Systems and methods for circulating air in an enclosed environment are disclosed. In some embodiments, the system includes an inlet to receive air from outside of the enclosed environment and an air handling unit coupled to the inlet and also configured to receive circulated air from the enclosed environment. The air handling unit can be configured to affect a temperature of at least one of the received outside air and the received circulated air. Based on the received outside air and the received circulated air, the air handling unit can be further configured to generate air for supplying to the enclosed environment.

The present disclosure relates to a multilayer fabric media comprising a non-woven membrane of fibers comprising at least one polymer in combination with at least one photoreactive agent mounted on a woven or non-woven substrate and coated with a light transmissible protective layer, to methods of forming such multilayer fabric media, and to articles of manufacture made therewith.

The present specification relates to a system for managing the condition of air in an enclosed environment comprising a flow path adapted to circulate a flow of air through said enclosed environment, said flow of air comprising at least one of a first portion comprising a gas comprising oxygen and a second portion comprising indoor air from said enclosed environment, said flow path further comprising means for selectively providing the portions, an air processing assembly adapted to receive said flow of air, said means comprising at least a first and a second air processing element and means for selectively coupling said first and second elements to said flow path and a control system adapted to determine said first portion of gas comprising oxygen and said second portion of indoor air from said enclosed environment and control said means for selectively coupling the air processing elements to said flow path.

Systems and methods for circulating air in an enclosed environment are disclosed. In some embodiments, the system includes an inlet to receive air from outside of the enclosed environment and an air handling unit coupled to the inlet and also configured to receive circulated air from the enclosed environment. The air handling unit can be configured to affect a temperature of at least one of the received outside air and the received circulated air. Based on the received outside air and the received circulated air, the air handling unit can be further configured to generate air for supplying to the enclosed environment.

An environment control system utilizes oxygen and humidity control devices that are coupled with an enclosure to independently control the oxygen concentration and the humidity level within the enclosure. An oxygen depletion device may be an oxygen depletion electrolyzer cell that reacts with oxygen within the cell and produces water through electrochemical reactions. A desiccating device may be g, a dehumidification electrolyzer cell, a desiccator, a membrane desiccator or a condenser. A controller may control the amount of voltage and/or current provided to the oxygen depletion electrolyzer cell and therefore the rate of oxygen reduction and may control the amount of voltage and/or current provided to the dehumidification electrolyzer cell and therefore the rate of humidity reduction. The oxygen level may be determined by the measurement of voltage and a limiting current of the oxygen depletion electrolyzer cell. The enclosure may be a food or artifact enclosure.

The invention concerns a method of adjusting a room air in a first room wherein the room air is supplemented continuously or at recurring intervals of time by nitrogen or a nitrogen-bearing, carbon dioxide-poor gas mixture in such a way that the proportion of oxygen in the room air is less than 20.9% by volume and the proportion of carbon dioxide in the room air is less than 1% by volume, wherein at the same time at least a slight overpressure in relation to an outside atmosphere surrounding the room is set in the room.

An air conditioning system (1) includes a carbon dioxide separation device (20) configured to separate some or all of carbon dioxide from air that contains carbon dioxide, an electrolytic reduction device (30) configured to generate a hydrocarbon and oxygen using the separated carbon dioxide as a raw material, and an oxygen supply amount control device (40) configured to supply some or all of the oxygen generated by the electrolytic reduction device (30) to a space to be processed (10).

An air conditioning system (1) includes a carbon dioxide separation device (20) configured to separate some or all of carbon dioxide from air that contains carbon dioxide, an electrolytic reduction device (30) configured to generate a hydrocarbon and oxygen using the separated carbon dioxide as a raw material, and an oxygen supply amount control device (40) configured to supply some or all of the oxygen generated by the electrolytic reduction device (30) to a space to be processed (10).

An HVAC system for a single unit in a multi-unit building, the multi-unit building having a riser stack wherein a closed loop fluid flow path thermally connects the HVAC system in thermal communication with the riser stack, the single unit having a first room and a second room, the HVAC system comprises a first heat exchanger in thermal communication with the closed loop fluid flow path, the first heat exchanger provides temperature modulation to the first room and a second heat exchanger in thermal communication with the closed loop fluid flow path, the second heat exchanger provides temperature modulation to the second room.

An air purifier system for removing particulate matter and gaseous particles from polluted indoor air is provided. The air purifier system comprises a filtration chamber having an amount of water. The filtration chamber receives the polluted indoor air with the polluted indoor air traveling through the water leaving behind particulate matter and gaseous particles in the water and cleaned air exiting the filtration chamber. An electrolyzer continuously electrolyzes distilled water to generate hydrogen molecules and oxygen molecules in an electrolysis process with the oxygen gases added to the cleaned air exiting the filtration chamber. A fuel cell receives the hydrogen gases from the electrolyzer for generating electricity with the fuel cell electrically connected to at least the electrolyzer for at least partially powering the electrolyzer. The cleaned air exits the filtration chamber is free from particulate matter and gaseous particles.