Hello, may I ask you some questions about the boiler? Thanks for your help. Wish you a good day.
In BioSTEAM's cellulosic model, where does boiler blowdown go? Is boiler blowdown taken into account in the calculation of process water consumption? Boiler inlet makeup water, that is, RO grade water needed, has been considered in the amount of RO water, but the boiler blowdown does not seem to be considered in the amount of process water?
What is the meaning of negative HXN in cooling water, chilled water, and low pressure steam in BioSTEAM's excel Utilities? Does it represent the utility usage saved by HXN? If so, does the utility usage of other units in Utilities (e.g. -944330, -1850532,-295118,-17140) refer to the utility usage of other units prior to HXN execution? If so, after performing HXN, is the utility usage of the process the utility usage of the individual units plus the utility usage saved by HXN? That is to say, -944330 -1850532 -295118 -17140+1262407 is the utility usage of the process?
In BioSTEAM, does the boiler burn purchased natural gas to produce steam for heating, rather than purchasing steam for heating? In this case, the heat transfer price and regeneration price of all kinds of steam (low pressure, medium pressure, and high pressure steam) should be set to 0, right? And the cost of heating for the process is the amount of natural gas I buy times the price of natural gas (i.e. boiler.natural_gas_price), right?
Hello, may I ask you some questions about the boiler? Thanks for your help. Wish you a good day.
In BioSTEAM's cellulosic model, where does boiler![2](https://github.com/BioSTEAMDevelopmentGroup/Bioindustrial-Park/assets/125726021/d188e5d8-6b1b-451f-84da-2e760e850a5b)
blowdown
go? Is boilerblowdown
taken into account in the calculation of process water consumption? Boiler inletmakeup water
, that is, RO grade water needed, has been considered in the amount of RO water, but the boilerblowdown
does not seem to be considered in the amount of process water?What is the meaning of negative![1](https://github.com/BioSTEAMDevelopmentGroup/Bioindustrial-Park/assets/125726021/3420bbc9-292b-48a1-ab2f-7860eb9f323e)
HXN
incooling water, chilled water, and low pressure steam
in BioSTEAM's excel Utilities? Does it represent the utility usage saved byHXN
? If so, does the utility usage of other units in Utilities(e.g. -944330, -1850532,-295118,-17140)
refer to the utility usage of other units prior to HXN execution? If so, after performing HXN, is the utility usage of the process the utility usage of the individual units plus the utility usage saved by HXN? That is to say,-944330 -1850532 -295118 -17140+1262407
is the utility usage of the process?With the code
settings.get_heating_agent('low_pressure_steam'), settings.get_heating_agent('medium_pressure_steam'), settings.get_heating_agent('high_pressure_steam')
, the temperature and pressure of the three types of steam (low pressure, medium pressure, and high pressure steam
) are inconsistent, but why isduty_over_mol = 39000
used in the boiler the same (https://github.com/BioSTEAMDevelopmentGroup/biosteam/blob/master/biosteam/facilities/_boiler_turbogenerator.py#L306, https://github.com/BioSTEAMDevelopmentGroup/biosteam/blob/master/biosteam/facilities/_boiler_turbogenerator.py#L338)? Doesn't this mean that the duty of the three kinds of steam produced by the boiler are the same, but should actually be different? And the boiler code doesn't seem to distinguish whether the steam produced by the boiler is low-pressure steam, medium-pressure steam, or high-pressure steam (https://github.com/BioSTEAMDevelopmentGroup/biosteam/blob/master/biosteam/facilities/_boiler_turbogenerator.py)? Could I consult you how to check the duty of the three types of steam used in the process, that is, the amount of heat that 1mol of steam has or can transfer?Why is the price of
natural gas and ash stream
in boiler in BioSTEAM 0?In BioSTEAM, does the boiler burn purchased natural gas to produce steam for heating, rather than purchasing steam for heating? In this case, the
heat transfer price and regeneration price
of all kinds of steam (low pressure, medium pressure, and high pressure steam
) should be set to 0, right? And the cost of heating for the process is the amount of natural gas I buy times the price of natural gas (i.e.boiler.natural_gas_price
), right?In the model of
lactic acid
, it appears that the price ofnatural_gas
, that is to say, boiler inlet stream, is used instead ofboiler.natural_gas_price
(https://github.com/BioSTEAMDevelopmentGroup/Bioindustrial-Park/blob/master/biorefineries/lactic/models.py#L285-L289)?