System and apparatus for conditioning of indoor air

    公开(公告)号:US11768006B2

    公开(公告)日:2023-09-26

    申请号:US17961522

    申请日:2022-10-06

    摘要: A control system is provided for controlling heating and/or cooling with a conditioning load such as fan coils and chilled beams. Based on user input and ambient conditions, the control system determines a desired temperature for the liquid entering the load and combines fresh supply liquid (e.g., from a chiller or boiler) with a portion of the liquid that has passed through the load, to achieve the target load input temperature for the liquid. A recirculation pump may be used to return a portion of the liquid exiting the load for mixing with the fresh supply liquid and a control valve may be used to adjust the ratio of fresh supply liquid and recirculated liquid to achieve the targeted temperature. The control systems can be compatible with a variety of liquid supply systems such as two- and four-pipe systems.

    System and method for optimizing selection of an air filter

    公开(公告)号:US11719454B1

    公开(公告)日:2023-08-08

    申请号:US17900517

    申请日:2022-08-31

    发明人: Dirk ter Horst

    摘要: A method for determining a filter selection for an air filtration system having a current air filter includes entering filtration system information into a processor having access to pressure drop versus dust holding capacity curves for a plurality of different air filters, wherein the filtration system information includes user experience information including volume of air processed with the current air filter in the air filtration system and pressure drop with the current air filter after processing the volume of air; determining a cost factor of operating the air filtration system with the current filter for processing the volume of air; determining a theoretical quantity of dust held by the current filter at the pressure drop using a pressure drop versus dust holding capacity curve for the current air filter and the pressure drop exhibited by the current air filter after processing the volume of air; selecting a proposed air filter from the plurality of different air filters and different from the current air filter; determining an estimated volume of air that can be processed with the proposed air filter to reach the pressure drop, this determining step being conducted using the theoretical quantity of dust and a pressure drop versus dust holding capacity curve for the proposed air filter; determining an estimated cost factor of operating the air filtration system with the proposed filter for processing the volume of air; and presenting a comparison of the cost factor and the estimated cost factor on a display communicated with the processor.

    Automation and optimization of fuel feed to heating elements of heating, ventilation, and air conditioning (HVAC) systems

    公开(公告)号:US11698204B1

    公开(公告)日:2023-07-11

    申请号:US17832655

    申请日:2022-06-05

    申请人: Houshang Esmaili

    发明人: Houshang Esmaili

    摘要: This Patent application is based on a new method for calculating the hourly heating load for the heating elements of HVAC systems, with a potential for saving over 50% of the current fuel use by these systems. The method is based on using hourly outside air temperature from one or more thermometer installed along the vertical center of each of the building's orientations, and at the roof center. The temperature data, the building surface areas with different heat transmission characteristics in each orientation, plus hourly air infiltration rate into the building, adjusted for overall system efficiency, and Codes and regulatory requirements would yield the total hourly heating load. The fuel feed would then be automatically adjusted to release the hourly required fuel volume, or wattage, to the heating elements. The installed thermometer system could also be used to calculate the hourly cooling load for the building's air conditioning system, during the summer season.

    Predictive daylight harvesting system

    公开(公告)号:US09955552B2

    公开(公告)日:2018-04-24

    申请号:US14792590

    申请日:2015-07-06

    IPC分类号: H05B37/02 G05B13/04 F24F11/00

    摘要: In an example, an expected sky condition is calculated for a geographic location, a time of day, and a date based on a mathematical model. A predicted distribution of direct and interreflected solar radiation within the environment is calculated based on the expected sky condition. Measurement data from one or more photosensors is obtained that provides measurements of an initial distribution of direct and interreflected radiation within the environment, including radiation from solar and electrical lighting sources. A target distribution of direct and interreflected artificial electromagnetic radiation produced by electrical lighting is determined, based on the measurement data and the predicted distribution of direct and interreflected solar radiation, to achieve the target distribution of direct and interreflected radiation within the environment. Output parameters are set to one or more devices to modify the initial distribution to achieve the target distribution of direct and interreflected radiation within the environment.