Alaska aquarium using seawater for heat

tay

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May 20, 2012
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In another sign of the global shift from fossil fuels toward innovative clean energy solutions, an Alaska aquarium has switched to a heating system that runs on seawater.

The Alaska SeaLife Center (ASLC), a public aquarium, research center, and wildlife rehabilitation facility in Seward, Alaska, announced this week that it has successfully transferred 98 percent of its heat supply from fossil fuels to an alternative system that uses ocean water and carbon dioxide (CO2), a shift that the aquarium’s management hopes will lower operational costs and greenhouse gas emissions.


Using seawater for heating? Alaska aquarium takes the plunge. - CSMonitor.com
 

captain morgan

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In another sign of the global shift from fossil fuels toward innovative clean energy solutions, an Alaska aquarium has switched to a heating system that runs on seawater.

The Alaska SeaLife Center (ASLC), a public aquarium, research center, and wildlife rehabilitation facility in Seward, Alaska, announced this week that it has successfully transferred 98 percent of its heat supply from fossil fuels to an alternative system that uses ocean water and carbon dioxide (CO2), a shift that the aquarium’s management hopes will lower operational costs and greenhouse gas emissions.


Using seawater for heating? Alaska aquarium takes the plunge. - CSMonitor.com


Hopes?

You'd kinda think that a research center wouldn't roll the dice on 'hopes'
 

Dixie Cup

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Sep 16, 2006
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If it works - terrific! But hard pressed to sell a technology like that the land-locked populated areas unless you use "pipe lines" LOL


JMO
 

petros

The Central Scrutinizer
Nov 21, 2008
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They are heating with electricity, not seawater and CO2. CO2 doesn't compress and decompress on its own.

These systems are known as heat pumps and are nothing new, nothing special and not really economic due to the short service life of the heat pump.

But wow, that's amazing.
 

MHz

Time Out
Mar 16, 2007
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If it works - terrific! But hard pressed to sell a technology like that the land-locked populated areas unless you use "pipe lines" LOL


JMO
The land locked version is slightly different and it doesn't have to deal with corrosive salt water. This method would work for the aquarium place also and installation could be part of the foundation work. The currents in the ocean could provide electricity by spinning some sort of prop connected to a gen set the size of the ones found in wind turbines today.

 

petros

The Central Scrutinizer
Nov 21, 2008
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Geothermal kinda sucks. It can't handle a rapid drop in temperature and you still end up using gas or electric.
 

MHz

Time Out
Mar 16, 2007
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Pipelines are dangerous... Shipping sea water by rail is probably the way to go
Is that different from shipping dry salt and adding it to water at the location? They could capture the corrosion as energy, electric energy from what is basically a salt water battery, how novel and how lucky for Israel as she has the most potent salt water around as found in the Dead Sea water. Enough that they could power the Mid-East, Africa and a good portion of the EU from a facility built at the location of the Sea.

Geothermal kinda sucks. It can't handle a rapid drop in temperature and you still end up using gas or electric.
What it does do is use 'reusable heat' to take care of the differences within a certain range. The heating would have to be supplemented but at least you are only using enough for a 10deg change in temp rather than a 50deg change. In the summer the natural temp of the 'bedrock' would be close to air conditioned temp and if you needed it colder the cool ground could be used to cool the air before it is used in the air-conditioner/fridge/freezer devices and the saving is realized by lowering the amount of degrees that the 'air' has to be heated/cooled before it is 'usable'.
This basic system is also quite suitable to use with insulated heat sinks so the warmer/colder 'air' can be used to bring the 2 heat-sinks up/down to their temps. In Canada the cold one could be lowered to -40 in the winter and that would be used to aid cooling in the summer. Heat trapped in the summer could be used to heat water year round as well as supplement the warming in the winter which would lower you heating bill from 'the grid'.

This is why geothermal would be unsuitable in the Arctic. Couldn't the data be used to show the warming stages compared to 'frost' or is this an indication of how long ago the frost came to the area and that dept seems to indicate it will be around for some time to come before the north is 'ice-free' again.
https://en.wikipedia.org/wiki/Permafrost#Base_depth

Base depth

Permafrost extends to a base depth where geothermal heat from the earth and the mean annual temperature at the surface achieve an equilibrium temperature of 0 °C.[26] The base depth of permafrost reaches 1,493 m (4,898 ft) in the northern Lena and Yana River basins in Siberia.[9] The geothermal gradient is the rate of increasing temperature with respect to increasing depth in the Earth's interior. Away from tectonic plate boundaries, it is about 25 °C per km of depth (1 °F per 70 feet of depth) near the surface in most of the world.[27] It varies with the thermal conductivity of geologic material and is less for permafrost in soil than in bedrock.[26]
Calculations indicate that the time required to form the deep permafrost underlying Prudhoe Bay, Alaska was over a half-million years.[25][28] This extended over several glacial and interglacial cycles of the Pleistocene and suggests that the present climate of Prudhoe Bay is probably considerably warmer than it has been on average over that period. Such warming over the past 15,000 years is widely accepted.[25] The table to the right shows that the first hundred metres of permafrost forms relatively quickly but that deeper levels take progressively longer.

It will be interesting to see if the frost melts starting below and moving up or starts at the top and moves down like it did during the ice-age or does it just need more cold days in a year than melting days?
 

lone wolf

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Nov 25, 2006
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If it works - terrific! But hard pressed to sell a technology like that the land-locked populated areas unless you use "pipe lines" LOL


JMO
Not all that hard. You can draw off latent heat from earth just as easily as you can draw it from seawater - cool too so you have air conditioning from the same source
 

tay

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May 20, 2012
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Not all that hard. You can draw off latent heat from earth just as easily as you can draw it from seawater - cool too so you have air conditioning from the same source

Toronto has a cooling system ....

The system was built by ACCIONA Infrastructures to offer a sustainable, alternative source of air conditioning by using cold water from the depths of Lake Ontario to cool downtown Toronto office buildings.

The permanent reservoirs of dense, cold water at the bottom of Lake Ontario are replenished each winter, ensuring this solution will always be viable. Additionally, since the City of Toronto DLWC solution uses water that had already been earmarked for potable water consumption, and therefore does not push the heated, processed water back into the lake, it is an entirely sustainable solution for air conditioning. Because the water is from the depths of the lake (83 meters deep), it is free of odors and impurities, reducing the need to chemically treat the water for drinking. The DLWC system also avoids nearly 45,000 kilograms of chlorofluorocarbon (CFC), a common refrigerant used in standard air-conditioning systems, which has been found to deplete the ozone layer.


Deep Lake Water Cooling System