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Multiple packaged rooftop unit coordination for peak demand reduction.

Number: 3535

Author(s) : DEVENEZIA J., ROSSI T., MULLER M. R.

Summary

More than half of commercial buildings in the United States are served by packaged rooftop units (Schantz, 2015). Rooftop units are often controlled by dedicated thermostats acting on fixed heuristic setpoint schedules; thus, it is common for multiple units to operate as independent systems. As a result, many buildings are not taking advantage of cooperative energy management opportunities such as peak power reduction. Enabling grid responsiveness and curtailing lofty demand charges, at scale, adopting integrated unitary HVAC control represents an area of improvement that is mutually beneficial to the power producer and consumer. Putta et al. (2015) proposed a dynamic programming-based model predictive control framework for scheduling rooftop unit operations, requiring only onsite thermostats. Kim and Braun (2016) built on this research by demonstrating a practical integrated control layer for coordinating rooftop units. This research adapts the optimization concept and control methodology to develop a cloud-based application that limits cooling demand spikes. The controller was tested at a pilot location in Northern California for seven months. This work leveraged feedback from the testbed to gain practical insights for implementing a cloud-based thermostat controller. The application successfully achieved instances of up to 33% peak cooling demand reduction. The start-to-finish methodology used to develop and deploy a unit coordination application is explained in the sections of this paper, results and lessons learned are discussed.

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Pages: 8 p.

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Details

  • Original title: Multiple packaged rooftop unit coordination for peak demand reduction.
  • Record ID : 30030252
  • Languages: English
  • Source: 2022 Purdue Conferences. 7th International High Performance Buildings Conference at Purdue.
  • Publication date: 2022
  • Document available for consultation in the library of the IIR headquarters only.

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