Transcript Presentation of Chapter 8 Energy Balances

Chapter 8 – Energy Balances
Leonardo Souza
United Nations Statistics Division
The 4th meeting of the Oslo Group on energy statistics
Ottawa, Canada, 2-6 February 2009
General
• Indicative brief outline of Chapter 8
• Detailed annotated outline to be developed after OG4.
• Envisaged that Chapter will be based on:
• the UN technical report “Concepts and Methods in Energy
Statistics, with special reference to energy accounts and
balances” (1982); and
• “Energy Statistics Manual” by IEA/OECD and Eurostat.
• It will focus on the general concepts and principles relevant to
energy balances.
• More technical issues of balances compilation and details on good
practices in the compilation of energy balances will be provided in
the ESCM.
• OG invited to provide comments on the suggested structure and
coverage of the chapter.
Structure
A. Concept and the general format of
energy balances
B. Principles of energy balances
compilation
A. Concept and the general
format of energy balance
General differences between
commodity balances
energy balances
[Specifics of reformatting in Section B]
Description on top-down and bottom-up
approaches:
Is it relevant to include it in this chapter?
B. Principles of energy
balances compilation
Steps from individual commodity balances to overall
energy balances
Conversion of individual fuel data to common energy
units
Balances reformatting
Columns: products or group of products
Rows: flows, which may need to be rearranged (e.g.,
production of secondary-energy products)
Sign changes in the transformation sectors
Different ways in which an overall energy balance
can be displayed.
Recommendations on the various forms of
presentation
B. Principles of energy
balances compilation
Setting an energy value to production of primary
energy.
How to define the form of primary energy in the
energy balance [also affected by discussion on
definition and classification of primary and
secondary energy products]*?
Principles for assigning energy value to primary
energy production
partial substitution method
physical energy content
Primary energy in balances
What currently happens is that countries and
organizations have exceptions to a similar
definition of primary energy
In order to allow flexibility in their balance
formats
In other words, they all have a statistical
definition of primary energy, roughly
meaning:
Primary energy = energy entering my statistical
measurement system for the first time.
Ex: F.29 recommendations
(1) “Primary energy should be used to designate those sources that
only involve extraction or capture, with or without separation
from contiguous material, cleaning or grading, before the energy
embodied in that source can be converted into heat or
mechanical work (para. 29; see also (16) below).”
(15) “The primary energy input to hydroelectricity should be
defined as the energy value of the electricity itself. (…)”
(16)“The primary energy corresponding to the so-called renewable
sources of energy should be defined as follows and applied to the
output of the first stage in an energy-capturing process that yields
a measurable output of heat, electrical or mechanical energy:
(…)”