Ventilating air conditioning apparatus
An energy-efficient, space-saving, low-cost, waste-heat-utilizing ventilating air conditioning apparatus uses a honeycomb rotor having a function of adsorbing or absorbing contaminants such as carbon dioxide and VOC gas. The honeycomb rotor is disposed in a rotor rotating device having at least a processing zone and a re-generation desorption zone. Air to be processed is passed through the processing zone to remove contaminants such as carbon dioxide to produce supply air. Water is directly sprayed or dropped into a heat exchanger provided at an entrance of the re-generation desorption zone to evaporate the generated water film by heating. The generated saturated steam is introduced for desorbing carbon dioxide and pollutants, and the stream is discharged the stream outdoors. The ventilating air conditioning apparatus can operate without the energy loss associated with ventilation.
1. A ventilating air conditioning apparatus comprising:
a honeycomb rotor having a sorbent that sorbs carbon dioxide and contaminants;
a rotor rotating device having at least a processing zone and a re-generation/desorption zone, the honeycomb rotor being disposed in the rotor rotating device; and
a heat exchanger provided at an entrance of said re-generation/desorption zone, wherein
the ventilating air conditioning apparatus is configured such that air to be processed is passed through said processing zone to remove carbon dioxide and contaminants and produce supply air,
the ventilating air conditioning apparatus is configured such that water is directly sprayed on or dropped into the heat exchanger provided at the entrance of said re-generation/desorption zone, to form a water film on the heat exchanger, to evaporate the water film with heat from the heat exchanger, and to generate saturated steam,
the ventilating air conditioning apparatus is configured such that the saturated steam is introduced to the re-generation/desorption zone to desorb the carbon dioxide and contaminants and produce a discharge stream that is vented outdoors, and
the ventilating air conditioning apparatus is configured such that said honeycomb rotor is in a wet state due to at least one of moisture absorption and water condensation, when said honeycomb rotor moves from the re-generation/desorption zone to the processing zone by rotation of the honeycomb rotor.
2. The ventilating air conditioning apparatus according to claim 1 , wherein
the ventilating air conditioning apparatus is configured such that excess water is sprayed on or dropped into the heat exchanger such that water exits from said heat exchanger, and
a pump recirculates water exiting from said heat exchanger such that the water is again sprayed on or dropped into said heat exchanger.
3. The ventilating air conditioning apparatus according to claim 1 , wherein said heat exchanger is a warm water coil.
4. The ventilating air conditioning apparatus according to claim 3 , wherein
the ventilating air conditioning apparatus is configured such that excess water is sprayed on or dropped into the heat exchanger such that water exits from said heat exchanger, and
a pump recirculates water exiting from said heat exchanger such that the water is again sprayed on or dropped into said heat exchanger.
5. The ventilating air conditioning apparatus according to claim 1 , wherein said heat exchanger is a condenser coil of a direct expansion heat pump.
6. The ventilating air conditioning apparatus according to claim 5 , wherein
the ventilating air conditioning apparatus is configured such that excess water is sprayed on or dropped into the heat exchanger such that water exits from said heat exchanger, and
a pump recirculates water exiting from said heat exchanger such that the water is again sprayed on or dropped into said heat exchanger.
7. The ventilating air conditioning apparatus according to claim 5 , wherein
the heat pump has an evaporator and the condenser coil, and
the evaporator of the heat pump is positioned upstream from the processing zone to cool and dehumidify the air to be processed before the air to be processed is passed through the processing zone.
8. The ventilating air conditioning apparatus according to claim 1 , wherein
said heat exchanger is a plate sensible heat exchanger having a high temperature side and a low temperature side,
exhaust gas is passed through the high temperature side, and
the water is directly sprayed on or dropped into the low temperature side to generate the saturated steam.
9. The ventilating air conditioning apparatus according to claim 8 , wherein
the ventilating air conditioning apparatus is configured such that excess water is sprayed on or dropped into the heat exchanger such that water exits from said heat exchanger, and
a pump recirculates water exiting from said heat exchanger such that the water is again sprayed on or dropped into said heat exchanger.
10. The ventilating air-conditioner according to claim 1 , wherein a heater is provided at a rear stage of the heat exchanger to reheat the saturated steam used to desorb carbon dioxide and contaminants, the heater being provided between the heat exchanger and said honeycomb rotor.
11. The ventilating air conditioning apparatus according to claim 1 , wherein
a purge zone is provided downstream from the re-generation/desorption zone in a rotating direction of the honeycomb rotor, on an outlet side of the re-generation/desorption zone, the purge zone being supplied with air, and
an exhaust is provided on a side of the honeycomb rotor opposite to the purge zone, the exhaust having an exhaust blower to exhaust both air supplied to the purge zone and saturated steam introduced to the re-generation/desorption zone, using suction.
12. The ventilating air conditioning apparatus according to claim 11 , wherein
the ventilating air conditioning apparatus is configured such that the air supplied to the purge zone is a portion of the supply air that is produced by passing the air to be processed through the processing zone.
13. The ventilating air conditioning apparatus according to claim 1 , wherein the ventilating air conditioning apparatus is configured such that the saturated steam introduced to the re-generation/desorption zone is steam at atmospheric pressure and at 40 to 100° C.
14. The ventilating air conditioning apparatus according to claim 1 , wherein the honeycomb rotor carries a solid amine carbon dioxide sorbent having a particle diameter of 0.1 mm or less.
15. The ventilating air conditioning apparatus according to claim 1 , wherein the honeycomb rotor carries activated carbon in which an amine type sorbent is impregnated in the pores.
16. The ventilating air conditioning apparatus according to claim 1 , wherein the ventilating air conditioning apparatus is configured such that the contaminants sorbed by the sorbent comprise volatile organic compound (VOC) gas contaminants.