Natural water from a well / aquafer under the hotel provides
100% free cooling for all the air conditioning without the use of heat-pumps or chillers
Quick stats:
- A 1970s office building with a Georgian façade was converted to a 150-bedroom, 4-star hotel
- The size of the building is approx. 6,000 m²
- Air conditioning is provided via free cooling from a well and without refrigerants
- There are very low CO2 emissions from the heating ventilation and air conditioning (HVAC) systems
- Waste heat from the kitchen ventilation is used to heat the building
- The kitchen canopies exhaust at low level from the building
- Because of the energy efficient design and the technologies used, the project qualified for an EXCEED grant from SEAI.
Nominated for Tourism and Hospitality Project, plus Green Project of the Year at the Irish Construction Awards 2018.
Europe’s First Sustainable Hotel
Source: The Irish Times.
Natural water from a well / aquafer under the hotel provides 100% free cooling for all the air conditioning without the use of heat-pumps or chillers.
The air conditioning system is extremely efficient and costs almost zero to run. 1kW of electricity is used to produce 10kW of cooling.
The air conditioning system does not use refrigerants, just water. It is becoming more widely known that the manufacture and disposal of refrigerants is harmful to the environment. In the Iveagh Garden Hotel, there are no refrigerants flowing throughout the building, just water
The very small amount of electricity that is required for this comparatively environmentally friendly air conditioning system is generated on site.
Free heat, a by-product of on-site electricity generation is used to heat water for the hotel.
The kitchen canopy ventilation system recovers waste heat and reduces fire risk by preventing grease building up in the ductwork.
Recovering Heat for the entire Hotel
Electricity is generated on site and all the waste heat is used by the hotel. Even though natural gas is a fossil fuel and it is used to generate the electricity for the hotel, all the heat, which is a by-product of power generation, is used by the hotel. Generally, in power stations, most of this heat is wasted.
Very efficient motors are used for all fans and thermal wheel heat recovery ventilation is used whenever possible.
The kitchen canopy ventilation system was designed to reduce the risk of fire in the ductwork and at the same time recover waste heat which is used to heat the building when required. It is possible to also use this waste heat to partially heat the water used by the hotel. By reducing odours and eliminating grease from the kitchen canopy exhaust, it has been possible to exhaust at low level from the building.
SEAI EXEED Launch at the Iveagh Garden Hotel
Minister Richard Bruton TD, John O’Sullivan SEAI and Brian McGill Iveagh Garden Hotel. AHUs Case study and Kitchen Ventilation . At the launch of the SEAI Exceed grant. Low carbon hotel is cooled without the use of refrigerants thus reducing environmental pollution and improving sustainability. The reduced use of fossil fuel, CO2 emissions means a better environment for us all. EPBD energy performance. Thank you Glenn Nunan GNCE, John Mullaney and SEAI. “Europe’s “first sustainable hotel”” Irish Times 16-2-2018
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