共查询到20条相似文献,搜索用时 15 毫秒
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The potential of different artificial neural network (ANN) techniques in daily global solar radiation modeling based on meteorological data 总被引:3,自引:0,他引:3
The main objective of present study is to predict daily global solar radiation (GSR) on a horizontal surface, based on meteorological variables, using different artificial neural network (ANN) techniques. Daily mean air temperature, relative humidity, sunshine hours, evaporation, and wind speed values between 2002 and 2006 for Dezful city in Iran (32°16′N, 48°25′E), are used in this study. In order to consider the effect of each meteorological variable on daily GSR prediction, six following combinations of input variables are considered:
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- Day of the year, daily mean air temperature and relative humidity as inputs and daily GSR as output.
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- Day of the year, daily mean air temperature and sunshine hours as inputs and daily GSR as output.
- (III)
- Day of the year, daily mean air temperature, relative humidity and sunshine hours as inputs and daily GSR as output.
- (IV)
- Day of the year, daily mean air temperature, relative humidity, sunshine hours and evaporation as inputs and daily GSR as output.
- (V)
- Day of the year, daily mean air temperature, relative humidity, sunshine hours and wind speed as inputs and daily GSR as output.
- (VI)
- Day of the year, daily mean air temperature, relative humidity, sunshine hours, evaporation and wind speed as inputs and daily GSR as output.
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Identifying and quantifying energy savings on fired plant using low cost modelling techniques 总被引:1,自引:0,他引:1
Combustion in fired heaters, boilers and furnaces often accounts for the major energy consumption on industrial processes. Small improvements in efficiency can result in large reductions in energy consumption, CO2 emissions, and operating costs. This paper will describe some useful low cost modelling techniques based on the zone method to help identify energy saving opportunities on high temperature fuel-fired process plant.The zone method has for many decades, been successfully applied to small batch furnaces through to large steel-reheating furnaces, glass tanks, boilers and fired heaters on petrochemical plant. Zone models can simulate both steady-state furnace operation and more complex transient operation typical of a production environment. These models can be used to predict thermal efficiency and performance, and more importantly, to assist in identifying and predicting energy saving opportunities from such measures as:
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- Improving air/fuel ratio and temperature controls.
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- Improved insulation.
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- Use of oxygen or oxygen enrichment.
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- Air preheating via flue gas heat recovery.
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- Modification to furnace geometry and hearth loading.
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Total energy cost of household consumption in Norway, 1973 总被引:1,自引:0,他引:1
Robert Herendeen 《Energy》1978,3(5):615-630