Bring climate change to your office

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Stella Harrell
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1 DELTA protects property. Saves energy. Creates comfort. Bring climate change to your office DELTA -COOL P R E M I U M Q U A L I T Y

2 P R E M I U M Q U A L I T Y 2

Stay cool even without air conditioning Heat impairs efficiency and health at work Heat build-up causes discomfort A current medical health study finds that 40 % of Germans feel that their health is

3 Stay cool even without air conditioning Heat impairs efficiency and health at work Heat build-up causes discomfort A current medical health study finds that 40 % of Germans feel that their health is impaired by air conditioning. Air conditioning consumes expensive energy Historical buildings, churches, castles, and similar structures all have an adequate thermal-storage mass for retaining heat energy, so that interiors remain nice and cool in summer. Modern lightweight constructions lack this thermal-storage capacity, so that room temperatures may quickly rise to a level that is equal to or even higher than the temperature outside. The conventional way of solving this problem is to install expensive air-conditioning systems with all their well-known economic, ecological, and medical drawbacks. Change to DELTA -COOL by Dörken, the innovative, energy-saving solution for landscape offices, lightweight and steel-skeleton structures, and other large buildings. 3

The easy way to a feelgood atmosphere Smart temperature management through PCM DELTA -COOL: PCM for passive climate control This phase

This makes DELTA -COOL ideal for use even in buildings where fire-prevention requirements are stricter than normal.

The heat thus stored is emitted again as soon as the phase change is reversed.

Advantages of the DELTA -COOL System Non-combustible, non-toxic, flame-retardant.

Lower perceived temperatures through additional cooling surfaces.

Any additional energy input that may be required can be moved to the cheaper hours of the night.

Little time and space required for installation. Another economic advantage: no servicing and operating expenses.

4 The easy way to a feelgood atmosphere Smart temperature management through PCM DELTA -COOL: PCM for passive climate control This phase change material (PCM) works like a heat storage unit. It consists of salt hydrates which, unlike paraffins, are not combustible. This makes DELTA -COOL ideal for use even in buildings where fire-prevention requirements are stricter than normal. Under the influence of heat, DELTA -COOL changes its state of aggregation from solid to liquid as it reaches its melting temperature. The heat thus stored is emitted again as soon as the phase change is reversed. In this way, temperature fluctuations may be mitigated and temperatures peaks prevented without any need to expend energy on cooling. Advantages of the DELTA -COOL System Non-combustible, non-toxic, flame-retardant. Comfortable interior climate without irritating noise and dangerous draughts. Lower perceived temperatures through additional cooling surfaces. High energy density at 22 C to 28 C; 1 litre of DELTA -COOL will absorb as much energy as 10 litres of water. Any additional energy input that may be required can be moved to the cheaper hours of the night. Energy stored during the day may be used at night. In the event of a removal or room rededication, PCMs can be moved or rearranged. Little time and space required for installation. Another economic advantage: no servicing and operating expenses. Concrete Masonry Massive pine wood Lightweight construction DELTA -COOL = = = = 24 cm 36 cm 38 cm 226 cm 2 cm P R E M I U M Q U A L I T Y Various material thicknesses having a heat-storage capacity of 5,700 kj (10 C temperature increase) Typical circadian temperatures in rooms with and without DELTA -COOL 32 With DELTA -COOL 24 Without DELTA -COOL 24 Outside air Heat emission Heat absorption Temperature [ C] :00 6:00 9:00 12:00 15:00 18:00 21:00 Time Small volume, great effect: the cool answer to hot energy prices! 4

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DELTA -COOL: the versatile energy saver Ideal for landscape offices and other large structures These references speak for themselves P R E M I U M Q U A L I T Y Gästehaus Pollmeier Pollmeier

At its headquarters in Creuzburg, Thuringia, the company has its own guesthouse which was completed in 2006.

KG Design Cornelsen + Seelinger, architects, Darmstadt, Berlin, Amsterdam, www.cornelsen-seelinger.

com Ludwig Erhard School, Karlsruhe The pavilion on the school premises was enlarged by 12 classrooms by adding an annex and another floor.

The ventilation system features latent-heat storage to optimise energy consumption.

