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NTPC Kudgi Township
Kudgi, Karnataka

Summary

Location Kudgi, Karnataka
Coordinates 16°31’44.2″N 75°50’49.5″E
Occupancy Type Township
Typology Existing
Climate Type Warm and Humid
Project Area 169 Acres
Date of Completion 2017
Grid Connectivity Grid-Connected
EPI 21 kWh/m2/yr
MEP Design Guidance Eltek Engineering Services
Contractor Unity Infraproject Limited

National Thermal Power Corporation (NTPC) is India’s largest power utility, generating electricity through thermal, hydro, solar, and wind energy. It operates multiple power plants and manages several well-planned residential townships across India. Among them, NTPC’s township, located in Kudgi, Karnataka, has made a landmark achievement by being the first township to be awarded  IGBC’s Net Zero Energy certification. Spanning 169 acres, this township encompasses residential, institutional, healthcare, assembly, and retail buildings. It meets 100% of its annual energy demand of 2,562,930 kWh through renewable energy generated within its premises. The surplus energy generated, is fed back to plant station auxiliaries.

NTPC Kudgi Township
Kudgi, Karnataka

Orientation

Natural ventilation plays a crucial role in warm-humid climates, as it  enhances indoor air quality and reduces reliance on mechanical cooling systems for delivering comfort. The residential blocks are strategically oriented, such that the windows capture prevailing winds from the west and northwest. The windows are designed to maximize airflow and promote cross-ventilation. Ceiling fans further enhance ventilation by evenly distributing air, improving comfort, and reducing the need for mechanical cooling.

Building Envelope

The building envelope has been designed to enhance energy efficiency and reduce cooling loads. Insulated walls and roofs help minimize thermal conductivity, keeping interiors cooler during peak summer months. Additionally, reflective paint and materials with low solar heat gain coefficients are used on the façade to mitigate heat absorption and improve energy performance.

Fenestration

Windows on the south and west facades have overhangs thereby reducing direct solar exposure, glare, and overheating. These overhangs block harsh sunlight during peak hours, especially in summer, and help maintain cooler indoor temperatures and enhance occupant comfort. They reduce direct solar radiation on the windows by approximately 35-40%. The size and placement of windows are based on the building’s orientation. On the west facade, which receives the most intense solar exposure, windows are smaller in size to minimize heat gain. In contrast, windows on the north facade are larger in size, considering that the solar intensity is lower, thereby maximizing daylight penetration.

Cool Roofs

Roofs and walls are treated with light-coloured paints to minimize solar heat absorption. These coatings help reduce solar heat gain by reflecting a significant portion of the sunlight, rather than allowing it to be absorbed. The use of light-coloured paints on the walls lowers surface temperatures by 1.5 to 2°C during peak summer months, resulting in a cooler indoor environment.

NTPC Kudgi Township
Kudgi, Karnataka

Air Conditioning

100% of the air-conditioners  installed in the township have a minimum BEE 3-Star rating.

Lighting

A lighting power density (LPD) of less than 0.6 W/ft² (6.45 W/m²) has been achieved across all buildings within the township. Energy-efficient LED lighting systems are installed, reducing energy consumption while ensuring adequate illumination.

NTPC Kudgi Township
Kudgi, Karnataka

Renewable Energy Integration

Renewable energy generation is the cornerstone of this Net Zero Energy Township. The township generates 8,685,020 kWh of renewable energy annually, which far exceeds its annual energy requirement of 2,562,930 kWh. The energy generation systems include:

  • Rooftop Solar Plant: A 393.6 kWp rooftop solar PV system generates 566,930 kWh of energy annually.
  • Solar-Wind Hybrid System: A hybrid system, comprising 1,375 kWp of solar PV and 2,000 kWp of wind turbines, produces 8,118,090 kWh of energy annually.

Energy Surplus Management

The project not only meets its energy demands but also generates a surplus of 6,122,090 kWh, which is directed to the plant station auxiliaries. This strategy ensures efficient utilization of excess renewable energy, thereby supporting the operational energy requirements of the power plant.

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