Strategic Unbalanced Supply-Demand Operation

Besides PCM and system optimization design, SUSDO is one of the three core elements of the Ultra High Efficiency BocaPCM-TES VSD Chiller Plant System.

Strategic Unbalanced Supply-Demand Operation (SUDSO) red=fer to the process of how Boca PCM TES works in a chiller system. It not only works as a cold buffer but also an extra free cold source for refrigeration load required . Here is an illustration of how PCM TES works.

What does UNBALANCED mean?

Let’s see a simple example.

(1) Common Chiller Plant System

Supposed that in a common chiller plant system the cooling load side asks the chiller plant side to supply 100RTs (Refrigeration Ton) to satisfy the need for cooling.

This is what’s happening :

The chiller plant responds to produce 100RTs to the demand side in a short period of time.

Boca SUSDO illustration

And when in prime hours the cooling load side rises the demand to 150RT, the chiller plant responds and rises its production capacity to 150RT in a short period of time.

Boca SUSDO illustration-1

In any situations, Supply equal to Demand.



(2) BocaPCM-TES Chiller Plant System

For a BocaPCM-TES Chiller Plant System, this is what’s happening.

If whenever the cooling load side demands for 80RT, the chiller plant will stably run at 60% to 80% of his capacity and produce 100RT as usual because at this level the chillers reach the best efficiency.

Boca SUSDO illustration-2

In this situation, Demand does not equal to supply.


BocaPCM-TES restores the balance

(A) Store the surplus

In the example, where is the extra 20RT going?

It goes to the BocaPCM-TES Tank and is stored for later use.

Boca SUSDO operation-1

(B) Release for the outstanding

If whenever the cooing load side rises the demand to 150RT, the chiller side can still run stably at its best efficiency level. It can keep supplying 100RT, only letting the BocaPCM-TES Tank to release 50RT from its storage to take up the outstanding amount so to satisfy the need from the cooling load side.

Boca SUSDO operation-2

With BocaPCM-TES, SUSDO works!

The BocaPCM-TES System has its patented PCM panels stacked inside the tank which can store coolness for later use. Run stably all day long, even producing at night time, the TES stores residual RT capacity into the tank for daily use. When need is on call in daytime, an outstanding amount will be released from the tank to meet the rigid demand.

Without the storage, there are simply no way to practice SUSDO and the best possible efficiency level of the chillers can not be maintained all day long.

Difference with/without TES

balance the unbalanced.

Enjoy great SAVINGS with SUSDO

Great Storing. Great Savings.

Click Picture to learn more.

Save Electricity Money

With SUSDO, your chiller plants can wait till the night to produce refrigeration tons, then store them in BocaPCM-TES tank for use in daytime. In many countries, electricity tariff for night time is much cheaper than for daytime. You will save a lot of money here.

Save Energy

PCM can freeze at 8°C, which can be reached with far less, or no extra energy spent for this purpose. Yet in some area this is even the ambient temperature. Moreover, with SUSDO your chiller plants do not need from time to time respond to any sudden rise of demand for RT, you will save a lot of energy here.

Save Maintenance Money

Because your equipment does not need to cater to the immediate frustration of  demand for RT, you may enjoy great benefit from this relatively stable working state. The life of service will last for a longer time and the need for less maintenance and manpower means you will save a lot of maintenance money here.

Save Initial Facility Money

Besides longer service life of your equipment, your chillers can now run in a stable working state regardless of sudden rise of RT demand, yet BocaPCM-TES could provide residual RT and act as energy buffering. It means that chillers plant, pumps and related pipework don’t have to prepare for prime time highest loads. You will save a lot of initial facility money here.