The issue of parking in cold and hot conditions
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The regeneration hot shutdown and cold shutdown in UOP Generation 3 are a bit confusing; it seems like there’s no difference between them – it’s just that electric heating keeps running, right? Please give me some guidance, senior
The main difference between cold shutdown and hot shutdown lies in whether the electric heater is turned on or not; cold shutdown provides greater protection for the catalyst compared to hot shutdown. Stopping the electric heater is even more beneficial for protecting the catalyst!
Nitrogen pollution, even when the system is shut down, will mix into hydrogen; cooling is necessary
1. Recovery to normal is fast when stopped by heat, but slow when stopped by cold； 2. Cold shutdown has a significant impact on the heater, and it should be avoided at all costs.
If the engine is shut down for more than 96 hours, it is recommended to use a cold shutdown
There are several conditions for a cold shutdown, such as low nitrogen pressure and issues with the isolation valve functionality. Heat shutdown can be recovered quickly; generally, the shutdown time is short, and a cold shutdown is required for longer durations.