>Internal Combustion Engine>1kW of chemical power generates 0.3 kW of mechanical power>Air Conditioner>1kW of electrical power generates 3 kW of cooling/heating powerwhat the fuck is this sorceryt.mechanical engineer
You aren't generating anything, you're moving it from point A to point B
>>109784439i'm also moving a car from point A to point B
You're using a bit of power to get ambient air and separate the hot molecules and the cold molecules. You heat or cool with one part, and release the rest back to the outside air.In reality it uses refrigerant and evaporative cooling. If you use a lot of gas from a propane tank quickly, the tank gets cold. This principle is used in the refrigerant loop.
>>109784427K let me know when you can propel a vehicle using the latent heat of vaporization
>>109784427>1kW of electrical power generates 3 kW of cooling/heating powerwell YEAH but 3kW of thermal energy outta the food in your fridge PLUS 1kW of electrical power means you're only losing the WHOLE 4kW into the AIR.precious thermal energy AND electrical energy WASTED. Refrigerators are a SCAM. t. another mechanical engineer
0.3 is possible with supercharged dieseling engine but it can continious run like 0.27 fuel power x 0.2 x0.27 ish
>>109784427The electrical energy is used to transfer heat from a cold area to a warm area. Most of the energy in a car is lost to heat. Some is converted to mechanical energy, energy is lost to pumping losses/pulling against a vacuum and various mechanical losses at different stages and wind resistance/aerodynamics
>>109786551It's not 1996 anymore, you should look into what modern engines in hybrid vehicles manage. Most manufacturers are in the 40-50% range for production vehicles now.
>>109785451Old news, vehicles have been built that use backwards open Rankine cycle engines powered by the temperature differential between LN2 and the ambient air.
>>109784439it goes from H to C+W or from C+W to Hi don't know what "it" is there's a definition of heat and workthey're not the same thingso why is "it moving"?
>converting unstructured energy (heat) into structured energy (work)Inefficient due to entropy. Carnot's theorem.>converting structured energy (electricity) to unstructured energy (heat pumping)Efficient.
>>109784427It doesn't generate 3kW. It pumps energy for an effect of 3kW.It is like saying that a regular water pump at 20W pumping water at 20°C (~400K) @ 1000L/h pumps 1000L*400K*4184 J/K*kg = 16MJ so each hour 20W pumps 16MW. But its hard to get all the 400K out of the water. the 1:3 is easier because it only takes a minimal fraction out of the air.
Why don't we use heat pumps for combustion engines.
>>109788457Boats used to have external combustion engines that were heatpumps running in reverse. It sounds nice, no spark plugs to replace.
>>109788457That's what we already do. The heat produced in an internal combustion engine is pumped out into the environment providing work in the process.
>>109788489>The heat produced in an internal combustion engine But that's just from the fuel. Why not take it from the environment like heat pumps do?
>>109784427The 1kW electrical power used by a heat pump doesn't heat or cool directly, the work that 1kW does just moves heat from one place to another (from the outside in, or from the inside out). The actual heating / cooling comes from the surrounding environment.
>>109787208Because you compress and decompress gas and let it exchange heat. What is there to understand.
>>109788500Hot to cold heat transfer results in net work output. Cold to hot heat transfer (ie a heat pump as you imagine) requires a net work input.
>>109784514You're retarded so any explanation to help you out is a waste of time.
>>109787962>heat pumpingbut that's not a form of energy? what you said describes a resistive heater better except the heat pumping part should just be heatingheat pumps don't convert energy
>>109788518>what is there to understand it's not enough to get the right answer yourselfjust what is it that makes today's op so different, so appealing?
