- #1

Tired_undergrad

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- TL;DR Summary
- Attempting to calculate the amount of heat able to be stored in large concrete pipes heated via high temperature and pressure air forced through pipes in the concrete.

Hi Everyone,

I am looking to find how much heat can be stored in a concrete pipe of roughly 0.3-0.4m diameter, and an internal diameter of 0.05m. Air will travel through the internal diameter at 500°C and 17.5bar which will provide the heat for the pipes. This system will then be reversed so that cold air is pumped through the system in order to extract the heat.

In terms of output, I want to be able to determine:

What is the best way to go about calculating this? I know I can simulate it using CFD modelling however I was really looking to be able to calculate it in order to generate a table and determine the most effective configurations without running countless simulations.

Cheers,

I am looking to find how much heat can be stored in a concrete pipe of roughly 0.3-0.4m diameter, and an internal diameter of 0.05m. Air will travel through the internal diameter at 500°C and 17.5bar which will provide the heat for the pipes. This system will then be reversed so that cold air is pumped through the system in order to extract the heat.

In terms of output, I want to be able to determine:

- The amount of heat stored in the concrete at given time,
- The time at which heat in vs heat stored becomes inefficient and,
- The temperature distribution through the cross section at a given time.

What is the best way to go about calculating this? I know I can simulate it using CFD modelling however I was really looking to be able to calculate it in order to generate a table and determine the most effective configurations without running countless simulations.

Cheers,