Recent content by partialfracti

This is my new understanding: The refrigerant does not get colder in the evaporator. The refrigerant loses most of its heat in the condenser, and then the refrigerant becomes even colder because of going through the metering device.

What are the other factors to look at than just the simple decrease in pressure? I think that the volume stays constant. Yes; but it's an educated guess. I believe that there must be a pressure drop because the refrigerant changes from liquid to gas. I am aware of the fact that...

Yes; but I don't think that the volume changes when the pressure goes down. I think that all air-conditioners use evaporation to cool the air. In a closed space such as an evaporator coil, I think that the liquid does have to boil to evaporate.

We've all heard of the three states of matter: solids, liquids, and gases. Recently someone told me that there is some sort of state of matter between a liquid and a gas. Does anyone know what he's talking about?

I believe that when refrigerant in an air-conditioner's evaporator boils into gas, the pressure on the refrigerant goes down tremendously. I believe that the drop in pressure on the refrigerant when it becomes a gas causes the temperature of the refrigerant to drop. I believe this because I...

zgozvrm, You have cleared it up well. I get it now.

If the transformer reduces the voltage by half it will exactly the double the current when there is a load on the transformer. Is this correct?

Then why do you say that the current capability and voltage ratio of a transformer is kind of independent?

Before a few days ago I always thought that when transformers decrease the voltage, the transformers increase the current. Then on another thread at Physics Forums, people have told me that when transformers decrease voltage, they don't increase the current. The PFers told me that the...

What is the difference between increasing the current and making more current available to the user?

Why is the way we do it now more practical than building a heating element for 4800 volts? I did not see zgozvrm's response when I posted this. I believe zgozvrm answered my question above.

jarednjames, he means that a furnace is a stationary device, not necessarily always used for heating purposes, but also used for heating purposes.

I am asking about heaters that heat houses (not water heaters, etc.). I am asking about furnaces that heat houses. What is the difference between a heater and a furnace?

Averagesupernova, yungman, and zryn, my conclusion from what I've read from your posts is that the answer to my original question is the following: Utility companies decrease the voltage sent to houses because of two reasons: (1) 4800 volts is an unnecessarily high and wasteful amount of...

That answer does not make much sense to me because the current is what kills a shocked person, not the voltage per se. The transformers increase the current. Ah. I think this is a hint to the final answer.