Water pump flow monitoring method for air conditioning system based on parameter model

An engineering‐oriented variable water flow air‐conditioning system terminal flow rate estimation method based on component flow resistance characteristics

“…29 One promising potential solution to reduce the sensors cost is by exploring indirect measurement schemes of water flow rate, which have to be simple, reliable, and much more cost-efficient compared with flowmeters. 30 The indirect water flow rate measurement, in brief, is to reduce the need of flowmeters by replacing its functions with other cheaper sensors. Based on the theory that the pump flow rate of the water system could be estimated through related dynamic parameters, that is, motor power and pump head, [31][32][33] Liu et al 34 developed a simplified in situ fan curve measurement procedure that uses the fan curve from the manufacturer and measurement of air flow and fan head at one point.…”

“…One promising potential solution to reduce the sensors cost is by exploring indirect measurement schemes of water flow rate, which have to be simple, reliable, and much more cost‐efficient compared with flowmeters 30 . The indirect water flow rate measurement, in brief, is to reduce the need of flowmeters by replacing its functions with other cheaper sensors.…”

“…Long‐term experiments conducted by Kim et al 38 showed that flow rates measured by the virtual water flowmeter were quite close to those detected using ultrasonic measurements. Liu et al 30 further introduced a high precision pump flow virtual monitoring model whose input parameters can be easily obtained.…”