• Energy Demand

    - Data Collection

    - Data Estimation

    - Data Analysis

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Methodology for Determining the Energy Demand

The method for determining energy demand in rural locations can be broken down into three constituent parts: Data Collection, Data Estimation and Data analysis. We have developed a series of flowcharts for determining and collating the energy demand; from which a better understanding of the energy usage can be obtained. The flowcharts are primarily based on CIBSE preliminary audits.

Data Collection                                

Figure 1. Data Collection Flowchart

 

Monthly and quarterly invoices should be collected for the full audit year for electricity, mains gas and fuels supplied in bulk. In rural locations mains supply gas is not always available, therefore fuels supplied in bulk – such as kerosene, propane, butane and gas oil – tend to be more common.

Table 1. Typical Net Calorific Value for Bulk Fuels

Fuel	Fuel Type	Net Calorific Value (kWh/m3)
Class C2	Kerosene or Burning oil	12.11
Class D	Gas oil	11.86
Class E	Light fuel oil	11.13
Class F	Medium fuel oil	10.97
Class G	Heavy fuel oil	11.19

It is important to note that bulk fuels delivered at the end of the year prior to the audit year should also be included and that a delivery at the end of the audit year can usually be excluded. For electricity and natural gas, all metering and supply points should be identified from the invoices and all supplies accounted for. It is important to note any estimated readings and if there are more than two estimates in the audit year additional invoices with real readings should be collected for comparison.