Ultrasonic Hydronic Flow Measurement

 

 

Ultrasonic Flow measurement provides real-time flow rates where delta pressure diffentials and congruent delta temperature comparisons can be inaccurate.

 

Prior to this technology the Test and Balance contractor was reliant and temperature/pressure deltas to confirm flow rates and subsequent total rejected MBH ratios. Consider however that if the tubes in a chiller are fouled and or restricted by oil (low velocity in part load) the resulting hydronic delta differential could indicate a higher flow rate than what is actual. It is true that delta temperature differentials coupled with delta pressure diffentials used in comparative analysis can be accurate, “If the Submittal Data is accurate” and the machine is charged correctly.

 

Therefore, the introduction of ultrasound instruments used in conjunction with delta pressure/temperature measurements will ensure a much higher accuracy.

Electrical consumption and subsequent building performance may be enhanced by the incorporation of controls modifications to the hydronic system.

 

Modifications to the secondary/tertiary pumping control systems have been made by us to provide significant improvements in power consumption by installing pressure transducers at the top of the highest buildings and calculating the low pressure selection points, we then control both the secondary pumps and the tertiary pump speeds. As the secondary and tertiary pumps reduce in volume, the chillers unload and the cooling tower fans decelerate providing multiple energy savings (in particular, the demand meters).