Intelligent HVAC Load Management for Energy Efficient and Disaster Resilient Building Operations
Michelle Rodriguez-Pico | Oklahoma Gas & Electric
The project goal is to provide the necessary power for Department of Defense (DoD) missions to enhance energy resilience without significant capital cost while improve building energy efficiency. This goal can be achieved through the following technical objectives:
- Evaluate the initial costs, operation and maintenance costs of the disaster-resilient and energy efficient building operation scheme in a real-world DoD installation.
- Validate the performance, i.e. the energy savings and demand reduction, of the project Scheme using real-world DoD operating conditions.
- Enable direct technology transfer and commercialization by Oklahoma Gas and Electric (OG&E), making the technology available to Tinker Air Force Base (AFB) and across DoD.
To fit into a Utility Energy Service Contracts (UESC) vehicle, the project user priority-based disaster-resilient and energy efficient building operation scheme (Scheme here after) will integrate demand management with retrocommissioning and virtual smart metering technologies to realize energy efficiency improvement and energy resilience for the demonstration buildings. The Scheme is built upon the integration of the following four technologies:
- On- and off-peak demand management through optimal chilled water (CHW) storage tank charging/discharging operation for a flatter and therefore lower electricity demand profile that maintains the same cooling production when the power supply is limited.
- Priority-index based heating, ventilation, and air conditioning (HVAC) equipment control sequence to strategically reduce/curtail HVAC equipment usage when the power supply is limited.
- Innovative energy-feedback control, rather than the traditional temperature-feedback control, for cooling coil valves in air handling units (AHU) to realize fast and precise cooling curtailment control in AHUs.
- Energy-efficient HVAC operation sequences to acquire the HVAC energy savings to exceed savings obtained through typical retro commissioning process with the help of additional data provided by virtual airflow and water flow rate measurements.
Compared with the prohibitive cost and time for the microgrid design and installation, the project disaster-resilient building operation scheme provides a low-cost solution to sustain base military missions when buildings experience limited or no power supply by using the distributed power generation sources, thermal storage in the buildings, and demand-side management of existing building end electricity users. The Scheme allows the HVAC system mode switch to obtain energy efficient indoor environment control in normal mode and sustain base military mission in power-shortage mode.