6 DELTA -COOL: the versatile energy saver Ideal for landscape offices and other large structures These references speak for themselves P R E M I U M Q U A L I T Y Gästehaus Pollmeier Pollmeier Massivholz GmbH & Co. KG operates the largest and most advanced hardwood sawmills in Europe. At its headquarters in Creuzburg, Thuringia, the company has its own guesthouse which was completed in Its elegant, lightweight design is ideal for using DELTA -COOL to save both space and energy. Typology Commercial buildings/hotels and accommodation Owner Pollmeier Massivholz GmbH & Co. KG Design Cornelsen + Seelinger, architects, Darmstadt, Berlin, Amsterdam, Floorspace 670m2 Gross volume 4,049m3 Primary energy consumption 16 % EnEV Photos Cornelsen + Seelinger Architekten, Ludwig Erhard School, Karlsruhe The pavilion on the school premises was enlarged by 12 classrooms by adding an annex and another floor. All new rooms receive light and ventilation from two sides to ensure efficiency and sustainability together with low maintenance costs. The ventilation system features latent-heat storage to optimise energy consumption. Typology Owner Architects Total floorspace Volume Award Photos Public buildings/schools City of Karlsruhe (Building Department) Assem Architekten, Karlsruhe, 1,575m2 (extension only) 6,700m3 (extension only) Wood construction prize, Baden-Württemberg 2009 stephan baumann, karlsruhe, Rehabilitation and reconfiguration of a reception area at a corporate head office The owner wished to rehabilitate his head office from the ground up and create office floorspace that is flexible enough to permit readjusting the ground-plan effortlessly for years. The central corridors are multifunctional areas offering space for copiers, cabinets, and a tea point. The offices are remarkable because they are not equipped with conventional air conditioning. Instead, climate control is assured by DELTA -COOL latent-heat storage units installed in the ceiling. Typology Commercial buildings/ administration buildings Owner Dörken Service GmbH Architects Frielinghaus Schüren Architekten, Witten, Net floorspace c. 1,150m2 overall Volume c. 10,500m3 6 Photos Peter Strehl, ps@frielinghaus-schueren.de; michael schilderoth, herdecke,

Interior climate improvement with DELTA -COOL typical simulation 36 34 32 30 Temperature [ C] 28

temperatures in a rehabilitated lightweight building with and without PCM in midsummer Interior

Room size: 15 x 30 m. Roof sloping from 3 to 4 m.

Floor and outer wall of reinforced concrete.

No mechanical ventilation. Free exchange of air at a rate of 0.2 l/h.

The result: the interior climate remains balanced even in midsummer periods of heat, and

7 Interior climate improvement with DELTA -COOL typical simulation Temperature [ C] July 1 July 2 July 3 00 h 12 h 00 h 12 h 00 h Histogram showing interior temperatures in a rehabilitated lightweight building with and without PCM in midsummer Interior temperature without PCM Interior temperature with PCM 12 h Dynamic building simulations serve to generate meaningful histograms. This ex am - ple shows three simulations of a rehabilitated canteen in Aschaffenburg. Room size: 15 x 30 m. Roof sloping from 3 to 4 m. 30 m southern facade with 42 % of externally shaded windows. Standard glazing. Floor and outer wall of reinforced concrete. Interior walls and flat roof of lightweight construction. Max. heat load 55 W/m2. No mechanical ventilation. Free exchange of air at a rate of 0.2 l/h. Suspended plasterboard ceiling completely covered with DELTA -COOL. The result: the interior climate remains balanced even in midsummer periods of heat, and temperatures peaks are mitigated. Hours per year Without PCM 100 With PCM 0 Hours of excessive heat with temperatures above 26 C Hours per year Without PCM With PCM 0 Hours of heating with temperatures below 21 C See for yourself! All the data you need for your own thermal simulation programme are obtainable from Dörken. 7

Passive climate control: innovative and cost-efficient The DELTA -COOL method Protects your purse and the environment The DELTA -COOL System solution can be installed quickly and lasts extremely long.

