Patents by Inventor Keegan Landreth

Keegan Landreth has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Device and method for converting solar PV energy into thermal energy storage using combined heat-pump and resistive heating elements in water heater
    Patent number: 11867412
    Abstract: Photovoltaics and an MPPT DC/DC converter powers a DC bus of a controller. It uses an electric heat pump to heat a mass like water, and also has a resistive heating element to heat the mass. A microcontroller controls a variable frequency (VFD) motor drive to power the electric heat pump when sufficient solar power is available to run the heat pump and uses the resistive element to heat the thermal mass when insufficient solar power exists for the heat pump or when excess solar power is available. A controller has an MPPT input for solar power and a VFD to provide power through an output to a heat pump-based water heater and an output to power a resistive water heating element. A microcontroller determines solar power available and runs the heat pump when possible and the resistive element when insufficient power is available or when excess power is available.
    Type: Grant
    Filed: December 22, 2021
    Date of Patent: January 9, 2024
    Assignee: PREMIER ENERGY HOLDINGS, INC.
    Inventors: Yusuf Gurkaynak, Nikola Milivojevic, Keegan Landreth, Michael Dean Steingrebe
  • Device and Method for Converting Solar PV Energy into Thermal Energy Storage Using Combined Heat-Pump and Resistive Heating Elements in Water Heater
    Publication number: 20220196251
    Abstract: Photovoltaics and an MPPT DC/DC converter powers a DC bus of a controller. It uses an electric heat pump to heat a mass like water, and also has a resistive heating element to heat the mass. A microcontroller controls a variable frequency (VFD) motor drive to power the electric heat pump when sufficient solar power is available to run the heat pump and uses the resistive element to heat the thermal mass when insufficient solar power exists for the heat pump or when excess solar power is available. A controller has an MPPT input for solar power and a VFD to provide power through an output to a heat pump-based water heater and an output to power a resistive water heating element. A microcontroller determines solar power available and runs the heat pump when possible and the resistive element when insufficient power is available or when excess power is available.
    Type: Application
    Filed: December 22, 2021
    Publication date: June 23, 2022
    Inventors: Yusuf Gurkaynak, Nikola Milivojevic, Keegan Landreth, Michael Dean Steingrebe