tanks for fertilizersAlthough short cycling processes are useful in some boiler systems, they are not suitable for condensing boilers because of the quick wear and decreased boiler efficiency it causes. Condensing boilers can only handle a low volume of water. So, when heating occurs, water temperatures increase rapidly and cause the boiler system to cycle off prematurely and, in worse situations, exceed the high limit.

The efficiency of your boiler, therefore, will decrease eventually due to the fluctuation in performance.

The Solution: Buffering to Increase Boiler’s Efficiency

Buffer tanks are critical elements you should consider incorporating in your boiler system when it does not have enough water to absorb extra heat during the start-up process or process operation. It is, however, worth noting that every boiler system has a minimum system load. Therefore, maintain the boiler output lower than the system load.

But if your tank holds a small volume of water and the boiler output exceeds your system load, your water will heat up faster than average, and affect the functioning of your boiler. In such instances, you will need buffer tanks to store the excess heat, which will heat up smaller volumes of water without requiring any input from the boiler. Therefore, your boiler will stay off longer, thereby prolonging its lifespan.

What Size of Tank is Appropriate? Consider:

Minimum Boiler System Load – This factor depends on the least demand from your boiler system. The minimum load limits will help manage the output of your boiler.

Minimum Boiler Output – The output of your boiler is not necessary when it is at its highest performance. You will only require it during the starting process.

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Boiler Running Time – How long do you intend your boiler to keep running? Lower running time is recommendable for condensing boilers.

A buffer tank is a necessary addition to your boiler system if you want to increase the efficiency and lifespan of your boiler system. Nonetheless, you will need to carefully consider your boiler’s output, running time and minimum system load to determine the right size of your tank.