Energy Plant Optimal Control System

The operation configuration for maximizing the energy-saving impact on Energy Plant systems varies depending on the conditions of outside air and loads. Manual configuration cannot always optimize the operation in accordance with the ever-changing outside conditions.
With optimized control based on simulations, this technology maximizes the impact of energy saving for Energy Plant systems.

• This system maximizes energy savings from Energy Plant systems, and helps reduce running costs and CO2 emissions.
• It automatically collects various measurement and computational data, and then makes operating records and energy saving volumes visible, contributing to a further improvement in operation.

The Energy Plant optimal control system consists of two subsystems, HSSsim and GPPECO.

• HSSsim is energy simulation software that supports any Energy Plant system.
• With it's nonlinear mathematical programming it can perform computational optimizations.

• This software is designed to reflect upon the simulation results from HSSsim in order to control operations in a smooth and safe manner.
• It features monitoring and Energy Plant optimal control capabilities.

Based on the results of computational optimization with the HSSsim Energy Plant simulator, the system delivers optimal control in accordance with the ever-changing outside conditions.

The system has the capability to keep a stabilized operation and to switch between optimal and fixed control modes.

The system provides a real-time display of the computed volume of energy savings relative to a reference system.

	R1	R2	Operation Pattern	Cold Water Pump Cooling Water Pump	Optimized Operation	Annual Energy Use for Operation
1	Constant-rate turbo	Constant-rate turbo	R1 R2	Constant flow	-	Reference
2				Variable flow	-	-15%
3		Inverter turbo	R2 R1 (Inverter machine prioritized)	Variable flow	-	-20%
4					Applied	-30%

Optimized control provides a 30% better energy-saving operation than a reference system.
(Energy-saving effects may vary depending on system.)
HSSsim Energy Plant simulator enables examination and control of an optimal system.

• PLC (Programmable Logic Controller) collects measurements.
• GPPECO determines optimal settings based on the collected measurements.
• The monitoring system writes the optimal settings into PLC.
• PLC controls the plant based on the optimal settings.