Abstract: A method for continuously removing a particular type of gas molecules (“gas molecules”) from a gas stream includes selecting a liquid having an affinity for the gas molecules to be removed, and providing the selected liquid to each of a first and second mat, each mat formed from a plurality of fibers having the ability to retain the selected liquid within longitudinally extending channels having longitudinally extending openings against moving into the space between the individual fibers, the mats in fluid communication therebetween with the selected liquid. The method includes directing the gas stream through a portion of the first mat into contact with the selected liquid along the longitudinally extending openings whereby the selected liquid absorbs the gas molecules, and directing a second gas through a portion of the second mat so that the gas molecules, absorbed by and disbursed throughout the selected liquid, are stripped and carried away.

Abstract: A method for continuously removing a particular type of gas molecules (“gas molecules”) from a gas stream includes selecting a liquid having an affinity for the gas molecules to be removed, and providing the selected liquid to each of a first and second mat, each mat formed from a plurality of fibers having the ability to retain the selected liquid within longitudinally extending channels having longitudinally extending openings against moving into the space between the individual fibers, the mats in fluid communication therebetween with the selected liquid. The method includes directing the gas stream through a portion of the first mat into contact with the selected liquid along the longitudinally extending openings whereby the selected liquid absorbs the gas molecules, and directing a second gas through a portion of the second mat so that the gas molecules, absorbed by and disbursed throughout the selected liquid, are stripped and carried away.

Abstract: An outside air handling unit and method for delivering conditioned air to individual heating/cooling zones of a building regardless of whether heating/cooling in needed. The outside air handling unit includes a liquid supply line which is connected to and draws liquid from a chilled supply line of the building.

Abstract: A modular water based heating and cooling system for providing chilled or heated water to terminal devices in a building to heat/cool individual zones in the building. The system includes a flow control device in fluid communication with a riser chilled water supply line, a riser chilled water return line, a riser heated water supply line, and a riser heated water return line. The flow control device includes first control valves and second control valves. Terminal device supply lines extend from the flow control device and are connected to respective first control valves. Terminal device return lines extend from the flow control device and are connected to respective second control valves. The first control valves and the second control valves cooperate to supply required chilled water or heated water through the terminal device supply lines to terminal devices based on the cooling/heating requirements of the terminal devices.

Abstract: A method for continuously removing a particular type of gas molecules (“gas molecules”) from a gas stream includes selecting a liquid having an affinity for the gas molecules to be removed, and providing the selected liquid to each of a first and second mat, each mat formed from a plurality of fibers having the ability to retain the selected liquid within longitudinally extending channels having longitudinally extending openings against moving into the space between the individual fibers, the mats in fluid communication therebetween with the selected liquid. The method includes directing the gas stream through a portion of the first mat into contact with the selected liquid along the longitudinally extending openings whereby the selected liquid absorbs the gas molecules, and directing a second gas through a portion of the second mat so that the gas molecules, absorbed by and disbursed throughout the selected liquid, are stripped and carried away.

Abstract: A method for continuously removing a particular type of gas molecules (“gas molecules”) from a gas stream includes selecting a liquid having an affinity for the gas molecules to be removed, and providing the selected liquid to each of a first and second mat, each mat formed from a plurality of fibers having the ability to retain the selected liquid within longitudinally extending channels having longitudinally extending openings against moving into the space between the individual fibers, the mats in fluid communication therebetween with the selected liquid. The method includes directing the gas stream through a portion of the first mat into contact with the selected liquid along the longitudinally extending openings whereby the selected liquid absorbs the gas molecules, and directing a second gas through a portion of the second mat so that the gas molecules, absorbed by and disbursed throughout the selected liquid, are stripped and carried away.

Abstract: Systems and methods for air conditioning a building using an energy recovery wheel are provided. An exemplary system includes a rotatable energy recovery wheel configured to rotate successively through a recirculated air stream and a second air stream separate from the recirculated air stream, and a refrigeration circuit configured to circulate a refrigerant through a cooling coil arranged in the recirculated air stream and a condenser arranged in the second air stream. The refrigeration circuit includes a pressure sensor configured to measure a condensing head pressure. The system further includes one or more temperature sensors configured to measure a temperature of the recirculated air stream upstream of the energy recovery wheel and downstream of the energy recovery wheel, and a controller configured to operate the energy recovery wheel and the refrigeration circuit based on the condensing head pressure and the temperatures of the recirculated air stream.

