Detached house on the island of A Creba

by María J. Maroño Breijo
/
2017-05-26 00:00:00
/
Espagne
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17585 / ES

Extension + refurbishment

Building Type : Isolated or semi-detached house
Construction Year : 2014
Delivery year : 2015
Address 1 - street : 15250 MUROS, España
Climate zone : [Csb] Coastal Mediterranean - Mild with cool, dry summer.

Net Floor Area : 516 m²
Construction/refurbishment cost : 144 264 €
Cost/m2 : 279.58 €/m²

Proposed by :

Primary energy need :
117.04 kWhpe/m².year
(Calculation method : )

Energy consumption

Economical buildingBuilding

< 50A

51 à 90B

91 à 150C

151 à 230D

231 à 330E

331 à 450F

> 450G

Energy-intensive building

A creba Island or Illa da Creba, is a Spanish island in the province of A Coruña. It is located on the estuary of Muros and Noia, 240 meters from the shore of the parish of Esteiro. With an area of 7.5 hectares, it is topped by a large house. It is a building constructed in the early 80s, with a floor space of 516 m² spread over 5 full bedrooms, kitchen, living room and technical areas an an outdoor pool of 35 m². The aim is to replace the existing energy source with a total dependence on oil, comprised of a generator and diesel boiler by other existing sources of renewable energy on the island, always searching, when possible, the energy self-sufficiency, which is achieved in most part of the summer period (May -September).

Data reliability

Self-declared

Stakeholders

Function : Construction company

Contracting method

Other methods

Owner approach of sustainability

The main objective of the promoter is self generation of the energy necessary for the proper functioning of the housing, showing the utmost respect for the environment and the natural environment of the area in which the house is located. Until now, all the services enjoyed by the house were totally dependent on fossil fuels, particularly diesel, and given the location in which it is located, supply had to be transported by boat. All these constraints meant that housing facilities proved to be totally ineffective, causing significant economic cost and considerable CO2 emissions into the atmosphere.

Architectural description

The house dates from the late 80s and is in good condition, so the only architectural reform is done in the kitchen, in order to adapt its conditions to a continued use of housing. It is a large house that has traditional bioclimatic strategies such as the high thermal inertia of its stone walls and the existence of local wood fireplaces.

Energy consumption

Primary energy need : 117,04 kWhpe/m².year
Primary energy need for standard building : 133,41 kWhpe/m².year

Calculation method :

CEEB : 0.0001

Initial consumption : 133,41 kWhpe/m².year

Envelope performance

Envelope U-Value : 1,58 W.m^-2.K^-1

Systems

Heating system :

Water radiator
Wood boiler
Solar thermal

Hot water system :

Solar Thermal
Wood boiler

Cooling system :

No cooling system

Ventilation system :

Double flow heat exchanger

Renewable systems :

Solar photovoltaic
Solar Thermal
Micro wind
Biomass boiler

Renewable energy production : 100,00 %

Smart Building

Users’ opinion on the Smart Building functions : Facilities include remote control via web, so that the user can access it at any time and know the consumption of each of the energies in both real-time and historical.

GHG emissions

GHG in use : 2,03 KgCO₂/m²/year

Methodology used : Final energy conversion to CO2 emissions (not densified biomass).

Indoor Air quality

The air renewal system is modified by including air renewal equipment with heat recovery and complying to current regulations filters.

Product

Product category : Génie climatique, électricité / Chauffage, eau chaude

Biomass boiler with the possibility of burning wood logs up to half a meter, forest residues, wood chips and briquettes.
Comfortable filling with wood logs and overturned by a gate with pneumatic filling device.
Combustion control with lambda probe, including lift and return temperature waste heat utilization.
Long maintenance intervals thanks to large ash compartments.