Stakeholders

Function : Designer

ENGINESA

[email protected]

 http://www.enginesa.ad


architects and thermal engineering designer

Contracting method

Separate batches

Type of market

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Building users opinion

Users are happy because their heating cost is very low and the comfort has increased.
Owner is happy too because he can grow up the price to rent the apartments, even if the users pays less than before (because the heating cost). He is happy too because he has a waiting list to rent their apartments.

Energy consumption

• Primary energy need : 4,50 kWhpe/m².year
• Primary energy need for standard building : 55,00 kWhpe/m².year

Calculation method : Primary energy needs

CEEB : 0.0001

Breakdown for energy consumption : heating made by central heat pump. Consumption 4.5 kWh/m2/year
hoot water production by heat pump. consumption 21 kWh/m2/year
lighting 104.5 kWh/m2/year

• Initial consumption : 212,00 kWhpe/m².year

Envelope performance

• Envelope U-Value : 0,24 W.m^-2.K^-1
More information :

Primary facade, U=0.24 W/m2/K
Secondary facade U=0.34 W/m2/K
Facade to neighbor U=0.27 W/m2/year

• Building Compactness Coefficient : 2,90

Indicator : n50

• Air Tightness Value : 2,40

Real final energy consumption

Final Energy : 130,00 kWhfe/m².year

Real final energy consumption/m2 : 130,00 kWhfe/m².year

Real final energy consumption/functional unit : 4,64 kWhfe/m².year

Year of the real energy consumption : 2 013

Systems

Heating system :
• Heat pump
• Water radiator
Hot water system :
• Heat pump
Cooling system :
• No cooling system
Ventilation system :
• Natural ventilation
Renewable systems :
• No renewable energy systems
• Renewable energy production : 100,00 %
Solutions enhancing nature free gains :

solar gains control by blinds

Smart Building

BMS :

Control on/off, viewer of any parameter like temperatures, % opened of motorized valve, pump parameters (% velocity, flow, pressure, energy), instant and cumulated electrical and thermal energy consumption

Users’ opinion on the Smart Building functions : facility controlled by a Desigo Insight central control by Siemens

Urban environment

Building in Andorra la Vella down town, shopping zone

• Land plot area : 350,00 m²
• Built-up area : 100,00 %

Product

rockwool external pipe insulation 2x5cm each pipe

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exterior pipe insulation

very good insulation with this thickness

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daikin heat pump

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Heat pump for heating low temperature (max 50ºC) and high efficiency COP between 2.84 to 3.77, ESEER 3.78.
It works at proportional temperature to outdoor temp to achieve always maximum COP.


We use with this heat pump, existing old radiators (high temperature and high emission) to heat this buiding after refurbishment, working at low temperature and low emission.

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daikin altherma for DHW

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High temperature heat pump to produce domestic hot water (DHW)

Produces low cost hot water. No problems

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grundfos magna 3 for heating and DHW

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Electronic pump with connection to BMS control system, data transmission: pressure (bar), flow (m3/h), instant consumption (W), cumulate consumption (kWh), thermal flow (kWh).
Working at constant temperature function (hot water production) or at constant pressure function (for heating facility)

Sometimes the pump stops without any order

Construction and exploitation costs

• Renewable energy systems cost : 35 000,00 €
• Cost of studies : 22 000 €
• Total cost of the building : 340 000 €
• Subsidies : 30 000 €