A cooling or heating system creating an open temperature-controlled zone for personnel, the system having HVAC equipment for producing and delivering cooled or heated air, a lower air outlet disposed in a deck member, an upper air outlet disposed in a wall member, and a central air intake disposed between the lower and upper air outlets, whereby conditioned air expelled from the lower and upper air outlets is recycled through the central air intake and HVAC equipment.

A liquid desiccant air conditioning system comprises an energy exchange unit comprising a sump and a plurality of media pads positioned above the sump, first, second, and third desiccant outlets fluidly connected to the sump, and at least one retractable gate positioned above the sump, configured to partition the sump into at least first and second compartments, wherein the first compartment is fluidly connected to the first desiccant outlet and the second compartment is fluidly connected to the second desiccant outlet, and wherein effective volumes of the first and second compartments can be modified by opening and closing the at least one retractable gate. A method of controlling desiccant circulation in a liquid desiccant air conditioning system is also described.

A liquid desiccant air conditioning system comprises an energy exchange unit comprising a sump and a plurality of media pads positioned above the sump, first, second, and third desiccant outlets fluidly connected to the sump, and at least one retractable gate positioned above the sump, configured to partition the sump into at least first and second compartments, wherein the first compartment is fluidly connected to the first desiccant outlet and the second compartment is fluidly connected to the second desiccant outlet, and wherein effective volumes of the first and second compartments can be modified by opening and closing the at least one retractable gate. A method of controlling desiccant circulation in a liquid desiccant air conditioning system is also described.

A liquid desiccant air conditioning system comprises an energy exchange unit comprising a sump and a plurality of media pads positioned above the sump, first, second, and third desiccant outlets fluidly connected to the sump, and at least one retractable gate positioned above the sump, configured to partition the sump into at least first and second compartments, wherein the first compartment is fluidly connected to the first desiccant outlet and the second compartment is fluidly connected to the second desiccant outlet, and wherein effective volumes of the first and second compartments can be modified by opening and closing the at least one retractable gate. A method of controlling desiccant circulation in a liquid desiccant air conditioning system is also described.

[Object] It is an object of the present invention to provide a duct type air conditioning ventilation system in which harmful materials such as dust, mold and bad smell do not are not attached to deposited on the air conditioning duct, and maintenance such as exchanging and cleaning of the duct is unnecessary even if the system is continuously operated for a long term.

[Solving Means] Air sucked from a suction portion 44 through a circulation passage is cleaned by a filter portion A, a portion of the sucked air is air-conditioned and cleaned by an air conditioning portion 16 and a filter portion B, blown-out air which is blown out from the air conditioning portion 16 and a remaining portion of the portion of the sucked air are mixed by a plurality of air-blowing portions 13 in a mixing portion 85, conditioned air within about 5 K at the time of the cooling operation and within about 10 K at the time of the heating operation is further cleaned by the plurality of air-blowing portions 13 with respect to temperature of air around the air conditioning ducts 30, 31, 32, 33 and 34, and the air is sent into the air conditioning ducts 30, 31, 32, 33 and 34 toward the outlet, thereby air-conditioning and air-cleaning in a room.sup.20, 21 and a heat resistant space, the outdoor air introduction passage is provided with an introduction fan and a filter, introduced outdoor air is cleaned, the indoor air exhausting passage is provided with an exhaust fan, and at least one of a portion of air in the circulation passage and a portion of air accumulated in a building 2 is discharged to outdoor.

Systems and methods for optimizing system efficiency and demand response performance for variable-fan-speed and variable-capacity air handling systems. A controller is provided selectively controlling building-zone dampers in response to acquired operational parameters, such that air flows through selected duct sections and not through the entire duct system simultaneously, wherein design velocity in each duct section is roughly maintained whenever the duct section is being used. Exemplary operational parameters include compressor speed, cooling capacity, heating capacity, fan speed, duct-section air flow, zone air flow, duct-inlet temperature, duct-outlet temperature, and duct-zone temperature.

Systems and methods for optimizing system efficiency and demand response performance for variable-fan-speed and variable-capacity air handling systems. A controller is provided selectively controlling building-zone dampers in response to acquired operational parameters, such that air flows through selected duct sections and not through the entire duct system simultaneously, wherein design velocity in each duct section is roughly maintained whenever the duct section is being used. Exemplary operational parameters include compressor speed, cooling capacity, heating capacity, fan speed, duct-section air flow, zone air flow, duct-inlet temperature, duct-outlet temperature, and duct-zone temperature.

An apparatus, system, and methods for measuring environmental parameters are disclosed. The apparatus, system and methods can be used for a variety of applications, including HVAC air balancing and building commissioning. The system includes a variety of wireless sensing modules and wearable modules for control. display, and storage. Parameters measured include air and water temperature, pressure. velocity, and flow. Also included are sensors for light intensity, CO concentrations, and CO2 concentrations.

A ventilation unit includes a housing including a plurality of walls defining an interior space. The housing may be mounted to a structure, such as a cabinet, using a plurality of primary mounts. A mount is coupled to the housing to mount the housing to the structure. The mount may be used prior to installation of the primary mounts.

A motor control apparatus may relate to a motor control apparatus, an air conditioning system, and a constant airflow control method of a fan motor control apparatus of an indoor unit, in which table information on an airflow command value corresponding to a reception pattern or type of a signal is prestored to determine a corresponding airflow command value from the table information according to a result of receiving the signal from a central control apparatus so as to control an operation of a fan motor.