Heat Pump City of the

Year Award 2013

Applications Overview

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1. Aarhus, Denmark

Second biggest city in Demark, having Climate Plan 2012-2015: increased use of heat pumps,

replace boilers with heat pumps in existing buildings

Project: Social Housing,Pilevangen in Solbjerg, Århus.

Details:

• ”Building of the year 2011” in the housing category in the magazine BYGGERI.

• The houses range from 80m2 to 114m2, construction finished in 2011

• Partly financed by the city and with rent-control

• 43 houses with remarkably low energy consumption- more energy produced than consumed

• The heating and comfort equipment produce 15.1 kWh per m2/year

• Integration of heat pumps:

• The houses are equipped with air to water heat pumps, floor heating, air ventilation system and solar cell

systems which both save and also produce energy

• Water heat pumps supply both domestic hot water and water for space heating

• HPs as a crucial tool to achieve the very strict building regulation coming into force in 2015.

• The use of HPs is very beneficial in the so-called energy frame calculation to meet the regulations

“A building project that really shows the way for future residential development in the fossil-free society.”

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2. Amstetten, Austria

City with 20.000 inhabitants, being very active in terms of sustainable city development

Details:

• Austrian pilot project to explore and optimize the use of waste heat in the city

• October 2012: First waste water plant established, powered by the Austrian “Klima und Energiefonds”

• March 2013: Awarded with the Energy Globe Award for Niederösterreich

• Chosen without further government funding: sign of being very convinced

Integration of heat pumps:

– 1 heat pump of 230kW; three 1.500 liter tanks; 210m district heating pipe (from channel to building)

– Waste water from city channel as energy source for heat pump (heating and cooling)

– Supplies both Stadtwerke Amstetten building and neighbouring power plant

– HP covers 99,9% of energy demand; existing gas-boilers as back-up

– COP 5.6: only 18% of energy comes from electricity > 82% is renewable

– Annual CO2 reduction: 55 tons (72%) > CO2 emission nearly zero due to hydro-powered electricity

– 85% more energy-saving than gas boilers

– ROI: 12 years

• Multiplication effect:

– Model for heating and cooling could be transformed to about 400 Austrian communities

– Possible to transfer to any city with waste water channels, considering the adequate conditions

– Also applicable for purified waste water

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3. Bardolino, Italy

Project: Aqualux Hotel, an eco-friendly 4 star hotel. Area of 17,000 m2, 113 rooms, 33 suites, 7 swimming pools

and fitness centers

• Aqualux is a Climahotel with high environmental standards certified by Casa Clima Italian agency

• Heating systems using geothermal energy and other technical installations of the hotel contribute to high energy

efficiency

Details:

Minimized energy consumption and CO2 emissions into the atmosphere because of :

• the reduction of energy requirements

• the exploitation of renewable energy sources

• the installation of high energy efficiency plants

Integration of Heat Pumps:

• 2 water source multipurpose INTEGRA units ERACS2 WQ-1902 which produce heating and cooling

simultaneously

• 40% of the total request of hot water is produced by a solar thermal plant (140 m²) which also transfers energy

to the low temperature heating system.

• The cold fluid production for the air-conditioning, the partial production of sanitary hot water and the heating of

swimming pools came therefore through water source multipurpose geothermal heat pumps.

Only one unit responds to both needs simultaneously reduces running costs by reducing the total cost of

the plant life cycle, with the quickest payback of initial investment.

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4. Brugge, Belgium OCMW Bruges owns several residential care centers, nursing homes and other public buildings.

