Plastics Engineering - May 2014 - (Page 39)
Equation 5 can be rearranged to emphasize various contributions to the energy requirements:
Es = m(E1 + E2 + E3) + mf (E4 − E1 − E3)
− mfF(E4 − E1 + E3)
References
1.
2.
(Eq. 6)
it is now easier to see the significance of the energy balance, as the first term on the right side of Eq. 6 represents
the energy requirements when no recycling is employed. the
second term represents the energy associated with the
recycling loop if no losses occur. it is obvious if the amount
of energy associated with the reprocessing of the polymer
is less than the energy required to process the virgin resin,
then the amount of energy consumed would be less than
with no recycling. the third term represents the energy
requirements associated with losses in the recycling loop.
Hence, energy savings in the recycling step will be reduced
as a result of the loss of material.
3.
curran, M. a., Ed. 1996. Environmental Life-Cycle Assessment
(Mcgraw Hill, new York).
Horne, r., t. grant, and K. Verghese. 2009. Life Cycle Assessment:
Principles, Practice and Prospects (csirO Publishing, collingwood, australia).
Brandrup, J., M. Bittner, W. Michaeli, and g. Menges. 1996.
Recycling and Recovery of Plastics (Hanser/gardner, cincinnati,
Ohio).
Note: For information about Polymer Processing:
Principles and Design, go to www.wiley.com/WileyCDA/.
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Plastics Engineering - May 2014
Table of Contents for the Digital Edition of Plastics Engineering - May 2014
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Plastics Engineering - May 2014 - Cover1
Plastics Engineering - May 2014 - Cover2
Plastics Engineering - May 2014 - Contents
Plastics Engineering - May 2014 - 2
Plastics Engineering - May 2014 - 3
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Plastics Engineering - May 2014 - Cover3
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