Modernising or planning a new hotel? Our Energy efficiency tips for owners

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How can you spend less on heating and hot water in your hotel? Use this guide to find energy-efficient ways of getting your hot water, and heating in a more economical way.

Hotel facilities are a very specific group of buildings when it comes to demand for power, hot water preparation and heating. First of all, it varies throughout the year and the extent to which it will be used depends on occupancy rates. In fact, this is a function of many variables. Hotel owners often claim that in this sector it is hard to predict anything whatsoever when it comes to answering the question; will the coming season be profitable? It is quite a risky and costly business, but when well managed you can count on profits. It is therefore very important to start from the basics, namely the main costs to be reckoned with when running a hotel, which are heating and hot water consumed by both hotel guests and the hotel's restaurant. Heating and hot water preparation are one of the largest operating costs of total energy consumption. 

Spotřeba u koncového uživatele

How to ensure the highest comfort with as little financial outlay as possible?

So, the most important role here is played by a heat source. It must operate efficiently, regardless of the instantaneous load, which is highly variable in the case of hotels. It is a big challenge to ensure high comfort for guests, both when occupancy is low and during the peak season. This means that you should choose the heat source that enables you to modulate the highest possible output without significant efficiency losses. Heat adjustment in the hotel is also important, since during the warmer seasons, temperature in unoccupied rooms can be reduced to a minimum, whilst the temperature can be regulated in the other rooms.

With variable energy demand, the best solution would be a device where the output can be easily controlled, for example through burner modulation, UltraGas gas condensing boiler is such a device. It is probably the most efficient boiler available on the market, which, apart from the functionality described above, is characterized by high thermal efficiency, reaching up to 99%. It is a very important feature, since it makes it possible for the device to achieve the same heating effect while consuming less fuel, which will lead to lower operating costs. High boiler efficiency is the result of the use of the patented aluFer® heat exchanger, which removes to the maximum extent heat from flue gas, the temperature of which, at the boiler outlet, can be lower than 50°C. The use of two active low- and high-temperature returns makes condensation in the this boiler type possible even while heating hot water and DHW. The boiler is insulated with mineral wool mat in order to minimize heat losses as much as possible. Intelligent automation allows you to control the boiler, and integrated water pressure and flue gas temperature sensors ensure its safe operation. The TopTronicE controller is equipped with a clear display which allows you to set the required temperature for individual hot water circuits, as well as the temperature of hot water and operating mode.

210.140

Companies that want to have a good reputation should be equipped with ecological devices having minimum impact on the environment. Flue gas monitoring is very important - concentration of the compounds in flue gases and their temperature provides the owner with information on whether the operation of the boiler and combustion process run properly. Hoval declares CO2 content in flue gases at the level of 9-8.8%, NOx- 26-38 mg/kWh, and carbon oxides - 3-9 mg/kWh, depending on the output, which constitute very small quantities. It should be added that the lowest flue gas emission and the highest boiler efficiency are associated with the operation at low parameters of the heating medium. 

Effective and ecological solutions

Exclusive hotels also mean exclusive requirements of guests. Facilities often feature additional attractions, which must also be provided with adequate comfort. Therefore you should choose reliable solutions that have already been successfully used and bring benefits to their owners. These include, above all, reliable operation, advanced controlled automatics or effective and ecological production of thermal energy. 

Case study

An example of one of such projects is Hotel Stok located in Poland,  where modern and intelligent cascade of Hoval UltraGas (700D) boilers has been installed. The facility is composed of sleeping area for hotel guests, with 205 rooms for a total of 420 guests, which at full occupancy gives the demand for DHW of about 33600l/day. In addition, there is a recreation area consisting of 3 restaurants, 13 SPA rooms, bowling alley, swimming pool with jacuzzi as well as wellness zone and 14 conference rooms.

Hotel Stok Poland

Such an amount of attractions can generate very high facility maintenance costs, therefore the owners wanted to have the most economical and efficient possible source of heat. Thanks to integrated automatics, allowing for modulation of the burner and adjustment of the boiler output to the actual needs of the facility, Hoval UltraGas® boiler meets these requirements. This is of particular importance, since with variable demand for power, mainly for the purposes of DHW preparation, in order to operate efficiently the boiler needs to operate stably and activate rarely, but for longer periods.
 

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Author
Martin Köb
Product Manager SRS
 
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