Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Electrical consumption"”.
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Interpreting human activity from electrical consumption data through non-intrusive load monitoring
… tool. Signs of wear are detectable through their electrical signal. Third, it provides awareness of human activity within a network. Each device has an electrical fingerprint, and specific devices imply associated human actions. From voltage and current measurements at a single point on the …
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Energy optimisation on wastewater treatment plants focusing on different aeration technology
… drastically. It is therefore important that electrical consumption be reduced throughout all sectors and wastewater treatment is no exception. With reduction of electrical consumption of WWTPs in mind, this thesis focused on the costing and viability of replacing less efficient aeration …
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Equivalent Deterministic and Stochastic Models for Periodic Time Series
… pattern every S time units. Outdoor temperature, electrical consumption, the roughness of machined surfaces, and machine tool chatter vibration are a few examples. This periodic behavior is caused by the dynamics of the underlying physical systems that give rise to the time series. Engineers are …
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Cost Savings Realized Through Proper Sizing of an Excessive Instrument Air System.
… a smaller air compressor could reduce the electrical usage of a large semiconductor manufacturing plant. A 200 horsepower Atlas Copco compressor was installed with the existing 500 horsepower Ingersoll-Rand compressors. Testing was conducted during the regular manufacturing process at MEMC …
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Aggregate model and analysis of the energy dynamics in the Kingdom of Saudi Arabia
… in the near future centered on increasing energy consumption. Today, the kingdom consumes approximately 1/3 of its oil production. If no action is taken and the kingdom continues business as usual, by 2026 it will consume 50% of its production, and by 2047 its entire production. A large percentage …
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Characterizing Water as Gap Fill for Double Glazing Units
… operation of commercial buildings to minimize electrical consumption of artificial lighting systems. Glazing systems designed to allow optimal visible light transmission also allow significant unwanted direct solar heat gain caused by infrared light. Conversely, glazing systems that are …
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Electrical Monitoring of Electromechanical Systems
… associated with subtle but observable changes in electrical consumption. A nonintrusive load monitor (NILM) is a convenient tool for electrical monitoring, in which all loads connected downstream of an electrical panel are monitored with a single set of current and voltage sensors. If collated in …
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Short-Term Electricity Demand Prediction in Great Britain Using Machine Learning
… of renewables, and the changing patterns of electrical consumption. The transition from conventional fossil fuels to weather-dependent energy generation from wind and solar technologies has introduced increasing uncertainty in supply and demand, making accurate and timely predictions critical …
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Sustainable development of refrigerator systems using replacement environmentally acceptable refrigerants
… focuses on the emissions that may arise if the electrical consumption of the product deteriorates or its durability is curtailed. Tribological characteristics on compressor components influence both of these product attributes and therefore a thorough system analysis was carried out. An in-house …
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Condition based monitoring and protection in electrical distribution systems
… rich, useful information" to help manage their electrical consumption without interference in their lives. There is a need for flexible, inexpensive metering technologies that can be deployed in many different monitoring scenarios. Individual loads may be expected to compute information about …
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Efficiency droop mitigation and quantum efficiency enhancement for nitride Light-Emitting Diodes
… LEDs could lead to the decrease of worldwide electrical consumption for lighting by more than 50% and reduce total electricity consumption by > 10%. However, there are still challenges for current state-of-the art InGaN-based LEDs, including ‘efficiency droop’ issues that cause output power …
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Expert Control Strategies for Solar Cooling systems
Between 1990 and 2009, household final energy consumption in EU-27 increased by 8%, caused by rising standards of living, an increase in comfort levels and broader ownership of domestic appliances. In 2009, the total electrical consumption due to residential sector amounted at 36%. Space heating …
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Enhanced membrane distillation : analytical and deionization applications
… MD does not require specialized equipment, high electrical consumption, the use of strong acids and bases nor does it generate hazardous waste as a by-product. In membrane distillation, a heated solution is passed through the lumen of a hollow fiber porous hydrophobic membrane. The vapor pressure …
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DESALINATION TECHNOLOGIES AND ENVIRONMENTAL ASPECTS: CASE STUDY IN LIBYA
… interelectrode spacing 2 cm and 4 cm, the power consumption was higher, with a greater concentration of sodium hypochlorite generation varying between 10-25 kw/m3 (573-2140ppm) and 29-24 kwm-3 (572-2600ppm) than at interelectrode spacing 6cm 17-13 kwm-3 (350-1790ppm). Consequently, the selection …
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Development of a specialised test rig for assessing the efficiency of large industrial induction machines
… and across the globe. Approximately 60% of the electrical consumption in SA is utilised by motorised systems. The need for optimization of efficiency is on the rise due to the crisis not only in South Africa but in the whole world. Minimum energy performance standards (MEPS) applications are …
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The effect of high solid retention times in activated sludge reactors on operational costs at Mitchells Plain WWTP
… AS reactor. This will lead to higher electricity consumption by the aeration equipment or possible poor effluent quality, where (i) the aeration equipment is limited in potential to supply oxygen required to meet the increased demands for organic removal and nitrification and (ii) the thickened …
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Application of DMAIC to improve energy consumption in a commercial building
Submitted for the fulfilment of the requirement for Master of Engineering in Industrial Engineering, Durban University of Technology, Durban, South Africa, 2021.