Aquaculture Projects

In Australia, there are many species of seafood that are now grown and produced on farms. Most if not all of these species start their life in a hatchery.

Using Toyesi’s Trident heat pumps during the breeding and grow-out stages can really make the difference. Some species can really benefit from continued environmental and temperature control right through the farming-to-customer process.

We have worked with Zoos, Universities, Aquariums and Farmers covering a wide range of species including Oysters & Shellfish, Barramundi, Trout, Crayfish, Marron, Lobsters, Eels, Atlantic Salmon,  Perch, Catfish, Crocodiles,  and a lot of research projects with an even wider range of species.

Aquaculture Research – Reef Fish Temperature Study

Aquaculture Research – Hunting Squid CO2 Study

Following are some other sample aquaculture projects:

Broodstock holding tanks.

Barramundi are kept in holding tanks and a Toyesi Trident Aquaculture Heater Chiller heat pump is used to maintain around 28^oC to 30^oC.

To assist the control of breeding conditions these tanks can be dropped to cooler temperatures of 23^oC to 24^oC once or twice a year.

Thus simulating artificial seasonal changes to stimulate extra breeding season.

Client issue

• Looking primary to control winter water temp at around 24^o
• Outside ambient temperature down to -2^oC at night
• Insulated enclosure (shed) around 19^oC ambient
• Over 150,000 Liters of water in system
• 5% of water lost as waste each day (5% make up water)
• Required around 50kW of heating

Solution

• Installed a “TAC1200 SSD Ti” Toyesi Trident Aquaculture heat pump with Titanium heat exchanger into the system. Rated at 58kW heating at 15^oC
• When in line with filter system the pressure drop was too great for the require tank water flow in this project.
• The fix was to operate the heat pump directly with the water sump – problem solved
• Plant area had to be set up as an indoor model with humidity control.
• “Fish Happy” = “Client Happy”

Toyesi’s Trident Aquaculture are ideal for trout farming used mostly as chillers, and it may pay to get a dedicated chiller due to the low temperature many trout’s require.

Client issue

• To maintain 20^oC in winter and 26^oC in summer.
• Out-door heat pump solution
• 2 x 12,500L Polyethylene tanks & 1 x 11,500 bio filter tank.
• 1% of water lost as waste each day (1% make up water)
• Required around 9kW chilling in summer and 14kW heating in winter

• Solution

  • Installed a TAC300SSD Ti Toyesi Trident Aquaculture heater/chiller heat pump with Titanium heat exchanger into the system. Rated at 14kW heating & 10kW chilling.
  • The heat pump was fitted in line with filter system with no issue – problem solved
  • “Fish Happy” = “Client Happy”

Australia has over 550 oyster growers & farmers mostly concentrated from lower Queensland down the east coast of New South Wales, Tasmania and in South Australia.

Australian oyster growers farm three species of oyster in Australia’s coastal waters:

• Pacific Oyster (Crassostrea gigas sp.) in SA, Tas and some in NSW
• Sydney Rock Oyster (Saccostrea glomerata sp.) in NSW, QLD and some in WA
• Angasi (flat) Oyster (Ostrea angasi) in small volumes across all states.
• The Milky Oyster (Sacostrea cucullata) and the Blacklip Oyster (Striostria mytiloides) are also found in small volumes.

For best growth an oyster needs relatively clear water with a salinity less than 35ppt, pH between 6.75 to 8.75, temperature between 14 – 30oC (Sydney Rock) and 10 to 18oC (Pacific), and low concentrations of metal compounds.

Source: Oysters Australia.

• Spawning Oysters can be a tricky process with water temperature control critical during this process.  The Sydney Rock Oyster commonly is held at 24^oC and once acclimatised allowing the water to increase to 30^oC over at least 30 minutes. This temperature control is ideal for a Toyesi Trident Aquaculture heat pumps.

Client issue

• To maintain 25^oC in winter and 26^oC in summer.
• 1-phase power restrictions
• Out-door heat pump solution
• Located on the coast with high salty air environment
• Repeat client with expansion project

Solution

• Installed a TCL175SSDs-Ti in 2011 & TCL250SSDs-Ti in 2016 Toyesi Trident Aquaculture heater/chiller heat pump with Titanium heat exchanger into the system.
• Special 316 marine grade chassis upgrade and baked epoxy coil coating to prevent environmental corrosion.
• Special extended surface, Manual cleanable, titanium heat exchanger.
• “Shellfish Happy” = “Client Happy”