return circuit.
- Low-pressure Displacement Fresh Air Ventilation.
Strategy for Further Reducing Irrigation Water DemandÂ
Highly efficient irrigation equipment like micro drips and micro sprinklers will be employed. Additionally, water-saving methods such as pot irrigation will be integrated.Collectively, these techniques and focus on native vegetation will reduce the water demand for landscaping to an average of 2.5 liters per square meter per day.
Bio STP – Reed-bed system
A reed bed Bio Sewage Treatment Plant (STP) is being proposed for this project for several reasons. Its energy consumption is significantly lower, about 80% less than a mechanical STP. The only energy required is for pumping water to the reed bed and from the treated water tank to the roof.
Reed bed STP is a natural and low-maintenance solution, with regular attention from a gardener needed to care for the plants. It can be seamlessly integrated into the landscape since the surface of the reed bed is covered with plants. This type of STP provides secondary treatment for wastewater and can directly contribute to landscaping. Approximately 70% of the total wastewater will be available for various uses after being treated.
Building Management System
The building will feature an advanced Building Management System (BMS) to optimize its efficiency, monitoring and controlling various functions, including lighting, HVAC, security, and energy management. The Building Automation System (BAS) includes Network Server/Controllers, Digital Control Units, Administration and Programming Workstations, and Web-based Operator Workstations. It provides control, alarm detection, scheduling, and reporting. The system can offer web-based automated predictive energy optimization (APEO) and support local utility Demand Response (DR) programs. It uses communication protocols like BACnet, LonTalk™, or Modbus for seamless operation.