USE OF RENEWABLE ENERGY SOURCES FOR ENERGY GENERATION IN HOTELS IN CRETE John Vourdoubas TEI of...

USE OF RENEWABLE USE OF RENEWABLE ENERGY SOURCES FOR ENERGY SOURCES FOR ENERGY GENERATION IN ENERGY GENERATION IN

HOTELS IN CRETEHOTELS IN CRETE

John Vourdoubas John Vourdoubas TEI of CRETE TEI of CRETE

Department of Natural resources and Department of Natural resources and Environment Environment gboyrd@tee.grgboyrd@tee.gr

Renewable energy sources currently Renewable energy sources currently find various applications in hotels in find various applications in hotels in Crete , for the generation of electricity, Crete , for the generation of electricity, heating and coolingheating and coolingRenewable Energy sources which are Renewable Energy sources which are mainly used includemainly used include

Solar Energy Solar Energy Solid biomass Solid biomass Geothermal Energy Geothermal Energy

Solar Energy is extensively Solar Energy is extensively used for hot water production used for hot water production for various uses. for various uses. Flat plate collectors are mainly Flat plate collectors are mainly used, placed on the terrace of used, placed on the terrace of the hotel, either in the hotel, either in thermosiphonic or in forced thermosiphonic or in forced circulation systems. circulation systems.

FLAT PLATE COLLECTORS IN THE HOTEL FLAT PLATE COLLECTORS IN THE HOTEL CANDIA MARIS FOR HOT WATER CANDIA MARIS FOR HOT WATER

PRODUCTIONPRODUCTION

Solar Energy is also used for Solar Energy is also used for space cooling. Flat plate space cooling. Flat plate collectors are also used, and collectors are also used, and the produced hot water at 60-80 the produced hot water at 60-80 OOC, is used with absorbtion C, is used with absorbtion systems for space cooling in systems for space cooling in the hotel. the hotel.

SOLAR COOLING SYSTEM WITH SOLAR COOLING SYSTEM WITH ABSORBTION COOLING IN HOTEL ABSORBTION COOLING IN HOTEL

LENTZAKISLENTZAKIS

Solar Energy is used with PV Solar Energy is used with PV panels for electricity generation. panels for electricity generation. The generated power can be The generated power can be either sent to the grid or can either sent to the grid or can cover power needs of the hotel, cover power needs of the hotel, with or without storage in with or without storage in batteries. batteries.

PV PANELS IN THE TERRACE OF A HOTELPV PANELS IN THE TERRACE OF A HOTEL

Solid biomass is also used for Solid biomass is also used for space heating in hotels. Olive space heating in hotels. Olive kernel wood consists a cheap kernel wood consists a cheap local raw material and is local raw material and is currently used in various hotels currently used in various hotels for space heating and hot water for space heating and hot water production. production.

SOLID BIOMASS BURNER IN HOTEL ATRIONSOLID BIOMASS BURNER IN HOTEL ATRION

WOOD IS USED FOR SPACE HEATING IN WOOD IS USED FOR SPACE HEATING IN AGROTOURISM FACILITY IN MILIAAGROTOURISM FACILITY IN MILIA

Low enthalpy geothermal Low enthalpy geothermal energy can be used heating or energy can be used heating or cooling purposes with heat cooling purposes with heat pumps. Heat pumps are very pumps. Heat pumps are very efficient devices with COP 3.5-efficient devices with COP 3.5-4, and they can cover all the 4, and they can cover all the heating and cooling needs of heating and cooling needs of the hotel. the hotel.

PRINCIPLE OF GEOTHERMAL HEAT PUMPSPRINCIPLE OF GEOTHERMAL HEAT PUMPS

Passive cooling systems like Passive cooling systems like planted roofs have been also planted roofs have been also used in Cretan hotels for used in Cretan hotels for lowering the heating and cooling lowering the heating and cooling needs of them. needs of them.

