I am talkilng about 200 kw and above.
Why we can say that, for example, to remove the impeller in the split case vertically mounted pumps you don't have to remove the motor unlike the vertical inline where you have to remove the motor. Also for the bearing/seal maintenance you had to do the...
Dear anergri, I meant valve authority which expresses the ratio between pressure drop across the control valve compared to the total pressure drop across the whole circuit. The formula to calculate valve authority is,
N= ?P1 / ?P1 + ?P2
Where,
?P1 = Pressure drop across fully open control...
For cooling and heating coil applications, globe valves are usually used as a control valve as their performance curves meets the coil curve to get a resultant of a valve linear operation, which means when you close the valve 10% it reduces the flow by 10%. In this case the authority of the...
As a mechanical engineer, when it comes to the BMS/Ethernet/100bps/Modbus/VPN... I feel helpless. However, What I meant with BMS is the Building Management System with Dirict Digital Conrollers connected on the automation level through Ethernet/IP connection.
I know that Scada system with PLC...
Now days, can we still say that Split case vertically mounted pumps are easier to be maintained over the vertical in-line pumps.
What are the other advantages and disadvantages which allow you determining which is better for your application?
Application: Chilled water systems
When trying to install a two-way control valve of 450mm size and larger, we usually end up using motorized butterfly valves (globe type is very expensive). The application is chilled water system, Plate Heat Exchanger.
Does valve authority matters when using BF valves for flow control application?
Is it true that the lowest condenser temperature you can get is the better for the chiller efficiency? Or below certain temperature there will be no benefits to the efficiency?
To calculate the flow rate of the jockey pump, it is related to one sprinkler flow rate and the leaking rates as per the figures in the NFPA (at design stage it is not possible to get that actual), would 10% considered a correct value or is it too much?
In the application of district cooling plants, which system is better to control and monitor the process of producing chilled water and the distribution on the buildings Heat Exchanger Rooms. SCADA or BacNet BMS system?
I always face a big problem when working on the Solid Modeling projects on AutoCad, the size of the file gets bigger and bigger with all the details I add, is there a way to minimize this file size?
I am facing a problem with the size of the AutoCad dwg files when working on the solid modeling, specially when the number of details increase. Beside purging is there any other way to minimize the size?
poppeye, before the hammering, the pipes were aligned and inspected. They did use chainfalls to get the pipes aligned but this is normal practice for large pipes. The other contractor was excavating without considering the existance of this branch line. The welded branch connection was damaged...
poppeye, our case is as follows: we are using large diameter replaceable EPDM liner valves (up to 1500 mm) for a buried chilled water network, the valves are located in valve chambers. We faced a situation where some contractor hammered on the branch pipe connected to the main (where the valve...
