the space it is being used to cool. It's called the evaporator coil, after all, so the cold liquid refrigerant coming in evaporates and becomes a vapor. As it goes through the expansion valve, the pressure decreases and it turns to a vapor/liquid mixture that is very very cold right before entering the evaporator, but how does it get cold? Even if they could get cold water to drink, they certainly didn’t have anything that could make their food stay fresh for days or even weeks on end. Heat is known to add to refrigerant but does not register in a thermometer, it just changed the refrigerant state (gas … And that brings us to the evaporator, component #4 in the air conditioning circuit and cycle diagram. Well, OK, what's really happening is that heat from the air is flowing into the cold coil with the cold refrigerant . As it goes through the expansion valve, the pressure decreases and it turns to a vapor/liquid mixture that is very very cold right before entering the evaporator, but how does it get cold? After going through the condenser, the refrigerant is a very hot liquid. The cold temperature profile sneaks back towards the can, because the air is such a lousy conductor of heat, so the heat is all coming from the can. How does refrigerant get so cold? By the way, if you have ever turned your car off on a hot summer day when you have had the air conditioner running, you may have heard a hissing noise under the hood. Refrigerant line has ice on it You know how spraying a compressed air duster for a long time makes the can really cold? Freon is the trademarked name for a liquid refrigerant used in refrigerators as well as air conditioners, heat pumps and other appliances used in heating and cooling. What Is Refrigerant and How Does It Help Your Air Conditioner? Travelling along this pressure gradient, the gas expands and does work, and this removes energy from the gas. Both the fridge and the freezer need to be at a specific temperature in order to maintain food safety levels. Refrigerant is a compound typically found in either a fluid or gaseous state. Cold and Hot are Relative terms Cold and Hot are both an experience, a description, a comparison or an emotion. As it goes through the expansion valve, the pressure decreases and it turns to a vapor/liquid mixture that is very very cold right before entering the evaporator, but how does it get cold? After going through the condenser, the refrigerant is a very hot liquid. Heat doesn't flow from cold to hot, so if we want to get the heat out of that refrigerant and put it into 95° F air, we've got to increase the temperature. I believe this because I remember that there is an ideal gas law that states that the Pressure of a gas is proportional to its temperature. But I'm not really understanding how this works in a refrigeration system. Cold is a way to describe the absence of heat in the same way that dark describes the absence of light. How does refrigerant absorb heat when it is cold? That’s because the low pressure in the can quickly lowers temperature. Eventually, your hand gets cold. Lol! Heat transfer only exist at … Well, something similar to that happens in your air conditioner is low on refrigerant. When it gets cold out the refrigerant pressures will drop too low due to the... Read the full article → Refrigeration compressor units that are installed outdoors must have cold weather controls to operate properly and maintain proper temperature in the cooler or freezer during the cold winter season. we blow air over it to speed up this transfer. After going through the condenser, the refrigerant is a very hot liquid. But I'm not really understanding how this works in a refrigeration system. Phase changes are a great way to transfer heat because it takes a lot more heat to cause a phase change (especially between liquid an vapor) than it does to change the temperature of a material. Winter in Chicago can be tough on outdoor commercial refrigeration equipment. That noise is the sound of high-pressure liquid refrigerant flowing through the expansion valve. After going through the condenser, the refrigerant is a very hot liquid. The cold ammonia gas is sucked up by the compressor, and the cycle repeats. How Refrigerators Work. Refrigerant abuse is commonly called “huffing.” The chemical is often inhaled from an appliance, a container, a rag, or a bag with the neck held tightly closed. The compressor does that job and takes it up to a temperature well above ambient (outdoor) temperatures. We need you to answer this question! the space it is being used to cool. Keeping your refrigerator and freezer running properly is important because, if your food is at an unsafe temperature, it can cause you to get sick. the cold liquid then wants to get rid of that cold and starts absorbing heat. Air conditioners work even in places like Phoenix, Arizona, where the outdoor temperature can get to 115° F and above, so the compressor has …