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Renewable Energy - Case Study

PERUP FOREST ECOLOGY CENTRE

Solar panels at Perup Forest Ecology CentrePerup Forest Ecology Centre and Wilderness Lodge is 50 km east of Manjimup in the South West of Western Australia. The centre is operated by the Western Australian State Government through the Department of Conservation and Land Management (CALM), and it was one of Australia's first guided natural science tourism operations. Originally a small research station for studying rare and endangered species of the area, the Centre has recently undergone a major upgrade and now offers school groups, clubs and individuals accommodation and either self-guided or guided tours.

The Centre began using renewable energy in 1996, when they installed a small wind and solar power system, but in 2003 as part of the Centre's upgrade it was necessary to increase the electricity generation and storage capacity. In September 2003 the power system was upgraded and enlarged with thirty 140W solar panels added to the existing 1.6kW solar array, as well as a new 15kVA inverter. The existing 1kW wind turbine was incorporated into the system and a new 105kWh battery bank replaced the original 32kWh bank. The Centre received financial assistance from the Remote Area Power Supply Program, offsetting their outlay on the system upgrade.

Inverter at Perup Forest Ecology CentreWhile the population and energy use at the centre varies seasonally, since the upgrade of the power system the use of the diesel generator has dropped by an average of 40%, providing savings in fuel and in maintenance requirements. The system has been operating well, with only one or two short power cuts due to a generator cut-in problem. According to CALM the best thing about the upgraded system is the constant and reliable supply of power, allowing for increased use of the facilities. Less use of the generator has reduced cost and noise at the facility. The biggest change to the operation of the facility is that the power system is now very reliable, and there is reduced maintenance.

The busiest time at the Centre is from September to November, with the quietest time being December to February, when schools are closed. There is a caretaker on site using power every day and in the busiest time there can be up to 40 people staying there. The Centre has always been conscious of its power consumption, using compact fluorescent lighting and other energy efficient appliances. The appliances purchased for the new facilities have been chosen on the basis of the best option for energy efficiency and price, and have included an energy and water wise washing machine, energy efficient fridges, microwaves and compact fluorescent lighting. The Centre has a gas boosted solar hot water system, uses gas for most of the cooking and wood for heating. And while they do not need to manage their load by scheduling the use of appliances for certain times, the caretaker does use large loads when there is plenty of solar power available, reducing the need for generator cut in. Also, visitors are advised not to bring their own appliances but to use only what is provided and when visitors arrive they are given a talk about being energy efficient.

Technical
Solar Array 4.2kW p
Inverter 15kVA
Battery Bank 105 kWh (C100)
Existing Solar Array 1.6kWp
Existing Wind Turbine 1kW
Existing Diesel Generator 12.5kVA

This case study was developed by the Research Institute for Sustainable Energy at Murdoch University. Both the Research Institute for Sustainable Energy and the Remote Area Power Supply Program are supported by the Australian Government through the Renewable Remote Power Generation Program. This program is implemented by the Sustainable Energy Development Office in Western Australia.