Abstract: A method for continuously removing a particular type of gas molecules (“gas molecules”) from a gas stream includes selecting a liquid having an affinity for the gas molecules to be removed, and providing the selected liquid to each of a first and second mat, each mat formed from a plurality of fibers having the ability to retain the selected liquid within longitudinally extending channels having longitudinally extending openings against moving into the space between the individual fibers, the mats in fluid communication therebetween with the selected liquid. The method includes directing the gas stream through a portion of the first mat into contact with the selected liquid along the longitudinally extending openings whereby the selected liquid absorbs the gas molecules, and directing a second gas through a portion of the second mat so that the gas molecules, absorbed by and disbursed throughout the selected liquid, are stripped and carried away.

Abstract: A modular water based heating and cooling system for providing chilled or heated water to terminal devices in a building to heat/cool individual zones in the building. The system includes a flow control device in fluid communication with a riser chilled water supply line, a riser chilled water return line, a riser heated water supply line, and a riser heated water return line. The flow control device includes first control valves and second control valves. Terminal device supply lines extend from the flow control device and are connected to respective first control valves. Terminal device return lines extend from the flow control device and are connected to respective second control valves. The first control valves and the second control valves cooperate to supply required chilled water or heated water through the terminal device supply lines to terminal devices based on the cooling/heating requirements of the terminal devices.

Abstract: An outside air handling unit and method for delivering conditioned air to individual heating/cooling zones of a building regardless of whether heating/cooling in needed. The outside air handling unit includes a liquid supply line which is connected to and draws liquid from a chilled supply line of the building.

Abstract: Systems and methods for air conditioning a building using an energy recovery wheel are provided. An exemplary system includes a rotatable energy recovery wheel configured to rotate successively through a recirculated air stream and a second air stream separate from the recirculated air stream, and a refrigeration circuit configured to circulate a refrigerant through a cooling coil arranged in the recirculated air stream and a condenser arranged in the second air stream. The refrigeration circuit includes a pressure sensor configured to measure a condensing head pressure. The system further includes one or more temperature sensors configured to measure a temperature of the recirculated air stream upstream of the energy recovery wheel and downstream of the energy recovery wheel, and a controller configured to operate the energy recovery wheel and the refrigeration circuit based on the condensing head pressure and the temperatures of the recirculated air stream.

Abstract: A refrigeration system (10) has a compressor (12) that forces a refrigerant to flow in a loop between an evaporator (17) and a condenser (16). The present method controls the speed of a condenser fan (16) in response to the condenser temperature. In a first control state, the speed of the fan (16) is varied in response to the condenser temperature. In a second state, the fan (16) is turned on and off by a pulse width modulated signal that has a duty cycle which varies in response to the condenser temperature. A transition occurs from the first state to the second state when the fan (16) operates at the slowest possible speed for a predetermined period while the condenser temperature is below a desired value. A transition occurs from the second state to the first state when the duty cycle is at 100% for a given period and the condenser temperature is above the desired value.

Abstract: A method is disclosed for programming and executing a state machine control program represented as a diagram in an HVAC controller. The diagram is converted to tabular data which is entered into one or more spreadsheet pages. The tabular data includes the defined output states, the defined input states and defined transition states, whereby a given output state and a given set of inputs will cause transition to a next output state. The tabular data is translated, through execution of a routine in a macro-instruction language, into a plurality of data structures for downloading into a finite state machine object data structure in the controller, where it will be acted upon by an object-oriented execution module, referred to as a class execute method, which is also present in the controller.

Abstract: The flow air from a hot air duct and a cold air duct into a zone of a building is controlled in based upon performing a thermal energy balance calculation for the zone. That calculation produces a heat transfer setpoint from which a hot air flow setpoint and a cold air flow setpoint are derived. The hot and cold air flow setpoints respectively control the flow of air through the hot and cold air ducts.

Abstract: A method for controlling non-synchronous actuators using a first and second estimate of the position of the actuator to create a variable position estimate window between which the actual position of the actuator is always bound. The first and second estimates of position are calculated based on the maximum and minimum speeds at which the actuator could be moving in each of first and second directions, and further wherein motion of the actuator in a saturated direction is disabled for as long as the first and second estimates converge at one of two final positions.

Abstract: The present invention provides a sequencing control strategy for environmental system controllers that takes better advantage of the capabilities of the system elements to enhance performance and reduce operating costs. A state machine controller is implemented by employing digital technology which enables greater accuracy in monitoring system performance and performing diagnostics. This control modality also provides greater tolerance of faults by permitting automatic reconfiguration of the control strategy so as to be independent of malfunctioning components.