skanska commercial development nordic · estonia romania revenue by geographic areas nordic...

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Energy efficient office buildings Skanska Commercial Development Nordic

Jonas Gräslund 2013 05 16

United States

Brazil

Argentina

Chile

Peru

Venezuela

Colombia

Sweden Finland Norway

Denmark United Kingdom Poland

Slovakia

Hungary Czech Republic

Estonia

Romania

Revenue by geographic areas

Nordic countries 44% Other European countries 21% The Americas 35%

We are active in selected home markets

Jonas Gräslund 2013 05 16 2

− Initiates, develops, leases and divests commercial property projects

− Focus on office buildings, shopping centers and logistics properties

− Presence in Sweden, Finland, Norway, Denmark, Poland, Czech Republic, Hungary, Romania and USA

− 270 employees

Commercial Property Development

Green Towers, Wrocław, Poland


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Skanska CDN Markets

Helsinki Stockholm

Malmö Copenhagen

Gothenburg

Oslo

• Skanska Fastigheter Stockholm • Skanska Fastigheter Göteborg • Skanska Öresund, Malmö • Skanska Öresund, Copenhagen • Skanska Commercial Dev. Helsinki • Skanska Commercial Dev. Norway

Stavanger New!


Track record 1996-2010 Skanska CDN

117 projects 1,3 million sqm



Helicopterview on energy consumption


Frame Program based on strategy regarding mechanical installations

− Low environmental impact

− Low life cycle cost

− Flexibility

− Non complex solutions


VAV (variable air volume) Many motors, sensors, AHUs , COMPLICATED


CAV (constant air volume) + chilled beams , SIMPLE


+5o

Supply Air Handling Unit Outdoor air

+20o

Supply air

+22o

Exhaust air

Exhaust Air Handling Unit

Traditional 2,3 m/s 40 kWh/m2


Supply Air Handling Unit


1,6 m/s and no sound attenuators 22 kWh/m2

Slow air


Supply Air Handling Unit


Low speed 1,0 m/s and double heat exchangers 11 kWh/m2

Slow air


Air Handling Units, from 2,3 m/s to 1,0 m/s

Sundbypark ”Trad alt” Choosen alt 1,6 m/s 28 kWh/m2 22 kWh/m2 operation 1.900´ 1.510´ investment 650´ 850´ (+200´) TOTAL 2.6 milj SEK 2.4 milj SEK

HagaPorten I ”Trad alt” Choosen alt 2,3 m/s 40 kWh/m2 32 kWh/m2 operation 4.240´ 3.300´ investment 1.115´ 1.175´ (+60´) TOTAL 5.3 milj SEK 4.5 milj SEK

Lustgården 14, prel ”Trad alt” Choosen alt 1,0 m/s 20 kWh/m2 11 kWh/m2 operation 2.140´ 1.040´ investment 890´ 1.740´ (+850´) TOTAL 3.0 milj SEK 2.8 milj SEK


Free cooling preheats supply air


Skanska Self regulating cooling beams,

+5o

Chilled Beam Supply Air Handling Unit Outdoor air

+22o C

KB2 +16/+19o C

Free cooling coil increase the outdoor air temp With approx 3o C (from +5o to ca +8o C), with 2 pipe coil KB2-SV21 is closed all winter

Temperature in KB2 system is controlled by by variable speed of circulation pump in glycol circuit, in sequence with control valve for KB2.

KB1 +8/+18o C

0%

+16o C


Ventilation in two steps

Supply

Office

Garage

Exhaust

Traditional Chiller

Building

Chiller

Chilled water system 6o – 12o C

COP = approx 3 (cooling)

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Traditional Ground Source heating and cooling system

Building

Heat pump

Ground storage Ground temperature approx 5o C


COP = approx 4 - 5 (heat + cool)


Skanska Deep Green Cooling

Building

Circulation pump

Ground storage Ground temperature approx 12o C


COP = 25 - 30 (cooling)


Deep Green cooling

Ground bore hole storage operates in normal ground temperature.

Summertime the building is cooled by the ground. Wintertime the building is partly heated by the ground, as the air for ventilation cools down the ground. The ground will be heated during summer and cooled to its original temperature during winter. Robust solution, no chiller or heat pump needed. The selv-regulated cooling beam system is operating In room temperature level.

Patent in Sweden, Pat pended in EU and US



Sequence control of cooling - heating

Chilled beam

radiator

Control unit

Chilled water Power 24 V

Temperature sensor

Motor valve


radiator

Self regulating cooling

Cooling beam

Chilled water

Self regulation chilled beams

− P = k x A x dT P = cooling power

A = heat transfer area

dT = temp difference room and chilled water

Troom = 25o C, TCW = 14/18 o C

P = k x A x 9o C

Troom = 25o C, TCW = 20/24 o C

P = k x 3A x 3o C


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Bild från Lars-Ove Matsson, Sweco


Bild Jonas Gräslund

Entré Lindhagen, Stockholm. Mounting of U-tubes in bore hole



Entré Lindhagen. Collector for pipes from bore holes



Entré Lindhagen. Collector


Picture Jonas Gräslund

Entré Lindhagen. Site with bore holes



Stockholm, Lustgården 14

Lettable area: 55 000 m2 Parking in garage flexible ventilation chilled beams coil heat recovery free cooling AHU 1,0 m/s and double heat exch self regulation chilled beams Passive house windows U = 0,9 Deep Green Cooling Estimated energy consumption 49 kWh/m2


Temperature out from ground during 5 years

Annual mean outdoor temperature in some cities

− Helsingfors +5,0o C

− Stockholm +6,6o C

− Göteborg +7,9o C

− München +7,9o C

− Malmö +8,0o C

− Warzawa +8,2o C

− Köpenhamn +8,5o C

− Chicago +9,7o C

− Paris +10,6o C


Steps to Deep Green energy for CDN

Solution Heating Cooling* Power** Energy saving kWh/m2 ATemp kWh/m2 ATemp kWh/m2 ATemp kWh/m2 ATemp

CDN Standard office 45 26 17 -

Low Speed AHU - 9 - - 2 - 11

Better windows - 8 - - - 8

Deep Green Cooling: - 5 - 26 + 1 - 30 Solar Heating Seasonal Storage: - 23 - - - 23

Wind power: - - - 16 - 16 Total 0 0 0 - 88

Final energy consumption if all Green solutions are choosen is 0 kWh/m2 (88 – 88) *) Including process cooling **) Excluding tenant power

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Solar heating farm for district heating - Kungälv


Typical district heating in Sweden, possible solar heating

-

100 000

200 000

300 000

400 000

500 000

600 000

700 000

JANUARI

FEBRUARI

MARSAPRIL

MAJJU

NIJU

LI

AUGUSTI

SEPTEMBER

OKTOBER

NOVEMBER

DECEMBER

El

Olja

Förädlad bio

Naturgas

Värmepump

Kol

Torv

Oförädlad bio

Hetvatten

Spil lvärme

Avfall


Seasonal storage


Energy efficient office buildings

nZEB has to take into concideration:

-Robust solutions

-Load matching

-Grid interaction

-Real addition


− “We are determined to become the leading green project developer and constructor in our home markets”

− Johan Karlström, CEO Skanska


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