Emergy Accounting and CO Emissions: Accessing and ... · 1.0X104g/student h Whhh hh hh hhhhhhh...
Transcript of Emergy Accounting and CO Emissions: Accessing and ... · 1.0X104g/student h Whhh hh hh hhhhhhh...
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Emergy Accounting and CO2 Emissions: Accessing and Remaining in the Physical and in the Virtual Learning
Environment
Prof. José Hugo de Oliveira Instituto Federal de Educação, Ciência e Tecnologia do Sul de Minas Gerais Profª. Drª. Cecília M.V.B. de Almeida Universidade Paulista
Programa de Pós-Graduação em Engenharia de produção
Laboratório de Produção e Meio Ambiente (LaProMA)
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About 6,000 “local” students and about 7,000 “Distance Learning” students altogether;
13 different high-school/technical integrated
“classroom & hands-on” courses and 16 post high-
school “subsequent” technical “distance teaching”
courses through over 40 support poles (each one in
a different city)
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Motivation
Nature is generous and bears with the effects of human’s exploiting it.
Renewing itself may take longer than a whole generation
could possibly stand waiting.
Are students really taking the chance and profitting from environment’s investment in resources and suffering impacts to make up their “schoolday”?
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Aims of this work:
To calculate the environmental cost and CO2 emissions caused by the use of energy by the students at accessing and staying in the learning environment during a typical “school day”.
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Methodology
Emergy Environmental Accounting (Odum, 1996) is a methodology which allows for the accounting of natural and economic resources inputs of a system;
Solar energy Joules (seJ): a common basis unit for accounting different types of energy systems;
Transformity:the energy-to-eMergy conversion factor;
Higher transformity values: more complex production systems; higher quality product or service
Lower transformity values: indicate simpler and, therefore, more efficient systems.
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CO2 Emissions using thermo-electricity: a simulation
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Analyzing the results:
ENVIRONMENTAL INVESTMENT IN EMERGY :
ACCESSING AND REMAINING IN THE VLE= 4.48E+12 sej/student ACCESSING AND REMAINING IN THE PLE= 1.56E+12 sej/student - CO2 EMISSIONS :
ACCESSING AND REMAINING IN THE VLE = 3.9x102g/student (hydro-electricity) 2.3x103g/student (thermo-electricity) ACCESSING AND REMAINING IN THE PLE = 1.0X104g/student
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