What is a Chilled Water Flow Meter?
A chilled water flow meter refers to a flow meter that can be used to measure low-temperature water. Common chilled water flow meters include electromagnetic flow meters, turbine flow meters, and ultrasonic flow meters. Used in the condensing system, chiller, or HVAC.
Chilled Water Flow Meter Types
There is no best water flow meter, only the most suitable water flow meter. Because the application details of each pipeline are different. According to the actual measurement situation, select the most suitable flowmeter. Can save a lot of time and cost.
Featured Chilled Water Flow Meters
What are the limitations of electromagnetic flowmeters at low temperatures?
Electromagnetic flowmeter transmitters are bound by two aspects when measuring cryogenic media.
Can ultrasonic flowmeter measures chilled water flow?
- Ultrasonic flowmeter can measure flow. The temperature does not exceed -40℃~160℃. It is required to have a full tube and a uniform medium. It can display instantaneous flow, flow velocity, accumulated flow, accumulated running time, etc.
- Ultrasonic calorimeter can measure heat supply, flow and temperature monitoring. Air conditioning heating and cooling capacity measurement.
When you place an order, you can specify whether it is to measure flow or heat. We will help you choose the model.
Extended reading: Industrial VS Residential inline water flow meters
How to measure the chilled water flow of the chiller?
The following is our experience sharing: Freezer chilled water flow measurement techniques. Hope it can be helpful to you.
1.Water pressure detection of the water inlet and outlet pipes of the freezer
Through the detection of the return water pressure and the outlet water pressure value. Check the water flow rate of the freezer under the pressure difference between the inlet and outlet water in the random manual of the freezer.
By referring to the corresponding table or diagram of the unit’s water flow in the manual. So as to determine whether the freezer system is normal.
And through this difference to determine which section of the water pipeline has a higher resistance value. And make corresponding rectification plans and actions.
2.Detection of the return water temperature and outlet water temperature of the refrigerator (the unit needs to be in normal state)
30 minutes after starting up, check the system or chilled water system inlet and outlet thermometers through the parameters of the unit’s control system.
It can read the inlet water temperature and outlet water temperature when the unit is running. The difference must be about 4-6 degrees.
If the temperature difference between the inlet and outlet water is too large, it means that the water flow of the water system through the plate is too small. This may cause the unit to fail to operate normally or be damaged.
3.Water pump running current detection
By detecting the running current of the refrigerator water pump, it is compared with the rated current. It can be judged whether the actual water flow is larger or smaller than the rated water flow of the pump.
Comprehensive judgment together with the previous parameters. In order to get an exact test and analysis report of the chiller system.
4.Detection of the suction temperature of the compressor copper pipe (only when the refrigeration is running)
If it is 30 minutes after the refrigerating and freezer is turned on
It is detected that the suction temperature of the compressor is lower than 0 degrees. It means that the water flow in the water-side heat exchanger is not enough, which leads to a drop in the evaporation temperature and the evaporation pressure.
And cause Freon is still evaporating and absorbing heat in the suction pipe that flows from the evaporator to the compressor. Will cause the compressor suction temperature to be lower than 0 degrees.
In addition, it is necessary to eliminate the drop in evaporation pressure and evaporation temperature caused by the water temperature set point being too low.
The non-standard low water temperature unit can be considered normal as long as the compressor has a suction superheat of 6-8℃.
So under normal water flow. The suction temperature of the compressor is generally greater than 0°C. Below this value, water system problems need to be ruled out.
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Sino-Inst offers over 50 Chilled Water Flow Meter for flow measurement. About 50% of these are magnetic flow meters, 40% is the turbine flow sensor, and 20% are Ultrasonic and mass flow meter.
A wide variety of flow meters options are available to you, such as free samples, paid samples.
Sino-Instrument is a globally recognized supplier and manufacturer of flow measurement instrumentation, located in China.
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