The Bunn Report

The Bunn Report is a series of whitepapers on the burning issues within the water utility industry today.  The most recent Bunn Reports will appear here.  Older reports will be added to the Bunn Report archive.  

Simon Bunn – Chief Technical Officer 

After graduating with a Bachelor of Engineering (Electrical) Simon spent the next 21 years in control systems design, rising to become a partner in The Beca Group in 1999. In 2000 Simon used his experience of control systems and water treatment processes to design the complex software at the heart of the Aquadapt product, the world’s first commercially available real-time pump scheduling optimizer. In 2002 Derceto software for Wellington City was judged the top engineering project in New Zealand by ACENZ. In 2005 Simon was named the “Engineering Entrepreneur of the Year” at the New Zealand Engineering Excellence Awards.  

Measurement and Verification of Energy Performance Contracts

March 18, 2014 | WHITEPAPER

Energy Performance Contracts (EPC) are an alternative financing mechanism to accelerate the investment in energy efficiency or energy conservation measures.  

An Energy Services Company (ESCO) agrees to undertake an Investment Grade Audit to look at opportunities, costs, and returns for a range of energy savings and cost reduction initiatives.  The ESCO not only identifies the areas that can be improved, they also offer to fund the actual implementation of the energy improvements typically by way of loan a that is paid back via the savings - which they will contractually guarantee -  over a 10 to 20 year period. A key element of such projects is how to measure the savings fairly for both the utility and the ESCO.   A US Department of Energy initiative was started in 1994 to “establish international consensus on methods to determine energy/water efficiency savings and thus promote third-party investment in energy efficiency projects.” The resulting document, called the International Performance Measurement and Verification Protocol (IPMVP) was released in 1997 and has been continuously updated ever since.  Derceto use the IPMVP process and have learnt many lessons over the last decade in how to apply it to the water industry.

Download the whitepaper (PDF)


Reducing the GHG footprint at water and
wastewater utilities in the US and the UK

February 27, 2011 | WHITEPAPER

Electricity consumption by water and wastewater utilities typically accounts for three percent of all energy consumption in the US and the UK. With national electricity production exceeding 3,000 million MWh/yr, this represents net annual consumption of about 90 million MWh. Between 90% and 95% of all energy purchased by a water utility is consumed by pumps; at the raw water intakes or wells; at the treatment plants; and at the booster pumping stations. As we will demonstrate, energy efficiency investments can yield excellent reductions in energy consumption and as a consequence also substantially reduce the carbon footprint of the utility. Case history data is presented showing that pump efficiency savings of 5% to over 25% in energy consumption can be achieved, with the inherent accompanying benefit of reducing the GHG footprint of the utilities.

Download the whitepaper (PDF)


Case study

Feb 26 2011

Chuck Weber, Superintendent of Operations, WaterOne, Johnson County, Kansas. 


Latest news

Mar 07 2019

Hunter Water has awarded SUEZ the contract to implement the proven Aquadvanced™ Energy solution, to optimise water distribution throughout Hunter Water’s network in New South Wales, Australia, helping to reduce its energy consumption and environmental footprint.