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Regional energy survey 2003

Report: TR05/31
Author: Emily Wilton (Environet)


This report presents the results of a Regional Energy Survey carried out for the Waikato Region based on the calendar year 2003. The purpose of the survey was to establish baseline energy consumption for the Region and for Hamilton from which to assess future trends in energy consumption.

A variety of sources were used to estimate energy consumption within the industrial, domestic and transportation sectors. These included:

  • Annual kWh data from electricity line companies within the Region.
  • Annual petrol and diesel use data derived from the Local Authority Petroleum Tax data collected by Territorial Local Authorities (TLAs) within the Region.
  • Domestic fuel use data collected for selected urban areas using household surveys extrapolated for 2003, and the region based on census heating and population data.
  • Industrial fuel use and energy consumption data collected directly from industry and from resource consent files and Environment Waikato staff.
  • Data from Statistics New Zealand, the Ministry of Transport and the Ministry of Economic Development.
  • Fuel use data from Tranzrail.

Across the Region, a total of around 109,000 TJ of energy was estimated to have been consumed during 2003. The majority of this was consumed by the industrial sector (73 per cent), with 21 per cent from transport and 6 per cent from domestic heating. Oil products contributed 60 per cent of the energy consumption with natural gas consumption dominating this source. Coal combustion was the second greatest source of energy at 24 per cent.

In Hamilton around 8173 TJ were consumed, comprising approximately 8 per cent of the Regional estimate. The majority of this was consumed by the transportation sector (56 per cent) with domestic heating using 28 per cent and industry 17 per cent. Oil products contributed 56 per cent, with petrol and diesel combustion dominating this source. Electricity consumption was responsible for 40 per cent of energy use within Hamilton.

The total energy consumption per capita for the Region was 305 GJ/person. This compares to 115 GJ/person for Canterbury. The difference occurs as a result of the greater industrial energy consumption in the Waikato (222 GJ/capita compared to around 30 GJ/capita for Canterbury).

Energy use within the Region was estimated to produce around 5991 kilo tonnes of CO2 per year excluding emissions from wood consumption. Estimates related only to energy use and do not include CO2 emission estimates from geothermal power production or non-energy related sources.

Regional Energy Survey 2003
(391 kb, 55 seconds to download, 56k modem)

Table of contents

Executive summary iii
1 Introduction 1
1.1 Purpose 1
1.2 Background 1
2 Methodology 1
2.1 Electricity 1
2.2 Coal and wood use 2
2.3 Oil products data 3
2.4 Conversion factors 5
3 Domestic energy consumption 5
3.1 Electricity (energy consumption only) 5
3.2 Wood, coal, oil and gas consumption 6
3.3 Summary domestic energy consumption 7
4 Transport energy consumption 8
4.1 Vehicle transport 8
4.1.1 Fuel use 8
4.1.2 Energy consumption 9
4.2 Air transport 9
4.3 Marine transport 10
4.4 Rail transport (energy consumption only) 10
4.5 Summary transportation energy consumption 10
5 Industrial energy consumption 11
5.1 Electricity (energy consumption only) 11
5.2 Coal, wood, gas and oil consumption 12
5.3 Summary industrial energy consumption 12
6 Energy consumption across all sectors 13
7 CO2 emissions from energy use 15
References 17
Appendix 1: Areas covered by different network suppliers 19
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