Marine Refrigerators – All about Marine Refrigeration How does Marine refrigeration work? The major parts of a DC refrigeration system consist of the refrigerant, a compressor, and a condenser, a cooling system for condenser, and a plate or plates inside the refrigeration box. The compressor belongs to a closed loop pumping refrigerant through the system and through the evaporator plate in the ice box. The compressor has 2 sides the High side or discharge side. The discharge side pumps refrigerant under pressure to the condenser. The suction side or low side and draws refrigerant after it passes through the evaporator plate back to the compressor. The cold plates in the fridge area have either growth valves or capillary tube that separate the low and high pressure sides of the refrigeration system. The refrigerant in the compressor begins as a gas. The compressor compresses the refrigerant gas, from low pressure to high pressure in between 100-150 psi. When the pressure is increased like this its temperature increases considerably. This hot high pressure refrigerant is then fed to a condenser, where it is cooled and developed into a liquid. The condenser is cooled by either air or water. The refrigerant is now a cool high pressure liquid and is fed to an evaporator plate inside the boats fridge box. The evaporator plate takes the refrigerant from the condenser and here it boils rapidly & evaporates back to a gas, at a very low temperature. This change of state soaks up huge amounts of reasonable heat from the evaporator which in turn eliminates heat from the insulated refrigeration box, therefore decreasing its temperature. The BTU is the measurement of heat got rid of. From the evaporator plate the refrigerant is returned to the low side of the compressor, to begin the procedure again. Evaporator or Holding Plates Marine refrigeration systems make use of either an evaporator plate or a holding plate in the boats refrigeration space or freezer space. Each kind of plate works in a different way in drawing heat from the boats fridge and ice box space. Marine Evaporator Marine evaporators are much like the ones found in household refrigerators. They can get quite cold (thermostat setting) and numerous evaporators have the ability to make ice next to the evaporator plate or inside the evaporator box. Evaporators can be found in numerous sizes and shapes; they can be horizontal plates, vertical plates and rolled plates Evaporators are constant cycling, or brief cycle. A lot of make use of a Danfoss aquatic compressor with H134 refrigerant. Thermostat controlled evaporator temperature level. Rely on lower ice box temperature level. Evaporator plates are more economical, but require Continuous power supply. Marine Holding plates
Marine Refrigerator Holding Plates imitate large blocks of ice and the cold temperature level of the holding plate draws heat from the boats refrigeration box. Holding plates can keep ice boxes cold for extended periods. The major benefit of a holding plate over an evaporator is that they only have to be recharged 1 or 2 times each day. This charging can coincide with attaching to shore power, running the engine and so the fridge does not rely on the battery bank. When integrated into an effectively created system, holdover plates can considerably decrease energy consumption. However DC holding plates are likewise possible. The holding plate is filled with an option that has a freezing point listed below 23 degrees F. As the compressor runs, the refrigerant goes through the holding Plates coil, freezing the holding plate solution. The compressor turns of and as the holding plate thaws out, heat is eliminated from the box. Powering the Compressor The power supply to the compressor is among the crucial elements of the boats refrigeration system. Refrigeration is one of the biggest energy consumers onboard, so the power supply is an essential element of the system. Power materials to aquatic refrigeration systems consist of AC, DC, Coast Power, Engine power, and hybrid systems. Hybrids are mixes of say 12 volt and engine drive, or engine and coast power. The whole point in looking at power supply to your boats refrigerator is to combine it into onboard power requirements for all your boats aquatic systems. If you run a generator much of the time then adding on an A/C refrigeration system might make good sense, but unless you do, you would be much better at taking a look at 12 V, engine or coast power. Power can be decided on how you use your boat. Are you bound at a dock for much of the time and take excursions. Or do you cruise and spend large amounts of time at anchor. Lastly are you Power boating or Sailing will certainly also influence power supply. Sailing implies no charging of batteries or power from the engine. Right here a solar panel or wind or towed generator can help renew batteries. If you spend time at the dock, a DC system has plenty of time to recharge on shore power. If you hang out motoring and at the dock and engine drive with coast assist works well. A/C 110 volt marine refrigeration These drop in fridges are like the one in your house and are commonly seen on larger boats with an abundance of A/C power and area. The A/C powers the aquatic compressor, and the condenser is generally air cooled. A dependable A/C supply is needed through a generator. DC aquatic refrigeration with Evaporator plate
One of the most inexpensive aquatic refrigeration system and simplest to set up is the 12 v or DC system. Air cooling is the easiest. The DC system combined with an evaporator plate that is thermostatically controlled provides flexibility over cooling requirements. Lots of 12 volt systems use the Danfoss compressor. With the enhanced performance of the Danfoss compressor, DC refrigeration onboard is getting more reliable, however is still power starving. If you need more information regarding marine refrigerators and marine refrigerators companies, then I strongly suggest that you visit www.thegreenbook.com , they have a wide range of products and services that you can choose from.