issue no.8 may 2015 newsletter - new zealand geothermal ...€¦ · the five-yearly world...
TRANSCRIPT
GEOTHERMAL HEAT-PUMP ASSOCIATION
OF NEW ZEALAND
NEWSLETTERISSUE No.8 May 2015
IN THIS ISSUE
Ÿ CHRISTCHURCH GROUNDWATER ENERGY SEMINAR: 12 June 2015
Ÿ REPORT BACK FROM THE WORLD GEOTHERMAL CONGRESS 2015
Ÿ WHEN IN MELBOURNE: VISIT A MONITORED HEAT PUMP INSTALLATION
Ÿ SHOULD A NZ GEOHEAT STRATEGY INCLUDE GROUND-SOURCE HEAT PUMPS?
Ÿ DISTRICT ENERGY SCHEMES
GHANZ EVENT: CHRISTCHURCH GROUNDWATER ENERGY SEMINAR: 12 JUNE 2015You are invited to an afternoon seminar and networking event this month in Christchurch. The seminar will include Christchurch specific aspects such as aquifer modelling, system design, regulatory aspects and connections with the Australasian chapter of the International Ground-Source Heat Pump Association (IGSHPA).
Come and join us at the Russley Golf Club Function Centre, Memorial Avenue, Christchurch from 1.30pm to 5 pm. Admission is free for general public, and we ask professionals and technical attendees for a cash donation of $20 at the door please to help cover costs.
Thanks to Central Heating New Zealand, in conjunction with Climaveneta and the Hydrological Society of New Zealand for sponsoring.
Thanks to our technical organisers Zeb Etheridge, Huw Williams and Helen Rutter as well as Imelda at Central Heating New Zealand for administrative support.
More details can be found on the or GHANZ website download the workshop flier.
See you there.
REPORT BACK FROM THE WORLD GEOTHERMAL CONGRESS 2015 The five-yearly World Geothermal Congress (WGC) was held in Melbourne in April 2015. New Zealand co-hosted this event with Australia, and wow did we have a strong
presence. There were over 250 attendees from New Zealand, many presentations, and a fabulous pavilion coordinated by New Zealand Trade and Enterprise.
A major focus of the conference was on the development and management of conventional geothermal resources, like those we have in the central North Island. However, there were also numerous presentations on ground-source/geothermal heat pumps over the five days of the conference. These had both a technical focus, and looked at markets and trends. All scales of use were discussed, including residential and commercial installations, as well as district heating schemes.
If you are interested in taking a look, the conference papers can be accessed using the International Geothermal Association conference paper database.
WHEN IN MELBOURNE: VISIT A MONITORED HEAT PUMP INSTALLATIONBy Anya Seward And Melissa Climo
While in Melbourne for the World Geothermal Congress, we had the chance to tour a monitored ground-source heat pump installation and research study at the Elizabeth Blackburn School of Sciences (figure 1). This 120 kW system was installed between March 2013 and March 2014, as part of a Research and Demonstration project funded by the Victorian State Government's Department of State Development, Business and Innovation.
Figure 1: Tour group of the Elizabeth Blackburn School of Science, attended by Melissa Climo (centre-left) and Anya Seward (far right).
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GEOTHERMAL HEAT-PUMP ASSOCIATION OF NEW ZEALAND
2A new 2-storey school building of approximately 1500m was built in 2014 with twenty-eight 50-metre deep borehole Ground Heat Exchangers (GHEs) were installed (figure 2) to provide heating and cooling energy for the school. The building is being used as a full-scale experiment to study the behaviour of GHEs under real-life thermal loads. Nine of the GHEs are extensively instrumented to monitor their thermal performance, while an additional eight monitoring boreholes were installed to study thermal influence of GHEs in the ground adjacent to the building.
Figure 2: A plan view of installed GHE’s and monitoring boreholes.
The system is continually monitored both on-site and remotely. Results show interesting recovery rates for ground temperatures, with the cooling and heating demand draining the soils 1-2 ºC during the week, but allowing the ground temperatures to fully recover on the weekend.
Figure 3: The control centre on site, GHEs can be turned off or on, and effects on other GHEs can be monitored through the monitoring panels [Olga Mikhaylova & Anya Seward].
More information is available in and on Olga’s WGC paper, some online articles.
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SHOULD A NZ GEOHEAT STRATEGY INCLUDE GROUND-SOURCE HEAT PUMPS?
This is an open question for GHANZ members and other interested parties.
New Zealand has abundant geothermal resources, from the high temperature hydrothermal resources located primarily in the central North Island, to numerous small thermal springs, to the nationwide ground energy accessed by geothermal / grounds-source heat pumps.
Diverse organisations and individuals with an interest in this energy source have a common goal of increasing the use of geothermal resources in New Zealand. There is growing interest in the direct use of geothermal energy with drivers including renewable energy growth, employment and economic development, and healthier homes and workplaces. Yet, there is no agreed strategy and little coordination of effort across and within industry and government.
This is set to change with the development of a geoheat strategy for New Zealand. It is intended for this strategy to sit under the auspices of the NZ Geothermal Association and to provide a framework for a coordinated approach to drive the increased utilisation of geothermal resources.
Geothermal heat pumps are somewhat unique in this space. While geothermal resources are being accessed (ground energy), these are not ‘traditional’ geothermal resources as they are commonly understood.
With this in mind, should we include geothermal / ground-source heat pumps in this strategy? If so, what are some of the key outcomes this strategy should acheive? Or should we remain separate and drive our own GHANZ strategic objectives forward?
We'll be at the Christchurch event to canvas your thoughts; or please let us know your ideas at [email protected].
GEOTHERMAL USE DATABASEDont forget to update us with new installations to include in the Geothermal Use Database
Please email Anya at: [email protected] or use the GHANZ email address.
GEOTHERMAL HEAT-PUMP ASSOCIATION OF NEW ZEALAND
Are you aware of larger scale initiatives around district energy ?
There is some interesting material on district energy schemes in cities under the United Nations Environmental Programme.
In Sydney there is significant use being made of the harbour water for energy purposes. Currently in development is the 72 Mth Barangaroo District Scheme. (see image)
Some interesting slides of the development can be downloaded from the district energy website .
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DISTRICT ENERGY SCHEMESHow long will it be until the Auckland CBD embraces a scheme of this nature?