INDEPENDENT NEWS

Metro Sports Facility’s Eco-friendly Energy System A New Zealand First

Published: Tue 26 May 2020 04:36 PM
People in central Christchurch will no longer be watching valuable energy go down the drain with the Metro Sports Facility set to include New Zealand’s first Waste Water Heat Recovery System.
Ōtākaro Limited Chief Executive, John Bridgman, says the location of the Metro Sports Facility on St Asaph Street has made incorporating the eco-friendly energy system possible.
“Showers, sinks, dishwashers, washing machines and even toilets all result in hot water going down the drain. This lifts the temperature of the major wastewater pipe running down St Asaph Street to a useful 17 degrees Celsius. With this system we will be able to capture and recycle this otherwise wasted energy to help heat the pools and building.
“Part of the St Asaph Street wastewater pipe flow will be redirected into a building in the Metro Sports Facility’s car park, where the heat can be extracted through heat exchangers and used to warm the water being supplied to the Facility’s heat pumps.”
First, the sewage will be “screened” to filter unwanted material and enable the flow to pass through a heat exchanger. By using the exchanger, there is no contact between the sewage and the pool.
The wastewater heat recovery system is being supplied by Melbourne-based Environmental Technology Solutions and will cost about $1.5m to install.
Environmental Technology Solutions Director, Rick Edwards, says Waste Water Heat Recovery energy systems have been a big success in the northern hemisphere already.
“This Waste Heat Recovery project will provide significant benefits to the Christchurch community by re-using waste heat energy that has already been paid for to produce approximately 3500kW of energy per annum for heating at the Metro Sports Facility, which is the equivalent of powering up to 2000 homes per day.”
Christchurch City Council Head of Recreation, Sports and Events Nigel Cox says that the innovative heating system is a major step towards removing the word “waste” from wastewater and instead recognising a valuable energy resource.
“It’s great to see Christchurch leading the way with alternative energy solutions, and the Council is grateful for the grant towards the project from the Energy Efficiency and Conservation Authority (EECA).
“To be able to make efficient use of our wastewater for the benefit of the city is an exciting new string to our bow and a really smart investment. The wastewater heat recovery system will save $100,000 a year compared to groundwater sourced heating and help lower greenhouse gas emissions.”
Sewage water is between five degrees and nine degrees warmer than groundwater, so the heat from sewage water is more efficient than that from a cooler groundwater-sourced system.
“The Metro Sports Facility requires a great deal of heating, so the St Asaph Street pipe is in an ideal area by the venue to help deliver a very clever energy system. Council staff have also organised a map that shows the “hotspots”, and how much heat is potentially available at other locations with this renewable energy source,” Mr Cox says.
There will be some disruption to traffic on St Asaph Street (between Hagley Avenue and Antigua Street) while the system is installed in 2021, so contractors can access the wastewater pipe.

Next in New Zealand politics

On Whether This Election Is Already A Foregone Conclusion
By: Gordon Campbell
Newshub-Reid Research Poll Shows National Rising But Labour Still Governing Alone
By: Mediaworks
SFO Files Charges In Relation To NZ First Foundation Donations
By: Serious Fraud Office
Business Leaders’ Confidence Tanks As Top Kiwi CEOs Vent Their Frustrations
By: New Zealand Media and Entertainment
Taking Action To Reduce Waste And Plastics
By: New Zealand Labour Party
On Last Night’s Leaders Debate
By: Gordon Campbell
Dunne Speaks: The Election Campaign Just Grinds Slowly On And On
By: Peter Dunne
Electoral Commission: Candidate And Party Lists Released
By: Electoral Commission
National Releases Its Plan To Restore NZ’s Prosperity
By: New Zealand National Party
The 2020 New Zealand Election Is Not A Foregone Conclusion.
By: Keith Rankin
Overseas Voting Starts On Wednesday
By: Electoral Commission
Politicians To Go Head To Head On Education Issues In Election Debate
By: NZEI Te Riu Roa
New Zealand First Fully Exonerated Of All SFO Charges
By: New Zealand First Party
Links to two judgments in the SFO's NZ First Foundation case
By: New Zealand High Court
Green Party Responds To NZ First Foundation SFO Charges
By: Green Party
View as: DESKTOP | MOBILE © Scoop Media