The fins act to distribute heat from the system or absorb heat into the system from the surrounding air depending on the location and purpose of the coils carrying the coolant. In a heat pump system, the fins function depends on which way the heat is being transferred. For an air conditioner, the indoor fins bring heat to the coolant from the air and expel heat at the outdoor fins into the air
cooling
The purpose of the salmonʻs fins is to help the fish guide through the water and be able to swim freely throughout the ocean.
Porpoises have triangular dorsal fins (as opposed to the curved dorsal fins of dolphins and whales). Some species of porpoise have small bumps on their fins, but the purpose of these bumps is unknown.
The coils gather dust and make water (condensate) which feeds mold. Change your furnace filter after you spray the coils down with a weak bleach solution. Use a wet-dry vac to pull the wet dust out of the coils. Be gentle with the coils because folding the fins over will reduce the efficiency of the AC. You will usually find the coils in the furnace plenum. Cleaning the coils will improve the efficiency of the system and remove the source of the stink.
To speed up the transfer of heat energy.
Exchanges heat from the coolant to the air which flows through the fins.
We have a Daikin split type heater/air-conditioner system. These instructions are from the manual with personal procedure used in effecting the cleaning added: 'CLEANING THE INDOOR UNIT AIR FILTER(s) - Be sure to always clean the air filter(s) before use at the beginning of summer and winter. (Dirt and dust caught in the air filter causes a drop in airflow, which leads to a decline in performance.)' I use a vacuum cleaner to suck the dirt from the filter. Then use the bathroom shower head to spray clean the filter further needed. Both vacuuming and spraying are done in the reverse direction of how the air will flow of how the filter is used in the indoor unit. 'MAINTENANCE OF THE OUTDOOR UNIT - Regularly inspect the outdoor unit to ensure the heat exchanger coil (aluminium fins) and fan outlet are not obstructed by vegetation or any other foreign objects. - Clean the outdoor unit heat exchanger coil annually or as required by location or outdoor air quality. The coil may be cleaned by spraying the fins with low pressure water in a downwards direction (ie. simulating heavy rain). Alternatively have the work done by your installer. - Regularly check the paint work of the outdoor unit for scratches or signs of corrosion. Apply touch up or anti-corrosion paint as necessary.' I use a water hose and nozzle to hose down the fins from top to bottom at a angle of around 10 to 15 degrees. Avoid spraying directly towards the fins as there is a fan and motor inside. Also spraying directly into the fins will push the dirt deeper into the coil instead of flushing it out.
Some reptiles possess characteristics which may resemble fins, but no, reptiles do not have fins. Fish have fins. An example of a fin-like structures on a reptile would be a dewlap. This is a flap on skin under some lizard's necks used primarily for territorial and mating displays. Although the fins of fish may be used for these purposes to some extent, the primary purpose of fins is moving through water. Another fin-like structure on a reptile would be a frill around the neck. The purpose of a frill is the same as a dewlap.
Conduction - example: the aluminum fins surrounding electronic devices that produce heat, like diodes or high output coils. These fins conduct heat away from the interior space.
They are endangered because the Japanese are killing them for their fins, which are used as a medical purpose.
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On the outside, the fins of a whale resemble the fins of a fish, because they have evolved for the same purpose. But when you look at a whale skeleton, the fins look like arms and hands. That's because whales are not fish, they are actually mammals that have evolved from land-dwelling creatures with four legs.