Investment in low-energy buildings to achieve:

• Energy savings

• Educate the private and public sector about low-energy solutions

The use of heat pump technology is at the core of this initiative

2011: WZC De Vliedberg: a 11.500m2- residential care center which contains a nursing home for 96 elderly people

and operates as a day care center with an additional 35 service-flats

Details:

• Floor heating and floor cooling

• A monovalent installation consisting of a sole heat pump requires high capacity and has not proven

economically feasible

• The heat pump serves as a base load (heating capacity of 325kW and a cooling capacity of 265kW)

• A condensing gas boiler of 530kW assists in the case of a peak demand and serves as a back-up

• Hot tap water is provided by a gas boiler after a pre-heating by the heat pump system

• The average performance of the heat pump system is increased by adding a relatively high temperature source

in the winter and a cold source in the summer

The system reduces the primary energy usage of both heating and cooling. Economic estimations show a

simplified payback time of 10,3 years and an internal rate of return of 20% at 20 years. The back-up gas

boiler makes the installation highly reliable.

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5. Milan, Italy

Project: Aproti Palace in Milan, regeneration of the historic seat of the Royal Post

• A newly seven-floor office building. The project is part of a larger urban regeneration project in Milan managed

by Hines Italy.

Details:

• A 4-pipe system based on heat pumps for simultaneous, integrated and independent heating and cooling

production.

• The system is equipped with 4 air source units type ERACS / Q 2722 / LT / SL, optimised for low noise emission

and operating limit down to -10°C external air temperature

• Total cooling capacity is 2,800kW and heating capacity is 2,400 kW. The units have been selected in SL version

to ensure the minimum noise level.

Integration of heat pumps:

• Heating and cooling of the whole complex by Integra heat pumps -> reduced operating costs

• High energy efficiency because of multi-purpose units instead of chiller and boiler solutions

• Less space occupied because of "all in one” units (exchangers and water connections)

Overall Benefits:

• The project represents an effective alternative to the traditional chiller and boiler system.

• Comfort without CO2 emissions in the atmosphere

• Significant running cost reduction.

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6.Nürnberg, Germany Since 2007, The NürnbergMesse GmbH organised many conferences on the heat pump

technology

- Offers information and communication platform for both heat pump producers and

researchers

• Organises Chillventa: international fair on cooling, ventilation and heat pumps

• Since 2009: the European Heat Pump Summit > B2B-congress on heat pumps in Nürnberg

- Biggest in Europe on the heat pump technology

- Experts from industry, research and associations meet every two year at this Summit to

discuss political frameworks, markets and technical standards

- In 2011: 466 participants (2009: 270)

- 2013: 3rd edition > smart grids, hybrid systems, ecodesign…

- Contributes to sector development and to the increase of competition of heat pumps

towards other heating technologies

- Raises awareness for associations and sectors who promote heat pumps

- Offers a framework for messages towards the press and public

• As such, Nürnberg as central “place of competence” with regards to heat pumps

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7.Plaidt, Germany Beginning of last century: A school building in Plaidt was built in full compliance with the standards of that time

2010: The existing heating system was retrofitted and renovated by the local municipality of Plaidt

Details:

• Use of renewable energy sources

• A ground source Gas Absorption Heat Pump has been installed in cooperation with the local municipality of

Plaidt and the gas utility Energieversorgung Mittelrhein (EVM).

• The total heating load of the building is approximately 90 kW.

Integration of heat pumps:

• Gas Absorption Heat Pump (maximum capacity of 40 kW) in combination with a back-up boiler (for peak load

coverage and very cold days) of 50 kW heating capacity

• Using up to 40% renewable energy

Multiplication effect:

• ideal solution for heating and cooling multi-family houses, factories, public administration buildings and

commercial premises

• GAHP installations are easy to replicate: 8,028 already installed Gas Absorption Heat Pumps save 12,845 TOE

and the emissions of 33,718 Tons of CO2 every year. CO2 equivalent to the emissions of 16,056 green cars or

those absorbed by 4,808,772 trees

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8. Tallinn, Estonia Project: “The family friendly living for the children”

• financed by the European Regional Development Fund (85%) and the Tallinn City Government (15%).

