DIRECT ANSWERUse one unit and reference basis to record average consumption, peak rate and duration, refill interval and credible delay, minimum usable inventory, reserve time and future cases. The authorized designer can then convert the consumption balance into usable inventory and nominal tank volume. Daily consumption alone is not enough, and nominal volume is not the same as usable stock.
Build the consumption balance before choosing a nominal volume
Separate metered values, design values and estimates. Keep liquid withdrawal separate from gas demand converted to a stated standard condition, and show start-up, purge or intermittent loads instead of burying them in a single average.
- Average hourly or daily use and the observation period
- Peak rate, duration, frequency and simultaneous users
- Normal refill interval, credible transport delay and unloading restrictions
- Minimum operating inventory, reserve hours and consequence of supply interruption
- Current duty and each future expansion case
Example information sheet
The entries below illustrate how to organise an enquiry; they are not a sizing result or a Huawang delivery case.
| Input | Example form of entry | Why it matters |
|---|---|---|
| Average demand | Mass or liquid volume per day, or gas flow with stated reference conditions | Allows a consistent material balance |
| Peak demand | Peak flow, duration and events per day | May govern vaporization and regulation duty |
| Refill | Normal interval, longest acceptable delay, vehicle/unloading limits | Replaces an ideal logistics assumption with a credible supply case |
| Reserve | Minimum inventory, emergency hours and shutdown consequence | Turns continuity needs into a reviewable boundary |
| Losses/open items | Venting, return gas, heel and other unavailable inventory assumptions | Prevents nominal capacity from being treated as fully usable |
Conditions to confirm for the project
- Medium, purity and whether liquid or gas is consumed
- Average and peak demand on a stated basis
- Refill logistics and credible supply delay
- Usable-inventory limits and reserve strategy
- Site, ambient, vehicle and expansion constraints
Relevant manufacturing capability
- Cryogenic pressure-vessel manufacturability review
- Insulation, interfaces and package-boundary coordination
- Large-equipment inspection and delivery planning
Key notes
- Do not recommend a fixed capacity from industry name or average use alone.
- Confirm filling, minimum level, pressure management and unusable inventory in the project design.
- The example table is an enquiry aid, not a design calculation.