–Bengladesh Bhavan

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High volume air conditioning
challenge met by SET FREE

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The Bangladesh Bhavan center celebrates the cultural
links between India and Bangladesh. At over 44,000sq.ft.
the prestigious two storey building includes a 450 capacity
auditorium, museum, library, research center, two seminar
halls and a cafeteria.
SET FREE Kyosho Series was chosen to cool down the large air
volumes housed in the building. Even cool air distribution and
fresh air intake units, combined with low noise level, create an
ideal atmosphere for an enlightening visit.

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Key outcomes
✓ Full comfort even at high temperature – up to 450C
that can be experienced in summer
✓ Quiet operation ideal for conference and library atmospheres
✓ Fresh air circulation maintaining a healthy environment
✓ A consistent indoor temperature of 220C achieved for the
building inauguration, in the presence of India’s Prime Minister
Narendra Modi and Bangladesh’s Prime Minister Sheikh Hasina

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Issues to be addressed
The 450 seat auditorium room, with high ceiling (30ft/9.1m), was particularly
challenging in terms of a high airflow and humidity control.
In addition, the air conditioning system had to suit the needs of the other rooms in
the building, including a 6,000 book library, two seminar halls, a cafeteria and a glass
roof hall.
In this region of India, high ambient temperature can be a big challenge, requiring
superior air conditioning performance and reliability.

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Key stakeholder requirements
• The Visva Bharti University — required low noise level air conditioning.
The acoustic quality is critical for this auditorium where conferences and
speeches are delivered.
• The architectural consultant ACME and HVAC consultant Mr Manoj Chakraborty —
stressed the requirement of the air distribution system to prevent hot air pockets
within the auditorium. Supporting product data was supplied to accurately size the
VRF system.

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Our solution
The SET FREE Kyosho Series by Hitachi Cooling & Heating was ideal to meet
the cooling demands of this project.
• 300HP total capacity – the building includes a glass-roofed central hall
bathed in sunlight.
• The auditorium required a large air flow, the ducted indoor units produced an air flow
velocity of 3,400CFM (Cubic Feet per Meter), one of the highest in the market. This
solution prevented excessive overcooling whilst meeting the required air flow.
• For effective ventilation, the system was combined with four Hitachi fresh air indoor
units. With 3,540CFM air flow rate, they offer the highest capacity in the market.
• Hitachi unique energy saving technologies employed in the SET FREE Kyosho Series
were a key consideration in the bidding process.
- 27 step speed control: continuous precise adjustment of the air conditioning
operation to meet indoor demand reduces the power input.
- 2 stage oil separator: less oil is transmitted to the oil separator minimizing the
quantity of oil in the second stage, resulting in a 3.45% increase in energy efficiency.

GENERAL INFORMATION

Customer
Bangladesh Bhavan at Visva-Bharati university

Location
Santiniketan, West Bengal, India

Project
Construction of Cultural Building(44,261sq.ft/4,112m2)

Date of installation
2018

SYSTEM DESCRIPTION
Outdoor Units
SET FREE Kyosho series Heat Pump type | 400MF/TR
• 6 units
(18HP)
• 4 units
(48HP)

Indoor Units
In-The-Ceiling (High Air Quantity)
• 6 units
(18HP)
3,400CFM
• 8 units
(3HP)
1,000CFM

4-Way Cassette
• 4 units
(2HP)

Wall-mounted
• 4 units
(2HP)

All Fresh Air Indoor Unit
• 4 units
(20HP)
3,540CFM

Individual Remote Controllers
PC-AR
• 20 units
PC-LH3B
• 32 units