Flow Intelligence for Hybrid Systems

Why Hybrids?

Energy prices are on everyone's mind. Every day building owners and managers explore options to get their fuel costs for heating, hot water, and their processes under control.

Unfortunately, many times the cost of upgrading their equipment makes these projects out of reach. To combat this, many engineers and performance contractors are turning to hybrid systems. In these installations, condensing boilers are sized for the condensing load of the building; however, when the load increases and the system begins to return water above the condensing set point, non-condensing boilers are used. The net effect is all possible fuel savings and a system that gets installed for a fraction of the cost of a fully condensing system.

Hybrid Control

Hybrid systems are a great idea, but they do represent a control problem. How do you know exactly when to use the condensing versus the non-condensing boilers? If you guess too conservatively, you waste energy by cutting the time spent in the condensing range. If you are too aggressive, you end up damaging your non-condensing boiler caused by the acidic productions of combustion condensing on the burner and heat exchanger.

So, how do you handle these issues? It's easy - just call Thermodynamic Process Control!

TPC's patent-pending design has two independent reset loops built in to the device. It is ready to go with hybrid systems!

You just tell the control which boilers are condensing and which are non-condensing, set the slope you desire, and the TPC-FI control takes care of the rest.

With these built-in dual control loops, you can push the envelope as far as possible to keep your boilers in the condensing range, and never worry about damage to your non-condensing boilers due to low return temperatures.

The TPC-FI control allows you to mix and match different sizes and types of hot water boilers and brings them together for the most energy-efficient and cost-effective boiler systems possible.