6 replies to this topic

[Afshin445]

Dear Friends,

I am trying to estimate required steam for coils located in Storage Tanks.
This coils maintain operating temperature of Tanks when we have heat loss.
I am looking for any kind of software or spreedsheet can help me to estimate
required steam for maintaing Tank temperature in specified value.

I am very gratful if anybody can help me regarding this matter.

Regards,
Afshin

[ankur2061]

Afshin,

For heat loss calculations a very good spreadsheet is available at the following link:

http://www.cheresour...__1

Additionally, you can calculate the heat loss from the "Tyco Thermal Controls" calculation procedure given at:

http://www.tycotherm...design_0807.pdf

The steam flow rate to the tank coils can then be calculated as follows:

m = 3600*Q / λ
where:
m = steam flow rate to the coils, kg/h
Q = heat loss from tank, kW
λ = Latent heat of steam @available pressure, KJ/kg

Hope this helps.

Regards,
Ankur.

Edited by ankur2061, 29 June 2010 - 10:33 AM.

[Afshin445]

Dear Ankur,

I used the spreadsheet and the data in article published by Jimmy D Kumana and Samir P Kothari i.e. "Predict storage-tank heat transfer precisely" but the result doesn't match.

In this regard, I used "Tyco Thermal Controls" procedure but there is no formula for Heat loss from Roof of Tnak.

Could you please refer me to another procedure or Spreedsheet.

Regards,
Afshin

[ankur2061]

Afshin,

There is a "Chromalox" Training & Calculation manual for tank heating available. Try this; maybe it could help:

http://www.chromalox...TankHeating.pdf

Regards,
Ankur.

[Zoe1]

I have a similar question, I am a process engineer and new to this forum.
I am busy designing a storage fascility. The vessel will be insulated. I have already calculated the heat loss as 6kW.
Now i need to determine how long the vessel can stand during winter conditions to reach a certain temperature.
I know this is suppose to be a simple solution, but for some reason I cannot get an equation as a function of time??

[ankur2061]

Zoe1,

Why would you want to undertake this exercise?

If you have calculated the heat loss then you would like to take measures to prevent the heat loss by providing suitable insulation or by providing external heating. I would like to think that this should be the focus of your engineering effort.

Regards,
Ankur.

[demank]

I have a similar question, I am a process engineer and new to this forum.
I am busy designing a storage fascility. The vessel will be insulated. I have already calculated the heat loss as 6kW.
Now i need to determine how long the vessel can stand during winter conditions to reach a certain temperature.
I know this is suppose to be a simple solution, but for some reason I cannot get an equation as a function of time??

If you already calculated heat loss in the winter,
i think you can easly straigth forward to calculate the temperature as function of time.