how does a refrigeration system work, assosiated with hvac?

Question

in the order the components work and what they do

Answer 1

There are 4 components of a refrigeration system. There really isn't a "starting point" because it is a contiuous cycle so I'll start with the compressor. Inside of the system, is a refrigerant, usually R-22 for home systems and R-134a for cars. In the compressor, the refrigerant is compressed to a high pressure, meaning that the gas molecules are closer together. This makes the refrigerant rise in temperature, which is counter-intuative to refrigeration, so the next part of the cycle is the condenser where the refrigerant is cooled (either by the air or cooling water, depending on the size of the system) but the pressure is kept constant due to the uniform size of every part of the condenser. Now the refrigerant is basically at room temperature, under alot of pressure. The next step is the diffuser nozzle, or expansion valve. In this step, the refrigerant's pressure is reduced by flowing from an "pipe" with a small diameter, to one with a larger diameter. The reduction in pressure causes the refrigerant to become cool (think about how propane tanks are always colder than the air outside) (One other note: The reason that refreigerant is used instead of water is that in this cycle you need the refrigerating substance to be a gas, and water is a liquid at cool temperatures). Now that the refrigerant is cold, it passes through an evaporator which is similar to a condenser. The difference is that the function of the evaporator is to transfer heat from the air that you want to cool INTO the cold refrigerant. By transfering heat into the cold refrigerant, the air loses heat (The refrigerant and air try to obtain a common temperature) and thus becomes cold, and is blown into whatever apperatus (be it a freezer or air conditioner) as cold air.

So simple, lol.

Answer 2

How A Refrigeration System Works

Answer 3

This Site Might Help You.

RE:
how does a refrigeration system work, assosiated with hvac?
in the order the components work and what they do

Answer 4

A hvac system has a liquid such as refrigerant passing through it. The refrigerant has properties that make it ideal for heating/cooling purposes. The components of an ac system are: compressor, evaporator, condenser and expansion valve. In the case of cooling, refrigerant circulates through the evaporator coil, the warm outdoor air blows over the coil and the refrigerant changes properties to a high pressure, cool liquid. This liquid then goes to the expansion valve where it becomes a low pressure, low temperature liquid. This cool liquid passes through the condensing coil where room (24 deg C) is blown over the coils. This process transfers the cool air from the coils to the room air (now typically 16 deg C). The refrigerant in the condensing coils warm up to a low pressure, low temp gas where it then travels to the compressor. The compressor turns the low pressure, low temp gas into a high temp, high pressure gas where it then travels to the evaporator coil. The warm outdoor air passes over the coils and returns it to a high pressure, low temp gas....right where we started from. The cycle is repeated. For a reverse cycle ac unit, it cycle can be repeated for heating the indoor air.

Answer 5

There are four main components in a refrigeration cycle.

1.Compressor
2.Condenser
3.Expansion Valve
4.Evaporator

The system usually contained in a piped circuit containing refrigerant and lubricating oil in suspension. The primary component is the compressor, which compresses superheated vapour to high pressure and delivers it via the hot gas line to the condenser where the saturated vapour passes through an air or water-cooled coil condensing to a saturated liquid.

From the condenser the liquid passes to a receiver, which serves a multiple function;
to accommodate fluctuations in liquid flow rate, to provide a liquid reservoir and pump down refrigerant storage during maintenance works.

The saturated liquid then passes along the liquid line where it is subcooled, via heat loss from the pipe. The subcooled liquid is then passed through an expansion device to an area of much lower pressure. As the liquid expands to vapour within the evaporator, it draws the energy of expansion and change of state from its surroundings. Evaporators may cool a space by having the coil directly in contact with the air, or they may act indirectly by cooling a secondary medium such as water as in a chiller.

To complete the process the saturated vapour is drawn back towards the compressor via the suction line.

Answer 6

How Does Refrigeration Work

Answer 7

See the link below. Always remember that the process is an energy pump and typically for every kW of input energy you can move 3 to 4 kW of heat energy from the high temperature end to the low.
I've been an HVAC engineer for 30 years.

Answer 8

Simply you can imagine that, a fluid (refrigerate) undergoing 4 processes.

1. when the fluid compressed.
2. Heat Released.
3. Heat is then adsorb in the systmem
4. Fluid expanded.

it will go through the cycle 1-4 again and again. So... your system is depending on how you want to design. If youwant the heat, you can tap from the 2nd process above. If you want cold, you can take the 4th process. If you want to save energy, you can take 2nd and 4th processed.

If you want to extract the heat power being generated from the compressor and the fluid, you can recycle them to heat up your water heater.