Energy conservation study at Hotel Soaltee Crowne Plaza ...

Energy conservation study at Hotel Soaltee Crowne Plaza, Kathmandu
[Sponsor: Soaltee Hotel Limited]
Executive summary
The Soaltee group of Nepal plans to implement effective energy management practices in
all its properties. They have already realized the fact that only good operating practices
and maintenance schedules alone can not reduce the energy wastage in operating energy
systems since energy efficiency was never considered as a design parameter during
planning and designing stages of building and building systems. TERI, New Delhi, has
carried out a study in the form of energy audit and it is considered as a first step towards
developing comprehensive energy management programme to optimize energy use in
energy consuming systems at Soaltee Crowne Plaza, Kathmandu.
The Soaltee Crowne Plaza, Kathmandu is one of the leading hotels of Nepal. With five star
deluxe grading it provides a very high standard of hotel services with approximately 300
guestrooms and luxury and executive suites, five restaurants, three function halls, bar,
business centre, swimming pool and a shopping arcade near lobby. To support these
guest services, the hotel management is responsible for a laundry, one main kitchen and
four other kitchens to serve to the restaurants and room service. The hotel is centrally air
conditioned and equipped with power generating facility to protect services in event of
power failure.
Major findings of the study are given below.
� Existing connected load at Soaltee Crowne Plaza, Kathmandu, is approximately
1980 kW (70.8 W/m2 [watt per square metre]) as against the sanctioned load of
1500 kVA (kilovolt-Ampere).
� The maximum peak electrical demand recorded is approximately 1469 kVA,
which is less than the sanctioned demand.
� Existing lighting load is 435 kW or 15.9 W/m 2 .
� HVAC (Heating, Ventilation and Air-conditioning) load is around 950 kW or 33.5
W/m2 .
The Energy and Resources Institute

Executive summary
� Total energy consumption in common unit in hotel is approximately 12 357 410
kWh (kilowatt-hour) or 33 856 kWh/day.
� Electricity accounts for 47%, kerosene for 46%, and LPG (liquefied petroleum
gas) shares seven per cent of the total energy consumption.
� Approximately 1 650 000 kWh (4520 kWh/day) energy is consumed in lighting
systems.
� Annual consumption in an air conditioning system is around 1 024 651 kWh or
3730 kWh/day.
� The total annual energy cost is approximately 49.3 million rupees (135 000
rupees/day).
� Electricity accounts for 77%, kerosene for 19%, LPG for two per cent and HSD
(high speed diesel) for two per cent of the total energy cost.
� EUI (energy utilization index), defined as total energy consumed divided by total
built-up area (kWh/m2 ) at Soaltee Crowne Plaza, Kathmandu, is 434. EUI is used
to compare the energy efficiency of two similar types of buildings. The other way
to represent EUI is kWh/room/day and this is found to be 113 at Soaltee.
� Replacement of underloaded motors with appropriately sized motors could save
56 720 kWh or 404 700 rupees annually. This would require an initial investment
of 341 120 rupees (without including the salvage value of the replaced motors).
� By proper loading of transformers, there exists a potential to save 83 000 rupees
annually without expending any money.
� Replacement of V belt with flat belts in 10 motors can yield a saving of 70 900
rupees annually at an initial investment of 37 800 rupees.
� By improving the lighting system efficiency with the use of more efficient lamps,
luminaries, and ballasts, there exists a potential to save 588 400 kWh in a year or
4 177 650 rupees. Retrofitting would require an initial investment of 3 427 800
rupees, with an average payback period of just 10 months.
The Energy and Resources Institute

Executive summary
� By correcting the chilled water and condenser water flows and replacing cooling
towers so that they can operate at its rated efficiency, there exists a potential to
save around 259 201 kWh/year or 1 840 300 rupees per year. The initial
investment required would be approximately one million rupees, with an average
payback period of less than seven months.
� Installation of variable speed drives on various kitchen and laundry exhaust and
fresh air fans and schedule their operations at different frequency at different
time would save 67 424 kWh or 478 710 rupees. Retrofitting would require an
initial investment of 409 940 rupees.
� Optimization of excess air, flue gas temperature, H2 (hydrogen), moisture in fuel,
and moisture in air to improve thermal efficiency of steam boilers and reducing
blowdown frequency would save 10 kL (kilolitres) of kerosene or 122 000 rupees
per year.
� Energy conservation study at Soaltee Crowne Plaza, Kathmandu, observes that
there exists a saving potential of 993 420 kWh of electricity and 10 kL of kerosene
or overall 8.64% of the present total energy consumption.
� With implementation of recommended energy conservation measures, a saving of
7 175 240 rupees or 14.6% of the present total energy cost could be possible
annually. Implementation of various recommended measures would require an
initial investment of 5 216 720 rupees.
The Energy and Resources Institute