During the past couple of years running Lost Collective, I've received all kinds of correspondence, good and bad. One of the most rewarding things would have to be when people drop me a line to share their connection to the places I photograph. Not long after I shared the original Wangi Power Station
The hydrogen-cooled 60 MW Parsons
Cooling water screens for the condensers in "B" Station filtered out the aquatic life and other solid objects which would otherwise interfere with the pumps. This screened salt water could then be pumped to the condensers to cool the steam after it had been spent in the turbines. Once the steam had been cooled back to a liquid state, it could then be returned to the system and reused in the boilers.
The image on the left is a view through the dividing area between the turbine and boiler house, during the construction of Wangi Power Station. Photographed by Sam Hood
A photograph from the coal stockpile beside the coal plant, looking towards the "B" Station lift tower. The openings on the right side of the frame are where the bulldozers would push coal onto a conveyor where it would begin its journey to the top of the power station and into bunkers. The building on the far was the main store of Wangi Power Station.
This was a steam driven feed pump used to supply boilers with the water required to generate the steam which drove the turbines (to the rear of where the photographer was standing). Rather than being electrically driven, this pump used steam bled from the turbine for energy. In the background is part of one of the pulverised fuel boilers, meaning this photo was taken somewhere inside "B" station.
The image on the left is looking from "B" Station over the length of the entire turbine hall to the far end of "A" Station. Wangi Power Station consisted of six turbines in total. "A" Station contained three 50 MW Parsons turbo-alternators, while "B" station had three 60 MW Parsons units, giving the power station a total generating capacity of 330 MW. Comparatively, Australia's largest power stations, Eraring
A shot from the "B" Station end of Wangi Power Station, looking over the switchyard. The outlet canal can be seen running from the power station into Lake Macquarie
This was part of a trial feeding system that was being tested at the power station. I have limited information on this, so if you have a better understanding of what was happening here, please leave a comment. Supposedly, this trial was being developed to test the use a coal slurry to as fuel in the "B" Station boilers. The overall shot places the scene between the coal plant and the end of "B" Station. A large hopper looks to divert some of the coal being fed via the main coal feeding conveyor down to a green hopper. From this hopper, the coal feeds to a ball mill before passing through what appears to be some cleaning tanks. The top level of the furthest structure features what appears to be an orange centrifuge which might have been used to separate the water from the pulverised coal particles. Perhaps it was part of a trial to determine if washed coal had a higher efficiency rate than that of the dry, raw processed coal. As I mentioned, I'm hypothesising, but I'd quite like to know the story behind this, so please do get in touch if you know.
Boiler no 2A was one of the six spreader stoker Babcock and Wilcox
Another shot of the high-pressure end of turbine number six. You can just see a couple of operators hiding in the far left of the frame.
What a classic shot. Taken just past the main car park with a Mini passing in front of the tennis courts, which lie between the roadside and the power station itself. This photo was taken looking towards the "A" Station end of Wangi Power Station.
The outlet canal took water recovered from the condensers and returned it to the outlet canal, which ran the length of the entire power station before returning to Lake Macquarie. You can see the roadway of Dobell Drive passing over the far end of the canal.
The "A" Station screens don't look to have fared as well as their newer "B" Station counterparts. The same requirement for filtered salt water was needed for the "A" Station condensers, although the mechanism to filter the water for this side of the power station was of a completely different design. A series of buckets would be pulled up using a chain drive, and then passed over filter screens before being pumped back to the condensers. I'm told the cast iron rollers used in these screens were great material for making engine piston rings.
Looking down the main coal feeding conveyor and over the coal plant from the roof of "B" Station roof. You can just make out a coal delivery truck coming in at the far side of the stockpile. Coal would also be delivered from Awaba Colliery
One of the Parsons Turbines that generated the electricity at Wangi Power Station. The blue, white and chrome colours are from a bygone era in the colour coordination of generating equipment. The generator sets of most modern power stations tend to be one solid colour (and much larger). All the valving and asbestos lagged pipework makes up part of the control system. On the left end of the generator set, you can see the turbine speed indicator on the governor.
The main entrance of the power station is at the bottom left. The ground floor consisted of the apprentice workshop on the left, with nurses station around the corner to the right. The first floor was an electrical workshop. Further up the building was the canteen, which had its own unique Wangi Power Station currency. Executive offices also occupied the higher levels of the building at the end of "A" Station.
Scanned documents from induction packs of the era, which were given to new starters. The first document is a brief overview of the history of Wangi Power Station as well as some technical details including the functions, equipment and generating capacity. The contents of the document are transcribed below.
Wangi Power Station was one of five major stations built on the coalfields by the N.S.W. Electricity Commission
The station was originally designed, and its construction begun by the Railways Department and was completed for the Electricity Commission, formed in 1950 as the State's major electricity generating and bulk supply authority.
Situated near Wangi township on the western side of Lake Macquarie, the power station is the fourth largest in operation on the northern coalfields and it provides power for the State supply system.
Experience shows that it is cheaper to transmit power considerable distances from a power station than to carry fuel to it. Wangi Power Station, therefore, is well situated, being only 7 kilometres from the Commission-owned Awaba Coal Mine. Cooling water, also, is readily available from the nearby lake. Wangi Power Station comprises three 50 000 kW and three 60 000 kW generating units installed at a cost of $60 million.
Like the other five main stations at Liddell (Hunter Valley), Munmorah (Central Coast), Vales Point (Lake Macquarie), Tallawarra (near Port Kembla) and Wallerawang (near Lithgow), Wangi station is part of the Commission's interconnected generating system which supplies most of the electric power in N.S.W.
There are important economic advantages in such large-scale operations, one of them being that the Commission is able to supply all retailing Councils with electricity at a uniform tariff.
The three 50 000 kW units have two boilers per unit, each boiler having a steam-raising capacity of 113 500 kilograms per hour at a pressure of 4 478 kilopascals, and a temperature of 450°C.
These first units use the spreader-stoker system of firing, coal of the required grade being fed by chute to a mechanism which throws it across the furnace on to a travelling grate.
The second section of the station comprises three 60 000 kW turbine generators, each with a single 249 700 kilograms per hour boiler, 6 545 kilopascals at 500°C.
These boilers use pulverised fuel. No grate is required, the fuel being reduced to very fine particles, and fed into the furnaces as an airborne coal dust.
Operation of the older "A" section has declined in recent years. The more modern "B" section makes a substantial contribution to system requirements and consumes up to 1 500 tonnes of coal a day.
Water for cooling purposes is brought in through a horseshoe-shaped tunnel under the hill at the rear of the station and returned to the lake by a 3.5 metre deep open canal.
The chimney stacks are of reinforced concrete, 76 metres high, with an internal diameter at the top of 6 metres.
The station has exterior walls of red brick, rows of--- glass windows, and a precast concrete roof.
The main power station building, 228 metres long, takes up the central portion of the site, with the control room and switchyard in front and a number of stores, workshops and office buildings nearby.
For the whole job, 76 500 cubic metres of concrete, 3 000 000 bricks and 10 000 tonnes of structural steel were required.
A general information document for new starters relating to the Electricity Commission of New South Wales, as it was in 1977.
The present day view from across the former switch yard of Wangi Power Station.