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agreement provides only for parallel operation, and does not allow for sending energy from the microturbine back into the grid. Because the occupied building electrical demand exceeds the microturbine rating, it is felt that this is a satisfactory arrangement. Pilot Test for the City of Milwaukee The City of Milwaukee has remained engaged in this demonstration project. City engineers troubleshoot the unit and interface with the Milwaukee School of Engineering team. The potential exists to expand a cogeneration technology to many city-owned buildings. A detailed economic analysis will allow the City to determine whether this microturbine technology is a good fit. Energy Savings Some preliminary results are available with respect to possible energy savings with this cogeneration installation. Because of the relatively high cost of natural gas, it is unlikely that the microturbine will be a cost-effective alternative to purchased electricity, unless high peak electric rates are triggered. The true value of the facility comes in its potential to provide thermal energy to the building. For this reason, it is advantageous to add as much thermal load to the unit as possible. One major limitation to this installation is the lack of thermal load in the summer. Summer thermal load could be provided by an absorption refrigeration system for building cooling. Unfortunately, this building has an already-existing vapor-compression refrigeration system. It is, however, possible to perform an economic analysis that would uncover any energy savings that might occur were absorption refrigeration to be included. An important lesson here is that decisions about the feasibility of a cogeneration installation should not be made without including heating and cooling systems for the building in the analysis. Progress on Public Goals Early in the development of the project it was recognized that a public audience could benefit from an understanding of distributed generation. Part of this public audience consists of developers and building owners, a segment specifically targeted by Focus on Energy as having the potential to employ energy-saving technologies. For this group, the physical site of the microturbine, as well as the Website, provide tools for education. Site tours and presentations are anticipated for this group. For the general public, the publicity generated by the installation has been of value. Since the facility is operated by the City of Milwaukee, city taxpayers are actually stakeholders in the project. This has helped to generate media attention. Proceedings of the 2004 American Society of Engineering Education Annual Conference & Exposition Copyright © 2004, American Society for Engineering EducationPDF Image | A 60-kW Microturbine Demonstration Facility Phase II: Instrumentation, Website Development, and Evaluation
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