PLANTED ROOF IN HOTEL EL GRECOPLANTED ROOF IN HOTEL EL GRECO

TABLE 1TABLE 1

Characteristics of RES used in Cretan hotelsCharacteristics of RES used in Cretan hotels Energy Energy source source

Energy Energy produced produced

Reliability Reliability of of

technologytechnology

Financial Financial Attractiveness Attractiveness

1. Solar1. Solar HeatHeat High High Very good Very good

2. Solar 2. Solar Cooling Cooling HighHigh Moderate Moderate

3. Solar3. Solar ElectricityElectricity HighHigh Moderate Moderate

4. Solid 4. Solid biomassbiomass

HeatHeat HighHigh Very good Very good

5.Geother-5.Geother-mal heat mal heat pumps pumps

Heat and Heat and cooling cooling

High High Moderate Moderate

6. Passive 6. Passive cooling cooling

Cooling Cooling High High Moderate Moderate

TABLE 2TABLE 2AVAILABILITY OF FINANCIAL TOOLS FOR AVAILABILITY OF FINANCIAL TOOLS FOR

RES INVESTMENTS IN CRETAN HOTELSRES INVESTMENTS IN CRETAN HOTELS

Financial toolFinancial tool

Own capitalOwn capital YES YES

Bank loan Bank loan YESYES

State capital State capital subsidies subsidies

YESYES

Third party financing Third party financing NONO

Feed-in tariffsFeed-in tariffs YES YES

The possibility of recycling the fried The possibility of recycling the fried vegetable oils from the hotel vegetable oils from the hotel restaurants exists in Crete to day. restaurants exists in Crete to day. There are various companies in There are various companies in Crete which pick up the fried oils Crete which pick up the fried oils from the restaurants and send them from the restaurants and send them in factories in continental Greece, in factories in continental Greece, for processing them and producing for processing them and producing biodiesel biodiesel

FRIED VEGETABLE OILS FROM HOTEL FRIED VEGETABLE OILS FROM HOTEL RESTAURANTS CAN BE USED FOR RESTAURANTS CAN BE USED FOR

BIODIESEL PRODUCTIONBIODIESEL PRODUCTION

- The energy cost represents the 3-9% of the running cost - The energy cost represents the 3-9% of the running cost in hotels.in hotels.-The average energy consumption in hotels in Greece is -The average energy consumption in hotels in Greece is 278 KWH/M2 year278 KWH/M2 year- The energy consumption in a hotel in various sectors is- The energy consumption in a hotel in various sectors isa) Space heating 22%a) Space heating 22%b) Space cooling 15%b) Space cooling 15%c) Hot water production 36%c) Hot water production 36%d) Lighting 6%d) Lighting 6%e) Kitchen-Laundry 9%e) Kitchen-Laundry 9%f) Other 12%f) Other 12%

TOTAL 100%TOTAL 100%

The use of RES in hotels in The use of RES in hotels in Crete , will lower the COCrete , will lower the CO22

emissions from them. It is emissions from them. It is foreseen that at least 20% of foreseen that at least 20% of the energy consumed currently the energy consumed currently in Cretan hotels and produced in Cretan hotels and produced by fossil fuels can be generated by fossil fuels can be generated from RES. from RES.

The increase of use of RES in The increase of use of RES in hotels in Crete will:hotels in Crete will:

Increase the capital investments in sustainable energy Increase the capital investments in sustainable energy technologies.technologies.

Create new jobs , since many of those systems can be Create new jobs , since many of those systems can be manufactured, installed and maintained locally. manufactured, installed and maintained locally.

Decrease the use of oil and electricity generated by oil. Decrease the use of oil and electricity generated by oil. Decrease the CODecrease the CO22 emissions from the hotel sector. emissions from the hotel sector. Decrease the necessery installed power of the Decrease the necessery installed power of the

thermoelectric plants to cover the power needs in the thermoelectric plants to cover the power needs in the island.island.

Decrease the currency used to import the oil from abroad.Decrease the currency used to import the oil from abroad.

THANK YOU FOR YOUR KIND THANK YOU FOR YOUR KIND ATTENTION ATTENTION

JOHN VOURDOUBASJOHN VOURDOUBASTEI OF CRETETEI OF CRETE