A HVAC control system is described that utilizes either a look-up table or an equation to calculate an apparent temperature based on the temperature and the moisture in the air at the control point. As the control system operates, the target temperature is constantly modified based on the current te
A HVAC control system is described that utilizes either a look-up table or an equation to calculate an apparent temperature based on the temperature and the moisture in the air at the control point. As the control system operates, the target temperature is constantly modified based on the current temperature and humidity or equivalently the calculated moisture in the air to maintain a constant apparent temperature. This has the effect of reducing the variance in the perceived comfort in the controlled area. An important additional feature is the cost savings due to reduced energy usage that is possible when external relative humidity conditions change so that less cooling or heating is required to maintain a comfortable environment.
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1. An HVAC control system to control a heating system and a cooling system in order to adjust apparent temperature to a desired apparent temperature, comprising: a temperature sensor to obtain an air temperature measurement and to generate a dry bulb temperature value from the air temperature measur
1. An HVAC control system to control a heating system and a cooling system in order to adjust apparent temperature to a desired apparent temperature, comprising: a temperature sensor to obtain an air temperature measurement and to generate a dry bulb temperature value from the air temperature measurement;a humidity sensor to obtain a humidity measurement and to generate a relative humidity value from the humidity measurement;an input interface to receive a desired apparent temperature value from a user;a controller to control the heating system and the cooling system, said controller in communication with the heating system, said controller in communication with the cooling system, said controller to receive the dry bulb temperature value from said temperature sensor, said controller to receive the relative humidity value from said humidity sensor, said controller to receive the desired apparent temperature value from said input interface, said controller to calculate a current effective temperature value based on the dry bulb temperature value and the relative humidity value, wherein said controller calculates the current effective temperature value through an algorithm that generates effective temperature values as outputs of a function that uses dry bulb temperature values and the relative humidity values as inputs,said controller to calculate a target temperature value based on the current effective temperature value, the dry bulb temperature value, the relative humidity value, the desired apparent temperature value, and said algorithm, such that adjusting the dry bulb temperature value to the target temperature value yields the desired apparent temperature value according to said algorithm,said controller to activate the heating system if the target temperature value is greater than the dry bulb temperature value, said controller to activate the cooling system if the target temperature value is less than the dry bulb temperature value. 2. The HVAC control system of claim 1 further comprising a humidifier to add moisture to the air, whereby the HVAC system maintains a constant apparent temperature with a lower dry bulb temperature value. 3. A method for controlling apparent temperature, comprising: supplying a controller in communication with a heating system and a cooling system;obtaining a measured dry bulb temperature value and communicating the measured dry bulb temperature value to said controller;obtaining a measured moisture value and communicating the measured moisture value to said controller;supplying a desired apparent temperature value to said controller;using said controller to calculate a current apparent temperature value based on the measured dry bulb temperature value and the measured moisture value, said current effective temperature value being calculated based on comparison of the measured dry bulb temperature value and measured moisture value to a table of apparent temperature values correlated to dry bulb temperature values and measured moisture values, said table of apparent temperature values correlated to dry bulb temperature values and measured moisture values including dry bulb temperature values between 15 degrees Celsius and 30 degrees Celsius, wherein each observed combination of dry bulb temperature value and measured moisture value constitutes a data-point-pair, and wherein each data-point-pair is correlated to one apparent temperature value, so that identifying the data-point-pair with dry bulb temperature and moisture value closest to the measured dry bulb temperature value and the measured moisture value yields a value for the current apparent temperature;using said controller to calculate a target temperature value based on the current effective temperature value, the dry bulb temperature value, the moisture value, the desired apparent temperature value, and said table of apparent temperature values correlated to dry bulb temperature values and measured moisture values, such that adjusting the dry bulb temperature value to the target temperature value yields the desired apparent temperature value according to said table;activating the heating system if the target temperature value is greater than the measured dry bulb temperature value; andactivating the cooling system if the target temperature value is less than the measured dry bulb temperature value.
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이 특허에 인용된 특허 (5)
Bahel Vijay (Sidney OH) Millet Hank (Piqua OH) Hickey Mickey (Sidney OH) Pham Hung (Dayton OH) Herroon Gregory P. (Piqua OH), Control system for heat pump having humidity responsive variable speed fan.
Schnell, Robert J.; Finch, Heidi J.; Schultz, David A.; Leen, Cary; Tessier, Patrick C.; Grenkoski, James, Methods of dehumidification control in unoccupied spaces.
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