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Energy efficiency through HVAC systems



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“New hotels which are at the construction stage can opt for demand controlled ventilation (DCV), a product that conducts real-time measurements of the amount of carbon dioxide in the air at a given time and increases the amount of freshly ventilated air brought into a building based on the that measurement. This technique not only increases guest comfort but also reduces utility costs,” said Krishan Sachdev, director marketing and strategy, Carrier Airconditioning & Refrigeration Ltd. The company also offers energy efficient, non-ozone depleting Evergreen 23XRV variable speed water-cooled screw chiller which gives flexibility to reduce the load efficiency when facilities are in limited use.

At a time when hoteliers are looking at cutting their cost, asking them to upgrade to higher technology may not sound feasible to many as this will add to their cost. Sachdev says there are projects such as Clinton Climate Initiative (CCI) with whom Carrier has signed a memorandum of understanding to provide private building owners with access to financing terms to retrofit existing buildings with more energy-efficient systems in C-40 cities. 

The C-40 is a group of the world’s largest cities who are committed to tackling climate change. India’s Delhi and Mumbai are part of that group.

Trane’s humidity control systems help providing ample ventilation with filtered and conditioned outdoor air.  It monitors and controls the amount of moisture content in the air as per the requirement of the hotel building. “The biggest challenge faced by hotel owners is to maintain a high and consistent level of comfort which is critical in the lodging industry. Energy efficiency is the second-highest challenge that hoteliers face. However, energy efficiency should never be obtained at the price of guest discomfort,” said Pankaj Gupta, energy and environment leader, Trane India Pvt. Ltd.

Gupta shares an example of ITC Kakatiya hotel at Hyderabad. The property wanted to set an example as a leader in energy efficiency and environmental responsibility by focusing on implementing energy efficiency measures that included selecting the right HVAC systems and services.

“By retrofitting their old system with energy efficient systems from Trane, the hotel achieved improved HVAC system reliability and reduced energy consumption by more than 15% and is saving more than US $50,000 in reduced energy costs per annum.”

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excellent!

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Johnson Controls’ heat pump is another energy efficient product which is a reverse cycle chiller that meets both heating and cooling needs of a hotel. “Use of heat pumps consumes 1/3rd the energy consumed by the boiler for heating applications,” said Pramoda Karkal,  vice president and managing director, Building Efficiency, Johnson Controls.

“Most hoteliers find energy efficiency as an important subject and therefore when we present them with technologies such as variable speed drives (VSD), centrifugal chillers supported by energy modelling data, there is ready acceptance,” he added.

Treated Fresh Air Units (TFA) incorporating energy recovery devices provide many answers to the challenges faced by the designers today, said Aeron of DRI.

“They not only meet the need of energy efficiencies but also the better IAQ. TFAs are typically used for treating or preconditioning ventilation air i.e. fresh air as well as achieving acceptable IAQ, humidity control, energy efficiency, and in the process reducing the building envelope.”

Building Automation System and HVAC software are also widely used by hoteliers as they play crucial role in gaining optimum efficiency out of the HVAC system. “The Building Automation System helps us doing scheduling and temperature control of rooms according to our need. It has contributed significantly to our energy saving,” said Kumavat. 

Indian hoteliers are becoming conscience of their environmental footprint and choosing equipments and systems that offer superior energy efficiency. Gupta says hoteliers, today, are willing to make an additional investment in to energy-efficient systems.  A ‘green movement’ has emerged within the hospitality industry. According to Karkal, Indian hotelier is extremely intelligent and always willing to invest money provided the return on investment is high.

Hoteliers investing in energy efficient systems will not only project a “Green” image but also receive payback on their investments in a couple of years.




Readers' Comments


shiromani sharma (Jul 8, 2010)
delhi, India

enurgy efficiant through HVAC
excellent!


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