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units-b.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<title>Gates Building Energy Use</title>
<body>
<h1>Gates Building Energy Use</h1>
<table rows=2 cols=1><tr>
<td valign="top" style="width:10em; font-family: lucida, verdana, sans-serif; font-size : 12px; line-height: 130%;">
<p><a href="../index.html">Introduction</a></p>
<p><a target="_blank" href="http://www.cl.cam.ac.uk/meters/tools/wgb-vis/current/">Run Visualisation</a></p>
<p><a href="bugs.html">Bug Reports</a></p>
<p><b>Units and Costs</b></p>
<p><a href="api.html">Raw Data</a></p>
<p><a href="code.html">Demo Code</a></p>
<p><a href="ToDo.html">To Do List</a></p>
<p><a href="versions.html">Previous Versions</a></p>
</td>
<td valign="top" style="padding-left: 10px; border-left: 1px solid #a5a5a5;">
<h2>Units & Costs</h2>
<p>We present energy consumption as instantaneous power, in kilowatts (kW). These are actually based on hourly readings; we can in principle go for much finer time granularity. Often electricity consumption is presented in terms of total energy, i.e. kilowatt hours (kW hr), but presenting this as a time series would just get us back to kilowatt hours per hour, that is, kilowatts.</p>
<p>If it helps:</p>
<ul>
<li>A constant consumption of 1 watt over a year is 8.76 kW hr (call it 10 for convenience).</li>
<li>In the UK electricity prices range around 10 pence per kilowatt hour. </li>
<li> Thus one watt constant for a year is around a pound sterling (and 100 kW constant is £100,000 per year).</li>
</ul>
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