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Essay On Energy Consumption

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The overall structure is to calculate the total electricity consumption and convert to CO2 emissions by applying conversion factors of electricity. There are normally two methods for carbon emission calculation (WBCSD/WRI,2004). One is top-down method. Energy consumption data is gathered at an aggregate level, such as annual electricity consumption for the whole company. The other one is bottom-up method in which Individual process can be controlled separately and their energy usage can be measured individually. Generally, the top-down approach can provide more reliable overall emission estimates, but the calculation is usually on a company level. This method could not reflect how the energy is consumed. while the bottom-up technique is …show more content…

Case selection cross docking which make an extension of the original model Data collection
Generally, four types of data will be used in this paper: Data provided by the warehouse Secondary data from government department or green organizations Industrial data from previous research or industrial standard Website
The warehouse provided limited data. A large range of the parameters are estimated from previous research or industrial standard. Data likes the warehouse size, temperature of the storage, the flow of the goods, average inventory level and electricity consumption is provided by the warehouse; Some parameters in the model are difficult to measure, such as U values and emission factors are gathered from government published document. The warehouse related energy parameters, for examples the lighting energy parameters and MHE energy parameter are estimated from previous researchers. The daily temperature for the city is from a weather history website weather database. Data analysis
The data analysis is consist of four parts. The first part will use the model to calculate emission by HVAC, MHE and ligting respectively as well as calculate monthly total emissions. The separate CO2 emissions are used to analyse how warehouse consumes energy; the total emission will be used to compare with the result from the top-down method. The second part will validate the model with the CO2 emission estimated by top-down methd. The third part will calculate the

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