Energy saving design

Green Roof

Just beautiful...

Energy efficient lighting

CND recently realized an energy efficient E-lighting system in a production / logistics facility. All products and the system’s communications comply with the DALI protocol, which permits devices to be individually addressed.

E-light ensures the following functional blocks works:

·Control of groups and scenes

·Visualization of  functional connections

·Daylight harvesting

·Automatic presence and sequence control

·Display of resources

·Real time clock functionality

Each lighting fixture is equipped with 4 T5-lamps and highly efficient reflectors. This type of lamp is similarly efficient as modern LED lamps, but longer lasting and far more economic.

Heat Recovery

CND recently realized several heat recovery systems in order to save energy and significantly reduce the amount of unused heat released.

Rotary heat exchanger in air handling unit (AHU)

The HVAC system used a high quality air handling unit imported from Germany. This air handling unit is fitted with a heat recovery wheel which pre-conditions incoming air by using the energy from outgoing (exhaust air), resulting in significant energy savings.

Heat recovery from air compressors

Almost all production facilities use compressed air and are therefore equipped with air compressors. Air compressors use electricity to compress air and as a by-product a lot of heat is generated. More than 90% of the electrical energy is actually converted into heat! By using heat recovery units, CND harnesses this heat and uses it to heat domestic hot water for the showers in the locker rooms. This reduces the amount of gas or electricity that would be conventionally used for this purpose.

Heat recovery from process exhaust air

Many production facilities use processes which produce warm or even hot exhausts. CND installed a system in which hot exhaust air is first filtered and then run via a heat exchanger. The heat picked up by the heat exchanger is transferred to fluid and used in the production facilities heating system, again reducing the energy demand.

Superior Insulation & Great Looks

CND recently realized a production hall facade in a manner unusual for China. First, the skirt wall was installed (yes, installed, not built) by use of pre-fabricated concrete parts. These are factory made with insulation installed between two layers of concrete slab. The controlled factory environment these parts come from ensure high quality and good appearance. The parts were merely painted and required no further plastering or putty application. Other advantages were the speedy installation time and the avoidance of the mess that accompanies on-site masonry work.

Above the skirt wall, we used high quality sandwich panels, each insulated with mineral wool of a density of 120 kg/cbm in a thickness of 150mm. The sandwich panels not only look great, but are also highly resistant against corrosion, thanks to being not only coated, but also hot dip galvanized. They also have superior fire resistance qualities. Sandwich panels are THE choice for exclusive, representative facilities.

Industrial Underfloor Heating

CND recently realized an Underfloor Heating System in the Boysen Production and Logistics facility in Langfang, near Beijing. Under Floor Heating and Cooling has distinct advantages over conventional methods such as the use of air blowers. For one, Underfloor Systems work with lower temperature heating / cooling sources, which are more efficient than the high temperature sources used by conventional systems. The pipes of the Underfloor System are installed directly on the lower rebar layer of the floor slab, which eliminates the need for further support.

It is in the nature of Underfloor Systems that a uniformly distributed temperature profile is created and that the air movement is thereby reduced. Last but not least, the temperature is delivered where it counts, at the bottom of the production hall, and not at the top, where there are no people present. Air blowers often use a lot of energy for fans to blow hot air downward to the people, while it (the hot air) naturally rises to the top of the hall where it is wasted.

Together with our supplier and partner, Uponor, the system was realized successfully and to the full satisfaction of our client.