Solar City Plan-les-Ouates

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1990 to 2001

cité solaire plan-les-ouates

In 1990, the commune of Plan-les-Ouates, at the gates of Geneva, committed itself to the realization of a P+D (pilot and demonstration) project for its Pré-du-Camp neighborhood: a group of rental and commercial buildings that meet an ecological imperative. This solar city includes a total of 220 apartments and a dozen shops.

The energy concept recommended, accepted and realized by ERTE consisted in the installation of 1’700m² of solar roofs, curved thermal solar collectors which also play the role of a roof (according to the principle of multifunctionality, hence saving 300’000 CHF), a Canadian well to preheat the air in winter and a “natural air conditioning” in summer with the DFV (double flow ventilation), two heat accumulators totalling 100m³ to conserve the captured solar heat and a regulation system optimizing the functioning of the whole installation.

The result lived up to our expectations, since in this Solar City of Plan-les-Ouates, we observe a consumption of 60% lower than the Swiss average (at the time), which represents an annual saving of 14’000 liters of fuel oil or an energy expenditure index of 250MJ/m²/year (the Swiss average is 725 in 2012).

In 1995, ERTE completed this project. The SUNERGIE® system used was installed almost 30 years ago and is still in operation today. The solar thermal collection of curved roofs was a first for Switzerland and is suitable for both large-scale installations (villas) and large-scale complexes.

ERTE has translated this project into low energy consumption, minimal environmental impact and a bearable extra cost.

This achievement earned ERTE the 1995 Solar Prize in the category of planners.

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Solar City Plan-les-Ouates – 1990 to 2001

cité solaire plan-les-ouates

In 1990, the commune of Plan-les-Ouates, at the gates of Geneva, committed itself to the realization of a P+D (pilot and demonstration) project for its Pré-du-Camp neighborhood: a group of rental and commercial buildings that meet an ecological imperative. This solar city includes a total of 220 apartments and a dozen shops.

The energy concept recommended, accepted and realized by ERTE consisted in the installation of 1’700m² of solar roofs, curved thermal solar collectors which also play the role of a roof (according to the principle of multifunctionality, hence saving 300’000 CHF), a Canadian well to preheat the air in winter and a “natural air conditioning” in summer with the DFV (double flow ventilation), two heat accumulators totalling 100m³ to conserve the captured solar heat and a regulation system optimizing the functioning of the whole installation.

The result lived up to our expectations, since in this Solar City of Plan-les-Ouates, we observe a consumption of 60% lower than the Swiss average (at the time), which represents an annual saving of 14’000 liters of fuel oil or an energy expenditure index of 250MJ/m²/year (the Swiss average is 725 in 2012).

In 1995, ERTE completed this project. The SUNERGIE® system used was installed almost 30 years ago and is still in operation today. The solar thermal collection of curved roofs was a first for Switzerland and is suitable for both large-scale installations (villas) and large-scale complexes.

ERTE has translated this project into low energy consumption, minimal environmental impact and a bearable extra cost.

This achievement earned ERTE the 1995 Solar Prize in the category of planners.