Phase change material evaporator charging control

摘要

A method of controlling an air conditioning compressor in a heating ventilation and air conditioning system having a evaporator including a phase change material is presented. The method includes the steps of measuring an evaporator output air temperature, determining a state of charge value by calculating a difference between an estimated refrigerant temperature based on the evaporator output air temperature and a phase change material freeze temperature and integrating this difference over time and operating the air conditioning compressor to maintain the state of charge value between an upper and lower limit. A method of recovering braking energy in a vehicle containing a heating ventilation and air conditioning system having the evaporator including the phase change material is also presented.

主权项

1. A method of controlling an air conditioning (A/C) compressor in a heating ventilation and air conditioning (HVAC) system having an evaporator including a phase change material, the method comprising the steps of:
measuring an evaporator output air temperature (EOAT); determining a state of charge (SoC) value based on the EOAT; determining an upper limit value and a lower limit value for the SoC; initiating operation of the A/C compressor when the SoC value is less than or equal to the lower limit value; and discontinuing operation of the A/C compressor when the SoC value is greater than or equal to the upper limit value.