Environmental, climate friendly hotels

Dr.-Ing. Sven Eckardt

Energie- und Umwelt-

management in Hotels

Dr. Sven Eckardt

Doctor of Engineering Science (energy and environment)

since 2005 Lecture on energy and environmental management at

University and Cooperative Education Stuttgart

since 2005 Consultant for energy and environment for DEHOGA

(German hotel association), Berlin

since 2007 independent freelancer and consultant for hotels

since 2008 senior auditor and senior consultant for FICHTNER

since 2010 senior consultant for blueContec and TUI

Country experiences: Germany, Austria, Swiss, France

Italy, Greece, Cyprus, Spain, Turkey, Tunesia, Brazil, Egypt, Bahamas

CANARY ISLANDS 5 hotel audits

(Jardín Tropical, Gran Melia, RIU Garoé

) TURKEY 25 hotel audits

(Iberotel Palm Garden,

Amara Wing, Gloria Golf ...)

GERMANY

200 hotel audits

(Seesteg Relais & Châteaux

Best Western Premier Ambassador …)

GREECE 5 hotel audits

(Blue Palace,

Grecotel Marine Palace …)

BAHAMAS ISLANDS 18 hotel audits &

10 public buildings

(British Colonial Hilton, Atlantis …)

BRAZIL 5 hotel audits

(Tropical Tambau…)

DOMINICAN REPUBLIC (Paradisus Punta Cana)

EGYPT 13 hotel audits

(Steigenberger El Gouna…)

Tunesia 2 hotel audits

(Holiday Village, Manir.…)

Indicator: CO2

Calculation and conversions

Basic calculation and conversions:

Electricity information from electricity company

Gas 220 – 255 g/kWh

Fuel 320 – 329 g/kWh

Wood 21-24 g/kWh

Woodpellets 29-31 g/kWh

CO2 emissions for a 7 days holiday / 4 ****hotel with spa

Standard-Hotel: 140 kg CO2 Quelle: IER

CO2 – in hotels - calculations

Green Electricity and own PV System:

(13% PV + 87%Green Electricity) * 80.000 kWh =

(0,13 * 135 g/kWh + 0,87 * 47,62 g/kWh) * 80.000 kWh = 4,7 t CO2

or

Comparison with Electricity Mix Germany

560 g/kWh * 80.000 kWh = 44,8 t CO2

Electricity consumption and CO2

273.000 kWh Fuel * 300 g/kWh = 81,9 t CO2

or

173.000 kWh (64%) Woodchips * 30 g/kWh = 5,2 t CO2

100.000 kWh (36%) Gas * 250 g/kWh = 25,0 t CO2

Heating / warm water system and CO2

Baden-Württemberg: 7,4 t CO2 per anno

Germany: 10,1 t CO2 per anno

Quelle: Dr. Helmut Büringer, statistisches Monatsheft Baden-Württemberg 5/2004

CO2 per Person in Germany

VW Lupo (3 Litre Diesel) with 86 g CO2 / km

45.000 km per anno = 3,9 t CO2

Mercedes (8 Litre Super) with 192 g CO2 / km

12.000 km per anno = 2,3 t CO2

In Hotels : every hotel is different, CO2 per overnight stays, places

restaurant, air conditioned or heated area, swimming pools and spa,

shopping area, etc.

Kilometer and CO2

Good examples

and information

Best Western Premier

Hotel Victoria, Freiburg

www.victoria.bestwestern.de

Seehotel Wiesler, Titisee

http://www.seehotel-wiesler.de/

Die Halde, Schauinsland

www.halde.com

Benchmarks: Energy Hotels

Benchmark Energy Hotel without restaurant

Step 1: reduce

energy consumption

Savings

20 cm insulation roof 10 %

new windows or modified windows 10 %

12 cm insulation walls outside 30 %

6 cm insulation cellar 5 %

new a/c system 10 - 20 %

heat recovery from coolers and deep freezer

contribute to warm water supply

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Identify your peak electricity loads and manage them

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Optimal peak load management

Minimize your

electricty peak

with a sensible

management of

electricity intensive

processes or

automatically

with a

maximum demand

monitor

Step 2: Find your

own energy concept

Solar collectors produce warm water for showers and

swimming pool

Integrated Collector and Storage (ICS) = ‘Batch heaters’

- tank (about 100 to 250 litres) acts as both storage and solar collector

- easily plumbed in series between cold water supply and

the conventional water heater

- passive system: easiest design, robust and easy to maintain,

no electricity required

- low investment (about 1500 € for 4 persons household)

- heavy load on the roof

- looses much heat at low ambient temperatures (i.e. during night)

tank type ICS tube type ICS

Integrated Collectors and Storage (ICS)

- the most popular SWH system worldwide

- storage tank (up to 300 litres) above collector:

- easy to maintain,

- no electricity

- low investment

- heavy load on the roof

- better heat tank isolation than batch heater

- no protection against freeze

- mainly with flat plate collectors

In a closed-loop thermosiphon (‘jacketed SWH’)

a freeze protection liquid (glycol) can be used,

however to the expense of lower performance

due to higher fluid viscosity and losses in the

heat exchanger

open loop thermosiphon

closed loop

thermosiphon

Thermosiphons

- more efficient than passive systems for hot water demand of about 300 to 500

litres per day and above

- if water is hot in the collector, a controller turns a pump on

- storage tank usually in-house

- applicable not only for hot water supply but also for supporting space heating

- goes with flat plate collectors as well as with vacuum tube collectors, the latter

being particularly suitable for generating higher temperatures (above 80 to 95

Celsius)

Direct flow evacuated tube:

two tubes with vacuum in-between Heat pipe: uses a liquid easily

evaporating in vacuum

Flat plate collector

Active Systems

- Pool heat demand mostly coincides with

sunshine

- Solar pool heaters have to yield only

gradual temperature increase

- Thus, simple and far less expensive

polymer collector without any heat

insulation are viable that have to cope only

with pool water quality

- probably the most profitable solar water

heating application

Pool heating

Use photovoltaic panels to produce your own electricity

Step 3

Continuous

Improvement

Step 4 :

Promoting and

Marketing

Eco Labels and management sytems

مع السالمة

شكرا

We have no time ...

Dr. Sven Eckardt

Tel. 0049 7034 27 93 25

eckardt@eckardtconsulting.de

www.eckardtconsulting.de