Know-How Archive

Added 1 December 2009

Issue 49 - Solar power

Issue 49 - Solar power

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Why should you consider solar technology?

The hotel sector is energy-intensive. Using cleaner and cheaper energy sources will help to reduce operational costs and increase competitiveness and sustainability.

 

In the UK, the hospitality sector spends over £1bn every year on energy. It is responsible for producing 3.5m tonnes of carbon emissions per year, but if the hotel industry reduced its energy bill by 20%, it could save a combined £200m, according to the Carbon Trust, the UK’s leading authority on carbon reduction.

 

According to the US federal government’s Energy Star programme, US hotels spend an average of $2,196 per room each year on energy. Not only is that a significant expenditure, it requires the burning of huge amounts of fossil fuels.

 

An option for many businesses is to source their own energy and in most cases solar power is the only realistic alternative.

 

A study by Sage Blossom Consulting of 4,400 hotels in the US found 12% used some form of alternative energy. And that figure looks set to grow as hoteliers look for more environmentally friendly and cheaper energy sources, and more incentives are offered for the implementation of renewable energy, including solar technology.

 

One initiative is the European Union (EU) co-funded Hotel Energy Solutions scheme, coordinated with the UN World Tourism Organization, United Nations Environment Program, International Hotel & Restaurant Association, European Renewable Energy Council and the French Environment and Energy Management Agency. The scheme has been set up to help small- and medium-sized hotels in the EU to increase energy efficiency and use renewable technologies.

 

The United Nations climate change conference in Copenhagen in December could also be good news for renewable energy. If targets for reducing carbon emissions are agreed, governments may provide more financial help to businesses to install solar technology.

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Case Study

Starwood - St Regis Aspen Resort

 

The St Regis Aspen Resort is making major strides in decreasing its carbon footprint with completion of a solar project that could reduce the hotel’s natural gas usage seasonally by as much as 30%.

 

One of the first hotels in America to use e-tube solar technology, its solar contractor, Altech Solar, began installing solar e-tubes in December 2008. A year later, it has mounted over 1,300 tubes on the roof, which will utilise the sun as a natural heat source.

 

Using the sun’s energy, solar e-tubes—also known as heat pipes—are capable of heating water in the vacuum tube arrays to temperatures above 400°F. The heated water circulates through the top of the tubes, where it is pumped into storage tanks and dispersion loops.

 

This system is tied into the resort’s main domestic water loop where it provides heat for domestic sinks and showers, the resort’s Remède spa and the swimming pool and whirlpools.

 

A sophisticated digital system regulates pumps, valves and water quantity to maintain the desired water temperature. Solar-heated water supplements and takes the place of natural, gas-heated water until the temperatures in those tanks drop below a set minimum temperature, for example, after the sun goes down or dense cloud cover appears. At that point, the system seamlessly reverts to heating the building’s water with natural gas, until the cycle starts the next day.

 

"The St Regis Aspen and our parent company, Starwood Hotels & Resorts Worldwide, made a large capital investment in this project as part of our green initiatives," says St Regis Aspen Resort general manager Senih Geray. "We are committed to significantly reducing the energy used by the hotel, because we believe in working toward a more sustainable and ecologically sound future."

www.stregisaspen.com

See more case studies

Featured Know-How Article

Issue 50 - Water management and conservation

18th February 2010 | 0 Comments

 

Why the need to conserve water?

 

Most water (97%) is in the oceans, which cover 71% of the Earth's surface. Three per cent is freshwater, two-thirds of which is tied up as ice in glaciers and at the poles. This leaves approximately 1% as freshwater in rivers, lakes, the atmosphere and in groundwater.

 

However, with demand rising rapidly due to a growing global population with expectations of higher living standards and resource-intensive farming, that 1% is under threat. Climate change is adding to the...

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