A growing system (e.g., greenhouse) is equipped with a mixing box that features a pair of PLC-controlled cooling coils and a heating coil in series. PLC regulated inputs include air and CO2-containing exhaust. The cooling coils in series facilitate condensation to maintain relative humidity in an ac
A growing system (e.g., greenhouse) is equipped with a mixing box that features a pair of PLC-controlled cooling coils and a heating coil in series. PLC regulated inputs include air and CO2-containing exhaust. The cooling coils in series facilitate condensation to maintain relative humidity in an acceptable range. At least two stages of cooling are necessary to achieve sufficient condensation and temperature reduction. Condensate is collected for reuse. The heating coil heats cooled CO2-enriched air to an acceptable temperature for plant health. The output is a temperate low relative humidity CO2-enriched stream optimal for plant health.
대표청구항▼
1. A growing system mixing box comprising: a housing through which gaseous fluids flow;a plurality of inlets to the housing, and an outlet from the housing, the outlet being spaced apart from the plurality of inlets, the plurality of inlets including a CO2-containing exhaust inlet;a plurality of coo
1. A growing system mixing box comprising: a housing through which gaseous fluids flow;a plurality of inlets to the housing, and an outlet from the housing, the outlet being spaced apart from the plurality of inlets, the plurality of inlets including a CO2-containing exhaust inlet;a plurality of cooling coils, in series, disposed between the plurality of inlets and the outlet;a heating coil, in series with the plurality of cooling coils, the heating coil being disposed between the plurality of cooling coils and the outlet. 2. The growing system mixing box of claim 1, wherein the plurality of inlets further include a fresh air inlet and a recirculation air inlet. 3. The growing system mixing box of claim 2, wherein the CO2-containing exhaust inlet is fluidly coupled to one of a natural gas engine and a natural gas boiler. 4. The growing system mixing box comprising of claim 1, wherein at least one of the plurality of cooling coils includes a cooling coil inlet line and a cooling coil outlet line, the cooling coil inlet line supplying chilled water from a chilled water source, and the cooling coil outlet line returning chilled water to the chilled water source. 5. The growing system mixing box comprising of claim 1, wherein at least one of the plurality of cooling coils includes a cooling coil inlet line and a cooling coil outlet line, the cooling coil inlet line supplying refrigerant from a refrigeration source, and the cooling coil outlet line returning refrigerant to the refrigeration source. 6. The growing system mixing box comprising of claim 1, wherein the heating coil includes an inlet line and an outlet line, the inlet line supplying heated water from a heated water source, and the outlet line returning heated water to the heated water source. 7. The growing system mixing box of claim 1, further comprising a drain pan disposed beneath the plurality of cooling coils, the drain pan being fluidly coupled to a drain line, the drain line being fluidly coupled to a container. 8. The growing system mixing box of claim 1, further comprising a controllable fan within the housing and a controller operably coupled to and controlling operation and volumetric flow rate of the controllable fan. 9. The growing system mixing box of claim 1, further comprising a plurality of dampers, including at least one damper controlling flow through each inlet of the plurality of inlets, the at least one damper comprising an electrically actuated damper, a controller operably coupled to and controlling operation of each of the plurality of dampers. 10. The growing system mixing box of claim 9, further comprising a controller operably coupled to and controlling operation of each of the plurality of valves. 11. The growing system mixing box of claim 9, each cooling coil of the plurality of cooling coils being water-cooled. 12. The growing system mixing box of claim 9, each cooling coil of the plurality of cooling coils being refrigerant-cooled. 13. The growing system mixing box of claim 9, at least one cooling coil of the plurality of cooling coils being water-cooled, and at least one other cooling coil of the plurality of cooling coils being refrigerant-cooled. 14. The growing system mixing box of claim 1, further comprising a plurality of valves, including at least one valve controlling flow through each cooling coil of the plurality of cooling coils, and at least one valve controlling flow through the heating coil, each valve of the plurality of valves comprising an electrically actuated valve. 15. The growing system mixing box of claim 1, wherein the plurality of inlets include a fresh air inlet, a CO2-containing exhaust inlet, and a recirculation air inlet, and further comprising a growing space, the growing space containing plants, the outlet being fluidly coupled to the growing space, and the recirculation air inlet being fluidly coupled to the growing space, flow proceeding from the outlet into the growing space and into the recirculation air inlet. 16. The growing system mixing box of claim 15, further comprising a controller, and a plurality of sensors in the growing space, the plurality of sensors being operably coupled and providing input to the controller. 17. The growing system mixing box of claim 16, the plurality of sensors in the growing space including a humidity sensor, a CO2 sensor, a temperature sensor and a light sensor, a plurality of setpoints stored on the controller, the plurality of setpoints including setpoints for daylight and setpoints for nighttime, daylight setpoints being applied when the light sensor senses daylight lighting conditions, and nighttime setpoints being applied when the light sensor does not sense daylight lighting conditions. 18. The growing system mixing box of claim 17, further comprising a plurality of dampers, including at least one damper controlling flow through each inlet of the plurality of inlets, the at least one damper comprising an electrically actuated damper, and the controller operably coupled to and controlling operation of each of the plurality of dampers. 19. The growing system mixing box of claim 18, further comprising a plurality of valves, including at least one valve controlling flow through each cooling coil of the plurality of cooling coils, and at least one valve controlling flow through the heating coil, each valve of the plurality of valves comprising an electrically actuated valve, and the controller operably coupled to and controlling operation of each of the plurality of valves. 20. The growing system mixing box of claim 19, the plurality of setpoints including daytime and nighttime setpoints for temperature, relative humidity and CO2 concentration, each of the plurality of setpoints comprising a range, and the controller controlling the plurality of valves and plurality of dampers to maintain output from each of the humidity sensor, the CO2 sensor, and the temperature sensor within an applicable one of the setpoints.
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이 특허에 인용된 특허 (5)
Shelor, F. Mack, Climate control system and method for a greenhouse.
Landstrom D. Karl (903 Neil Ave. Columbus OH 43215) Wilkinson William H. (3089 Oakridge Rd. Columbus OH 43221), Method and system for controlling the environment in a greenhouse.
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