Sustainable renovation of building LB

IndustryParkKleefse Waard plans to renovate the LB building in a sustainable manner. The building covers approximately 9.500 m2 GFA of floor space, has four floors and is over 20 metres high.

The building has an obsolete heating unit and the window frames and glazing need replacement. IPKW wants to make the LB building suitable for the accommodation of several EMT (Energy and Environmental Technology) related companies.

IPKW wants to turn the LB building into a sustainable building, preferably zero energy, with an energy balance of 0 throughout the year. Energy from fossil fuels can be purchased but should be fully compensated with the production of sustainable energy. Therefore, it is necessary to optimally reduce the power demand, so that as little as possible sustainable energy has to be generated. This takes shape in the trias energetica model that has been used.

Trias energetica 

The methodology of the Trias Energetica model is based on the fact that the lower the power demand of the building, the simpler it is to reach power neutrality. From this emerges the importance of a proper embedding of economy measuresand sustainable energy from the early beginning of the design process and an integral approach.

1. First of all, the need for energy must be reduced as much as possible. Therefore, companies should make sure to require as little energy as possible, so that it does not need to be generated. (For example: By choosing a solar-oriented manner of building and by applying good insulation, the demand for energy for heating and cooling can be reduced as much as possible.)

2. The remaining power demand of the building must then be generated with sustainable sources as often as possible. (For example: By using solar panels, and/or by making use of locally present residualheat or bottom heat in combination with low temperature heating, the energy from local sustainable sources can be efficiently used to provide in energy need.)

3. When the remaining power demand cannot be generated in a sustainable manner, then fossil energy must be used, but this must be done in a most effective manner. (For example: By making use of technology that can efficiently generate energy, such as a HR heating unitor an efficient CHP plant.)



With the preservation of the building, several specific characteristics of the building are used. This is done according to the so-called Osdit model.

O = Omgeving (Surroundings)

The building is situated in such a way that we can use solar heat and also the river Rhine. Reasearch has been carried out into how the use of (passive) solar energy is possible for heating and optimum use of daylight. An innovative climate active facade construction, by means of heat recuperation in an air-conditioning unit can, through compressed air, be used for heating the building. Research has also been carried out with regard to whether the water of the river Rhine can be used as a relatively stable source for cooling in the summer and heating in the winter.

S = Schil (Casco)

The loss of warmth with regard to the casco of the building, is limited, for example by good insulation and high-qualityglazing systems.

D = Drager of gebouwconstructie (Carrier of the building construction)

We deal with a massive concrete building construction which keeps a reasonably stable temperature, which can be used as a buffer, for example for cooling in the summer and for heating in the winter.

I = Inbouwwanden (Recessed walls)

Recessed walls can be used to optimally divide cool air and heat.

T = Techniek (technique)

The intention is to use technical systems which will suit the heavy (mass) character of the building. Smart systems will be applied that require little or no energy. The proposed airconditioning system requires, except for pump and ventilation power, no additional heat or cold generated by fuel or electric energy. Also, we apply as many systems as possible thus creating an easy transition to the use of electric energy. Because of the very low temperature systems, the heat pump application can be used here very efficiently.

After power demand has been reduced optimally, can the remaining amount of power be generated by means of, for example, PV cells?


Finally, a Breeam scan will be carried out. Breeam is an internationally supported measuring tool for sustainable buildings. An independent institute will assess the renovation on several points. These points are listed below:

  1. Management, aimed at a clear outline of the process with the right contestants;
  2. Health, designing a healthy and comfortable building;
  3. Energy use, aimed at saving and generating energy in a sustainable manner;
  4. Transport, facilities for public transport, bicycles and safety in the vicinity of the building in relation to parking;
  5. Water, aimed at being economical with drinking water;
  6. Materials, have materials been produced in a sustainable manner, are they robust and reusable?
  7. Waste, are there possibilities for recycling?;
  8. Use of land and ecology, does the project have a large “footprint” or do measurements need to be taken with regard to compensation of nature and the limitation of land use?;
  9. Contamination, can possible contamination, such as light, sound or coolants, be prevented?
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