Details:

• 5 double houses and 2 detached houses are constructed in the frame of this project

• The houses are designed to have low energy consumption (< 40 kw/m2 per year) and they involve:

– High quality thermal insulation (thickness 300/400mm), the wind baffle plate (20mm)

– The ventilation system is designed with high heat recovery

Integration of heat pumps:

• A split air/water heat pump is installed (ACVM 270, AMS 10, 12 kW)

• It combines a well-designed, high quality outdoor unit with an indoor unit, stratification accumulator tank

Sonnenkraft PSC-800

• Solar panels on the roof and integrated accumulator tank for generation of domestic hot water

• The stratification accumulator tank provides the heat for the under- floor heating system

Overall benefits:

• The heating costs may be reduced up to 65%

• The investment is relatively low since an air/ water heat pump does not require any geothermal drilling

• Environmental-friendly with lower CO2 emissions than a traditional fossil-fuel based heating system.

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9. Tallinn, Estonia Project: Seaplane Harbour (Lennusadam). It is a museum of naval history of Estonia.

Details:

• It uses seawater heat through heat exchanger and heat pumps deliver the heat to the hangars

• The same system works also as a cooling system on summer season.

The open sea heating contains:

– 2 storey sea heating chambers

– a water-water heat pump (161,6kW + 125,1kW + 107,5kW; total 394,2 kW)

– electrical heaters (180kW), a heating boiler (120kW),

– heat accumulation tanks (2x2000L) and heating and ventilation system pipes

Integration of heat pumps:

• 3 heat pumps differed by the output power connected in cascade system -> they create a whole unit.

• The Heat pumps automatic control system is directing circluations pumps, electric heating boilers, compressors, seawater

pumps and cooling system.

• The heat pumps are the main connection between the seawater heat exchanger and the hangars heating system

The outstanding feature of using the seawater for heating is unique in Estonia. Also the system is open – not using

collectors (pipelines) in aquatic area of the port or far from the coastline. The environmental side of the project is also

not less important, as this is a form of a renewable source of energy and therefore its overall costs to the eco-system

are lower.

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10. Villa Real, Portugal

Project: School building of 2.100 m2.

• Use clean energy through ground and solar exchange and to produce most of the energy needed

• The funding of the project comes from the European Regional Development Fund

Details:

• Hybrid system, with

• 83, 6 kW water to water Heat Pump

• a natural gas 150 kW boiler to be used as backup mainly

• 30 m2 solar panels.

• The distribution of heating and cooling is made trough a radiant floor system and Recovery Air Treatment Units with

thermal correction.

• 9 geothermal holes of 50 meters each will provide a basic ground temperature for the system

Integration of heat pumps:

• The system has three major components: a heat pump, an earth connection and an interior heating or cooling

distribution system

• The heat pump transfers the heat between the heating/cooling distribution system and the Earth connection. It is the

basic building block of the GSHP system

• The earth connection is where heat transfer between the GSHP system and the soil occurs

• The heating/cooling distribution system delivers heating or cooling from the heat pump to the building. In this case

water loop systems were used, which heat or cool floors

The use of this technology in Portugal is not very common. Since this building is a school it can become a case

study for other public buildings in regional and national level.

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11. Vicenza, Italy Project: Tvzeb is an experimental zero energy building

2012: the Traverso0vighy studio and the University of Padua, Technical Physics Department coordinated so as to

build it.

Area: 190 m² Volume: 940 m³ Energy performance Total 10200 kWh/y Heating 17,3 kWh/(m²y) Total emission of

carbon dioxide 2,73 KgCO2/(m²y)

Details:

• Powered by internal energy sources (wood combustion, solar and geothermal energies)

• Building completely self-sufficient, thereby fulfilling the European Directive 2010/31/EU that prescribes all new

public buildings from 2020 to be zero-energy buildings

Integration of Heat Pumps:

• A geothermal heat pump at the center of the building controls the temperature of the flow of air and water, \

• The heat pump is fueled with the energy produced by photovoltaic system and the wood burning stove is

supplied by garden pruning.

• Photovoltaic panels cover the roof of the minor building block. This system supplies the annual energy demand

of all the building’s functions.

One of the primary aims of the project is to provide a proven model for zero energy buildings that fulfills the

standards required by the European Directive 2010/31/EU.