Abstract:
Systems and methods for modulation of airflow within an existing air conditioning system are described. The existing system includes an air conditioning or HVAC unit coupled with air supply and return ducts. Motorized dampers can be controlled by a controller that receives information about various rooms and areas from temperature and occupancy sensors within those rooms or areas. In this manner, conditioned air can be directed to those rooms that are occupied and whose temperature needs correction based on a thermostat setting.
Abstract:
Present systems, devices and methods, etc., provide heating, ventilation and air conditioning (HVAC) systems such as a dedicated outdoor air systems (DOAS) configured to provide carefully controlled air to at least one room, typically a building comprising a plurality of rooms eachhaving different heating, ventilation and air conditioning settings. Such systems can provide enhanced comfort for users and improved energy usage, and/or other benefits. The HV AC systems and methods, etc., herein comprise a plurality of independently addressable cooling heat exchangers such as evaporator coils that can be used in combination with variable refrigerant flow (VRF) and directionally variable air flow (VAF). The bulk of the discussion herein refers to evaporator coils but other suitable cooling heat exchangers can also be used. Such systems can provide ventilation in an energy efficient way based for example on accumulated CO 2 levels in a space, a user-input demand, or a scheduled demand. In some embodiments, the systems and methods herein include in some embodiments variably exposable evaporator coil geometry for a 20%- 100% outside air system with constant dew point leaving air control. The precise, selective control herein can be accomplished by a selected, carefully controlled variable air flow across a plurality independently addressable cooling heat exchangers and, if desired, available refrigerant flow, based on desired demand elements such as the heat load presented to each active evaporator coil.
Abstract:
An evaporative fluid cooling apparatus includes a cooling housing, at least two fluid coils, an air movement apparatus, and one or more spray apparatuses. The cooling housing defines a cooling chamber with an air housing input and an air housing output. The fluid coils are positioned in and extend across at least a portion of the cooling chamber in a spaced apart stacked arrangement. One of the fluid coils is positioned closer to the air housing output and has a first fluid input configured to be coupled to a fluid return from one or more air handler devices and a first fluid output coupled to a second fluid input to the other fluid coil. The other fluid coil is positioned closer to the air housing input and has a second fluid output configured to be coupled to a fluid supply to the air handler devices.