8 Passive climate control: innovative and cost-efficient The DELTA -COOL method Protects your purse and the environment The DELTA -COOL System solution can be installed quickly and lasts extremely long. Tests demonstrate the capability of the material to continue functioning safely for 25 years without maintenance or loss of performance. Its life is markedly longer than that of a conventional air conditioner. Structural prerequisites for the DELTA -COOL System Ceiling panels should have good heat conductivity; metal panels are ideal. Whenever insulating materials such as mineral fibres or plasterboard are used, make sure that air from the room can flow around DELTA -COOL in the ceiling cavity. There should be natural or mechanical ventilation to ensure that charged PCMs can release their heat at night. Like any other natural cooling system, PCMs should not be exposed to extreme heat, such as direct insolation. Histogram showing the prices of electricity, fuel oil and natural gas P R E M I U M Q U A L I T Y Electricity Fuel oil Natural gas Price [Cent/kWh] 8

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The economical solution DELTA -COOL: this cooling system soon breaks even Sample calculation In this example, the efficiency of a new office building was calculated in conformance with the annuity

11 The economical solution DELTA -COOL: this cooling system soon breaks even Sample calculation In this example, the efficiency of a new office building was calculated in conformance with the annuity method as laid down in VDI The following constraints apply: Night-time cooling through electronically controlled ventilation flaps Functioning interior cross-ventilation Period under consideration: 25 years Interest factor: 6 %; price increase rate: 3 % p.a. The result: Savings on maintenance and operating costs quickly surmount the somewhat higher cost of investment. All in all, there will be annual savings compared to other cooling systems. Specific costs over 20 years Euro Energy costs Operating costs System costs 250 Costs [Euro/m 2 ] Euro 29 Euro 89 Euro 7 Euro Euro Euro 103 Euro 86 Euro 0 Cooling ceilings Air cooling PCM with exhaust system Electricity consumption 14 Electricity consumption [kwh/m2 NGFa ] ,2 6 5,7 6 Power draw, nighttime ventilation Cooling Power draw, daytime ventilation Cooling ceilings Air cooling PCM with exhaust system 0,7 1,5 11

DELTA -COOL: for a better office climate Facts in brief Technical data, DELTA -COOL 24 Basic material Salt hydrate Flammability DIN EN 13501-1 Melting temperature 22 28 C Crystallisation

2 kj/kg K Thermal conductivity (solid/liquid) 1.12/0.56 W/m K Maximum temperature 60 C Weight 4.0 kg (of which 3.

S 26 after eye contact, rinse thoroughly with water and consult a physician immediately. DELTA -COOL Board DELTA is a registered trademark of Ewald Dörken AG, Herdecke, Germany.

12 DELTA -COOL: for a better office climate Facts in brief Technical data, DELTA -COOL 24 Basic material Salt hydrate Flammability DIN EN Melting temperature C Crystallisation temperature 22 C Cooling performance W/m2 Melting energy 158 kj/kg = 44 Wh/kg Density (solid/liquid) 1.6/1.5 kg/l Thermal capacity (solid/liquid) 2.7/2.2 kj/kg K Thermal conductivity (solid/liquid) 1.12/0.56 W/m K Maximum temperature 60 C Weight 4.0 kg (of which 3.0kg DELTA -COOL 24) Dimensions/application 610 x 610 x 17 mm Hazard warning: R 36 eye irritant. Safety advice: S 2 keep away from children. S 26 after eye contact, rinse thoroughly with water and consult a physician immediately. DELTA -COOL Board DELTA is a registered trademark of Ewald Dörken AG, Herdecke, Germany. Quick, easy installation Dörken GmbH & Co. KG DELTA Membrane Systems Ltd. Wetterstraße 58 Delta House D Herdecke Merlin Way, North Weald Tel.: /63-0 Epping, Essex, CM16 6HR. Fax: / Tel: +44 (0) Fax: +44 (0) bvf@doerken.de info@deltamembranes.com Web: A company of the Dörken Group

DELTA -COOL 24. Phase Change Material Thermal Storage Mass for a Comfortable Interior Climate. PREMIUM QUALITY

DELTA -COOL 24. Phase Change Material Thermal Storage Mass for a Comfortable Interior Climate. PREMIUM QUALITY DELTA protects property. Saves energy. Creates comfort. DELTA -COOL 24 PREMIUM QUALITY Phase Change Material Thermal Storage Mass for a Comfortable Interior Climate. Permanent function without energy input.