Bachflat

Tilburg, Netherlands

Multi-family house | 354 sqm installation

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Project Summary

Description

Social housing association WonenBreburg realised a 354 m² collective solar thermal system on the roof of one of their apartment buildings with 16 floors and 256 dwellings. The system is placed as part of an overall renovation of the building. Small individual gas-fired kitchen tap water heaters that emitted exhaust gases into the dwellings have been replaced by a central solar hot water system and the ventilation system has been improved. Furthermore the mostly senior tenants were offered freedom of choice between several packages for renovation of the bathroom, kitchen and toilet. The realisation of this system fits in WonenBreburg’s policies and in the energy covenant agreements closed between the social housing associations in Tilburg and the municipality.

Building
Type of building	Multi-family house
Number of users / dwellings, floors	256 dwellings 16 floors
Year of construction	1971
Total effective area (heated)	25,088 m²
Hot tap water consumption (measured/estimated)	4,672 m³/a (calculated)
Whole energy consumption for tapwater heating purpose after CSTS implementation	523,264 kWh/a
System engineering
Year of construction of CSTS	2005
Type of collectors	Flat plate collectors
Thermal power	248 kW_therm.
Aperture area of collectors^*)	354 m^₂
Buffer storage	9 m³
Hot tap water storage	not available
Total capacity of boilers with energy source	not availbale (district heating)
Type of hot tap water heating	Centralised
Type of heating system	Centralised
Costs
Total cost solar system	272,000 Euro
Cost of the CSTS / gross area of collectors	768 Euro/ m²
Subsidies	11 %
Output
Output of solar heat^**)	162,250 kWh/a
Reduction of final energy^***)	232,000 kWh/a
CO_2-emissions avoided	43 t CO₂/a
Solar performance guarantee	No
^) Aperture area = light transmitting area of the front glass ^) measured, between storage and piping to taps (solar system output) ^**) related to the measured output mentioned before