The U.S. Olympic team is one of a handful that will supply air conditioners for their athletes at the Paris Games in a move that undercuts organizers’ plans to cut carbon emissions.
ACs are heat pumps that use temperature differentials to move heat from one side to another. There are inherent losses there (e.g., moving 1000kJ of heat out of a room might take 500kJ, for 200% efficiency). That excess 500kJ is dumped outside into the world along with the 1000kJvof heat, creating a local heat island effect. That’s why ACs consume electricity, and that’s where the energy goes.
The radiator behind the freezer isn’t mega hot because of advances in insulation that limit the amount of heat that needs to be moved and advances in efficiency when operating in specific temperature regimes. A modern fridge consumes 400kWh a year, which averages out to 1.1kWh/day, or 45W continuous draw. That’s about the same as a laptop charger. But, well, obviously your house is much larger than your fridge. A fridge might average 400L in volume, but your house averages more like 600000L (1500x more).
If you could move heat around without incurring losses, you could use that to construct a perpetual motion machine. Conservation of energy is a thing and entropy always increases.
Realistically the heat added via electricity is likely going to be added to the compressor itself not the radiator so ofcourse the radiator will be cooler. Also, a laptop charger has to convert from AC to DC so they will always consume more than the listed power output.
If we want to really dive into the depth of the subject though, more thermal energy is created, stored, and radiated in heat islands from cars than air conditioning. You’d be hard-pressed to heat the planet via electricity when the sun is really the thing doing all the work here. If the AC is powered via solar it’s a big nothing burger really, especially if the solar panels are in the same geographical area as there would be no exporting energy to different locations.
Now, let’s consider all the cars, planes, and asphalt that will be used for the olympics. Seems to me the best way to reduce the effects of climate change in this scenario is to not have the olympics unless it is walked to.
I don’t think you understand thermodynamics.
ACs are heat pumps that use temperature differentials to move heat from one side to another. There are inherent losses there (e.g., moving 1000kJ of heat out of a room might take 500kJ, for 200% efficiency). That excess 500kJ is dumped outside into the world along with the 1000kJvof heat, creating a local heat island effect. That’s why ACs consume electricity, and that’s where the energy goes.
The radiator behind the freezer isn’t mega hot because of advances in insulation that limit the amount of heat that needs to be moved and advances in efficiency when operating in specific temperature regimes. A modern fridge consumes 400kWh a year, which averages out to 1.1kWh/day, or 45W continuous draw. That’s about the same as a laptop charger. But, well, obviously your house is much larger than your fridge. A fridge might average 400L in volume, but your house averages more like 600000L (1500x more).
If you could move heat around without incurring losses, you could use that to construct a perpetual motion machine. Conservation of energy is a thing and entropy always increases.
Reporter: [REDACTED]
Reason: Breaks Community Rules
Community rules against the laws of thermodynamics 😂
Can you ban people for spurious reports too thx
Realistically the heat added via electricity is likely going to be added to the compressor itself not the radiator so ofcourse the radiator will be cooler. Also, a laptop charger has to convert from AC to DC so they will always consume more than the listed power output.
If we want to really dive into the depth of the subject though, more thermal energy is created, stored, and radiated in heat islands from cars than air conditioning. You’d be hard-pressed to heat the planet via electricity when the sun is really the thing doing all the work here. If the AC is powered via solar it’s a big nothing burger really, especially if the solar panels are in the same geographical area as there would be no exporting energy to different locations.
Now, let’s consider all the cars, planes, and asphalt that will be used for the olympics. Seems to me the best way to reduce the effects of climate change in this scenario is to not have the olympics unless it is walked to.
AC/DC converter losses are on the order of 10%. Negligible, and don’t change the point. Your pedantry is noted and ignored.
This is reddit level cringe lol. You didn’t have to reply to say nothing.
You didn’t have to inject your pedantry everywhere either over 10% losses, and yet here we are.