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The CES-Solaire solar air heating system works on a simple philosophy; the sun’s energy is free and can be used for heating. As opposed to conventional heating, such as natural gas, electricity and propane, there are no tariffs or demand rates associated with the sun. Whenever the sun’s energy is available, it can be captured and harvested to effectively preheat the fresh air entering a supermarket/building.

Ventilation fresh air is a requirement for all buildings. The fresh air is required for the health of the occupants and the proper pressurization of the building. Consequently, the HVAC system must condition this fresh air, as it is essential that the fresh air be properly treated prior to supply. Throughout the winter months, the cool, dry fresh air entering the HVAC unit must be heated in order to sustain a comfortable environment within the building. The energy required to raise the temperature of the cool air becomes costly when the heating season is long, and conventional heating is used to heat the building.

Reduce the costs associated with heating by preheating the fresh air prior to entering the HVAC unit. By delivering an air temperature warmer than the ambient, the conventional heating system has a smaller temperature rise. The smaller temperature rise results in economies that directly reduce heating costs.

The solar collector captures the energy from the sun. As the cool, dry winter air passes between the solar collector and the building, the energy from the sun is conveyed to the air by means of heat transfer. Naturally, the solar collector is warmer than the ambient, so the collector easily transfers its collected heat. The turbulence triangles guide the passing air throughout the collector.

Before the outdoor air reaches the HVAC unit, it must pass through the CES-Solaire system. To ensure maximum heat transfer, the fresh air is drawn in from the bottom of the solar collector. This cold, winter air begins to rise in temperature as it travels through the collector.

The velocity and direction of the air within the solar collector are extremely important. Even the energy captured at the top of the solar collector must be used. For this reason, the CES-Solaire system is custom built for each application. This ensures that the targeted performance will be met.

In the drawing above, a CES Sahara Express^TM Dual-Path Dehumidification HVAC Unit is working in unison with a CES-Solaire Heating System. Throughout the winter months, the fresh air damper of the CES Dual-Path HVAC unit is closed, for the unit is taking the required fresh air from the CES-Solaire system. The dampers located within the ventilation ductwork and the ductwork, joining the two systems together, makes it possible to isolate either system.

As the temperature begins to drop, the heating season begins. When there is a call for heating and no call for dehumidification (occupied periods of the building), the two dampers located in the ductwork open. At the same time, the fresh air damper of the CES Dual-Path HVAC Unit closes. Therefore, the fresh air required for the building is supplied through the CES-Solaire system.

The treated fresh air, now warmer than the ambient temperature, travels to the building’s ventilation return air path. In this scenario, the building is a supermarket, and the return air path is the cool, dry air of the refrigerated display cases. This cool air of the return air path mixes with the treated fresh outdoor air. It is important to note that mixing of the outdoor fresh air and the return air happens within the ventilation ductwork, prior to the CES Dual-Path HVAC Unit.

On clear, sunny winter days, the collector reaches great efficiencies at noon, for this is the time when most energy is available. The building saves in heating costs by using less of its conventional heating system throughout daytime periods in the winter.

The CES-Solaire Heating System requires a southern orientation to ensure adequate availability of the sun’s energy. A southern orientation receives more energy from the sun throughout winter periods than the other orientations.

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