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Full-Text Articles in Engineering
Manufacturing Energy Consumption And Assessment For Us Small And Medium Sized Manufacturers, Yadan Zeng
Manufacturing Energy Consumption And Assessment For Us Small And Medium Sized Manufacturers, Yadan Zeng
Theses and Dissertations
U.S. Manufacturing sector consumes remarkable amount of energy while the energy efficiency is quite low. Energy consumption of CNC machines is significant and various empirical models have been developed to model the Specific Energy Consumption (SEC) of CNC machines. However, most of the models are developed for specific machines, hence have limited applications in manufacturing industry. In this research, a general empirical SEC model for milling machine at certain power level is developed based on actual cutting experimental data. In this model, stand-by power and spindle power are used in the SEC model for the first time. The Material Removal …
Demand Side Management For Building Energy Efficiency Through Hybrid Daylighting System And Battery Energy Storage System, Tonghui Li
Theses and Dissertations
This dissertation aims to investigate demand side management (DSM) to improve building energy efficiency and reduce on-peak electricity demand. Daylighting device and battery energy storage system (BESS) for peak shaving are proposed and studied. To reduce the cost and improve the efficiency of building lighting, an innovative parabolic trough solar lighting and thermal (PTL/T) system is designed and analyzed. In the proposed system, a parabolic trough collector (PTC) controlled by two-axis solar tracking system is used as solar collector. The collected sunlight is split by a cold mirror into visible light and infrared light. The visible light is reflected by …
Comparative Study Of On-Off Control And Novel High- Low Control Of Regenerative Indirect Evaporative Cooler (Riec)., Yi Chen, Huaxia Yan, Hongxing Yang
Comparative Study Of On-Off Control And Novel High- Low Control Of Regenerative Indirect Evaporative Cooler (Riec)., Yi Chen, Huaxia Yan, Hongxing Yang
Faculty of Science & Technology (THEi)
The main characteristic of an indirect evaporative cooler (IEC) is its dependency on ambient air conditions. To ensure stable indoor temperature and provide better thermal comfort for the occupants, proper control strategy is essential. However, very limited studies report the controller used in IEC. Therefore, two control schemes are comparatively studied for regenerative indirect evaporative cooler (RIEC) application, including conventional on-off control and newly proposed high-low (H-L) control. Under on-off control scheme, the fans are either in operation at constant rated speeds or turned off if the indoor temperature is satisfied. While under H-L control scheme, the fans would be …
Further Development Of A Thermal Comfort Based Fuzzy Logic Controller For A Direct Expansion Air Conditioning System, Huaxia Yan, Yan Pan, Zhao Li, Shiming Deng
Further Development Of A Thermal Comfort Based Fuzzy Logic Controller For A Direct Expansion Air Conditioning System, Huaxia Yan, Yan Pan, Zhao Li, Shiming Deng
Faculty of Science & Technology (THEi)
The primary purpose of A/C is offering occupants with acceptable indoor thermal comfort levels. Thermal comfort is a complicated result of non-linear interactions between six parameters. However, many of current A/C systems solely control air temperature. Whenever anyone of the five parameters other than temperature varies significantly, an occupant may feel thermally uncomfortable. To address the issue, a comprehensive thermal comfort index should be used as regulator in A/C systems. One fuzzy logic controller is available. However, the approach to the fuzzy logic controller is complicated. In this paper, one previous established fuzzy logic controller is simplified for its real …