D8 Giang Vo St., Ba Dinh District
|Type of Building:||Hotel|
|New / Refurbished:||Refurbished|
|Year of construction:||1996|
|Gross Floor Area:||10770 sq.m|
Ha Noi hotel, which comprises two blocks of 11 and 18 floors, has adopted significant energy-saving measures to make air conditioning, lighting, and boiler more efficient. It won the third prize in the Energy Efficient Building Contest held by the Ministry of Industry and Trade in 2010.
Third Party Verified: No
Source of Information: Ha Noi Hotel
Methods of data collection: interviews with manager and data collection via email.
The window to wall ratio (WWR) is 33%. According to the Energy Efficient Building Code – Building Envelope Guideline (EEBC), the WWR must be 30-50% (EEBC 2013).
All windows are double glazed, providing insulation that helps reduce the thermal load on AC systems.
Light yellow-coloured walls provide high solar reflection capacity, helping reduce the thermal inertia of the building.
The Over Thermal Transfer Value (OTTV) of the walls of the 18-storey block was calculated by ECC Ha Noi at 42.59 W/m2, or 29% less than the EEBC 2013 requirement (of 60W/m2).
The Over Thermal Transfer Value (OTTV) of the walls of the 11-storey block was calculated by ECC Ha Noi at 43.82 W/m2, or 27% below the EEBC 2013 requirement (of 60W/m2).
Roof – Terrace
The roof of the office podium has six layers made up of:
+ Waterproofing membrane (5cm)
+ Concrete slab (20cm)
+Ceiling void (45cm)
+ Gypsum Ceiling
The Over Thermal Transfer Value (OTTV) of the roof of the 17-storey block was calculated by ECC Ha Noi at 15.22 W/m2, or 39% below the EEBC 2013 requirement (of 25W/m2).
The Over Thermal Transfer Value (OTTV) of the roof of the 11-storey block is calculated by ECC Ha Noi at 14.59 W/m2, or 41% below the EEBC 2013 requirement (of 25W/m2).
Centralised air conditioning
Replacement of two old water-cooled chillers (COP=3.5) with a capacity of 300 kW by new ones (COP=4.5) with a capacity of 150 kW
Replacement of inefficient lamps
Replacement of 2500 (50 W) incandescent lamps with (7W) compact fluorescent lamps in bathrooms and public areas, saving 160,000 kWh/year.
Replacement of 600 (36 W) fluorescent lamps with (18W) LED lamps in offices and guest rooms, saving 31,500 kWh/year.
Lighting Power Density (LPD) in public areas is 4.4 W/m2, or 60% less than the EEBC 2013 requirement.
Replacement of a diesel boiler with an efficiency rate of 86% with a diesel boiler that has a heat recovery device with an efficiency rate of 90%.
Commitment to energy efficiency policies
The building manager has set a target of reducing energy consumption by 2% annually between 2013 and 2018.
The Engineering Department has 20 members and performs 5,000 hours of maintenance work a year to ensure the hotel’s continuous operation and a high level of customer service.
Organisation of training courses for the Engineering Department annually to efficiently operate the air-conditioning, water pumping, and other systems.