Meaurement of Pipe Line Losses in kCal/kWh

Definitely this is a loss. Your best bet is to use a steam table to compare the enthalpy at upstream T and P with that at downstream T and P. (The loss dissipates as heat flow through the pipe wall and insulation.)

not to mention the condensates

Heat in condensate will be reused to generate steam.

Measure the pressure drop with manometers on the in and outlets in question.

Calculation of loss is the higher pressure minus the lower pressure.

Look up the steam tables to get information about the thermal loss (if any, not in the boiler for sure).

You then can account for the loss and update the manual.

In the end there is losses in every system. You might just look at the input and output from the system and calculate the losses in whole.

Have fun!

Is the pipe insulated properly?.

Yes it is Insulated properly.

Boiler Outlet and Turbine Inlet parameters are as follows :

Boiler Outlet pressure :17.4 MPA Steam Flow :1894 TPH Enthalpy : 3396.37 kJ/Kg

Turbine inlet pressure :16.67 MPA Steam Flow :1866 TPH Enthalpy: 3394.4 kJ/Kg

How can i estimate my Heat rate loss due to this ?

[(1894 x 3396.37 x 1000) - (1866 x 3394.4 x 1000)] kJ/h. Where is the leak?

Hiiii,

Boiler Outlet and Turbine Inlet parameters are as follows :

Boiler Outlet pressure :17.4 MPA Steam Flow :1894 TPH Enthalpy : 3396.37 kJ/Kg

Turbine inlet pressure :16.67 MPA Steam Flow :1866 TPH Enthalpy: 3394.4 kJ/Kg

How can i estimate my Heat rate loss due to this ?

You lose as much as you lose steam in the process.

As been asked before: Where is the leak? Fix the leak and come again. Or fix your measurements.

When you open steam into a cold pipe there will be heatloss due to warming up of pipes,valves etc.After attaining steady state the loss will be only condensate in steam traps & any leaks in pipe work/fittings.

Hii,

Pipe is carrying Superheated steam of 537 C (Properly Insulated)

There is no leakage.

There is a pressure drop within the pipeline (Boiler Outlet to turbine inlet) from 17.4 Mpa to 16.67 mpa with enthalpy drop. Pressure drop is due pipe line length & bends.

ENERGY SAVED TODAY IS ASSET FOR FUTURE

Gaurav

1894 - 1866 = 28 TPH difference. Where did it go?

The loss should be accounted for in an overall plant heat balance document.

This document forms the basis for many contractural documents.

Do you have a heat balance for your plant ?

Yes,

Heat balance diagrams are available.

You may be looking (at several) calibration errors? The steam pipe may actually be undersized for the job it is supposed to do, which is deliver the product steam to the turbine. You should do a finite element analysis of the piping, valves, governor, etc. to see if the data you are presenting is consistent with plant design, otherwise, you almost certainly have leaking steam. Is this actual data during operation? Only one operating point? Make sure your data is not being read off some nameplate.

It sounds like your system is a large one, so all these analyses are worthwhile. If your data is correct, you are losing a great deal of potential energy just in transmitting steam to the turbine, and that is unacceptable. For example, you seem to be "magically" losing 30 tons steam flow per hour without a leak. This is pretty hard to swallow. You should make sure the correct documentation of flow measurement is present. Loss of pressure I could understand, but that much loss of flow sounds like either a huge leak or transmitter problems. Re-check unit heat rate values, and compare with benchmark data on the unit.