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Australian power prices go insane

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(edited)

Hints are not answers for a reason...

learning

Edited by TailingsPond

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8 hours ago, KeyboardWarrior said:

Low heat does not equate to low delta T. It depends on the substance in question. You might want to examine a different cycle for the wood scenario. 

Burning wood pellets rivals burning anthracite. Not at all low heat.

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14 hours ago, TailingsPond said:

At what temp are the products formed?

That's not Hess's law. Hess's law is about summing enthalpies from reaction steps to calculate an enthalpy of formation that's particularly difficult to measure. A great example is carbonic acid. 

For the sake of this argument, what needs to be known are the specific heats of the products (which, by the way, aren't constants. you need to integrate), and the heat released from combustion. We don't need to be summing separate equations for this. 

"Hess's Law of Constant Heat Summation (or just Hess's Law) states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes. This law is a manifestation that enthalpy is a state function."

 

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On 7/28/2022 at 1:51 AM, Boat said:

Kansas is getting a 4 billion battery plant for Tesla. Samsung is the battery builder. We’ll wait and see but that may end up being the biggest yet. 

What's the rate of return on batteries this year? 

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(edited)

2 hours ago, KeyboardWarrior said:

That's not Hess's law. Hess's law is about summing enthalpies from reaction steps to calculate an enthalpy of formation that's particularly difficult to measure. A great example is carbonic acid. 

For the sake of this argument, what needs to be known are the specific heats of the products (which, by the way, aren't constants. you need to integrate), and the heat released from combustion. We don't need to be summing separate equations for this. 

"Hess's Law of Constant Heat Summation (or just Hess's Law) states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes. This law is a manifestation that enthalpy is a state function."

 

Recognize that the products are formed at STP.  Hence the water product has to be heated, boiled, and the steam heated up to the temp of the flame.   Hess law is absolutely relevant when discussing combustion. Heat of vaporization, heat capacity etc. are handled essentially the same way as heat of formation.

You were correct that the energy is leaving the system as steam. This is why acetylene burns hotter with technically less energy than the 2-carbon homolog ethane. 

I'm better than the average Joe at chemistry.  I've done advanced bomb calorimetry in the lab...(20atm O2, benzoic acid, pellet press, etc.).

Edited by TailingsPond
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5 hours ago, KeyboardWarrior said:

What's the rate of return on batteries this year? 

Good enough to get financing with no problem.

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1 hour ago, Jay McKinsey said:

Good enough to get financing with no problem.

I can get financing on plenty of things with no return. What's the ROI? 

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On 7/28/2022 at 2:51 PM, Boat said:

Kansas is getting a 4 billion battery plant for Tesla. Samsung is the battery builder. We’ll wait and see but that may end up being the biggest yet. 

that might be a bad combination............

bought a samsung power bank many years back. It's claimed an original product by the seller, with 5 year warranty.......... I forgot to take it out of the car poach one day and the battery inflated to a close adjective of near explosion, when i returned to the car........

Outsourcing the production might have caused the market share to drop like diarrhea......

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Ironic that Australia has about the best renewable energy resource availability of any place on the planet. What are the Ozzies waiting for?

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I should qualify that. The Ozzies are no longer waiting. But IMHO they could do much, much more and earn much, much more.

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(edited)

3 hours ago, jonathb said:

I should qualify that. The Ozzies are no longer waiting. But IMHO they could do much, much more and earn much, much more.

It would seem the Green Plauge has accomplished extraordinary results. 

Man says high electric bills led to his divorce

By Hamish Spence, News.com.au

August 4, 2022 | 2:10am

 

Fifty-five-year-old Bryn Lawson has accused AGL of using incorrect power meter numbers at his northwest Sydney home, with his latest bill coming in at more than $833.

AGL has apologized to him for the issue and offered credit, but the mistakes keep happening.

“Fix it AGL. Get your s–t together and fix it mate,” an enraged Lawson told A Current Affair.

https://nypost.com/2022/08/04/man-says-high-electric-bills-led-to-his-divorce/

Edited by Eyes Wide Open
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1 hour ago, Eyes Wide Open said:

It would seem the Green Plauge has accomplished extraordinary results. 

Man says high electric bills led to his divorce

By Hamish Spence, News.com.au

August 4, 2022 | 2:10am

 

Fifty-five-year-old Bryn Lawson has accused AGL of using incorrect power meter numbers at his northwest Sydney home, with his latest bill coming in at more than $833.

AGL has apologized to him for the issue and offered credit, but the mistakes keep happening.

“Fix it AGL. Get your s–t together and fix it mate,” an enraged Lawson told A Current Affair.

https://nypost.com/2022/08/04/man-says-high-electric-bills-led-to-his-divorce/

You are really getting desperate. Your post has absolutely nothing to do with Green energy. 

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56 minutes ago, Jay McKinsey said:

You are really getting desperate. Your post has absolutely nothing to do with Green energy. 

Indeed, perception is fleeting with you is it not?

AUD 1 billion has been estimated to have been taken away from the value of solar and wind assets in Australia over the past few years due to the issues associated with the national grid.(2) Australia's estimated average transmission losses are valued at 5%, however those projects in regional or more remote areas can experience losses up to 20-25%.(3) Growing concern over the instability of the grid, as well as a lack of direction in federal energy policy has resulted in investments and investor confidence falling dramatically over the past two years.

Insurance concerns and future prospects

Grid connection issues and delays in practical completion of sites bring about a multitude of insurance-related issues. Before entering full commercial operations, the Australian Energy Market Operator (AEMO) must sign-off and approve all facilities with various final testing and certification requirements. To prevent overloading and the potential collapse of the grid, AEMO has in recent years gone a step further and instructed several solar and wind projects to reduce or cease operations. Where AEMO sign-off is not obtained (i.e. should AEMO have concerns regarding grid capacity once a site begins to generate), project operation will be delayed. Insureds may attempt to claim for such delay on their policies and/or require several policy extensions.

https://www.clydeco.com/en/insights/2021/06/gridlock-in-australia-will-the-renewables-projects

 

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14 hours ago, jonathb said:

Ironic that Australia has about the best renewable energy resource availability of any place on the planet. What are the Ozzies waiting for?

They are waiting for a sign! I think, this is it

https://www.theguardian.com/australia-news/2022/jul/21/pink-sky-mildura-victoria-australia-medicinal-cannabis-marijuana-plant

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On 8/4/2022 at 11:45 AM, specinho said:

that might be a bad combination............

bought a samsung power bank many years back. It's claimed an original product by the seller, with 5 year warranty.......... I forgot to take it out of the car poach one day and the battery inflated to a close adjective of near explosion, when i returned to the car........

 

Outsourcing the production might have caused the market share to drop like diarrhea......

Thanks for sharing your experience with the power bank. I hadn't thought that out. I do cover my solar generator when I am using it but storing it in a car or an unattended trailer might require extraordinary care in very hot or cold weather!

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On 8/1/2022 at 12:42 AM, TailingsPond said:

Efficiency defined as to this circumstance?

Can someone burn anything in a fancy calorimeter and capture near all of its heat? Yes, of course. Your home is not a calorimeter.

Can you explain why acetylene burns hotter than ethane despite having lower energy density? 

Hint: your exhaust contains a lot of energy.

2nd hint: Hess law

Good question about acetylene. I think carbon finds itself in an unusual position of cathode there?

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