MIUS SYSTEMS ANALYSIS - COMPARISON OF MIUS AND CONVENTIONAL UTILITY SYSTEMS FOR AN EXISTING DEVELOPMENT

摘要

This study was directed toward the application of the Modular Integrated Utility System (MIUS) concept to an existing housing-commercial develop¬ment (Walden) that is located near Chicago, Illinois. The postulated MIUS (the Live Model) would supply electricity, district heating and cooling, liquid waste treatment, and solid waste disposal to the develop¬ment. Potable water for human consumption and fire protection was not included in the study. The study was undertaken because earlier MIUS modeling efforts were made on models that allowed simpler analysis, but were not representative of actual housing developments. Comparisons of fuel savings, annual costs, and environmental impacts between the MIUS and conventional utility services to the development have been performed.nIn the Live Model, even though the source of electricity was small (engine-generators having an operating efficiency averaging about 30%), the overall fuel utilization was about 62%. The overall efficiency of fuel utilization for the conventional utility was only 51%. Thus the equivalent fuel consumption for the development using conventional utilities (Walden) was, in terms of natural gas, 173 x 106 ft3 vs 143.3 x 106 ft3 for the Live Model, a fuel saving of about 17%. Onsite incineration of solid waste with heat recovery was found to not have a significant effect on fuel savings (0.4 x 106 ft3 of natural gas saved).nEconomic analyses using present marginal cost for incremental services (as of January 1972) indicate that MIUS costs more than would be required to serve the same development conventionally. However, in the nonincinerator case, the net difference in owning and operating cost was only $124,300, which the developer may be willing to provide in areas where utilities are in short supply.nEnvironmental impacts of the Live Model are an increase in CO, HC, and N0X emissions, but a reduction in SO2 and particulate emissions. In any case, the Live Model will not exceed the Federal Air Quality Standards (FAQS) and the local air quality is not markedly changed from that of the conventional utilities. Impact due to onsite liquid waste treatment is mainly caused by releasing effluent at a different point than a large conventional system since the same, or higher, degree of treatment can be obtained with small plants as can be produced with larger plants.