Shelves should be ordered from lowest cooking temperature to highest, going down. This is done to prevent juices or other liquids from higher temperature cooking foods from contaminating foods that won't reach that temperature.
Always store ready-to-eat foods on the top shelf to prevent possible cross-contamination of bacteria from raw foods. Arrange other shelves by cooking temperatures (highest cooking temperature on the bottom). Thermometers: Keep at least one accurate thermometer in the warmest part of the refrigerator.
1. Store raw food like meat, poultry, fish, sausages, bacon etc., in the bottom part of the fridge so that juices cannot drip on foods below. 2. Store ready-to-eat foods such as cooked meats, pies and dairy products such as cheese, butter, cream and yoghurt in the top part of the fridge.
The simple refrigeration cycle consists of four main processes: compression, condensation, expansion, and evaporation. These processes take place respectively in the compressor, condenser, expansion valve, and evaporator.
When I'm ready to fill up the fridge again, I add the meats back in first because I don't want those sitting out any longer than they have to. The fruits and veggies go back into their designated drawers. Then I fill in the top and middle shelf with our drinks, snacks, leftovers, breads, etc.
Always keep raw and cooked food seperate
It's important to keep raw and cooked foods apart, ideally with the former in the coldest bottom drawer of the fridge and the latter on the top shelf. Remember to keep each in sealed packaging or containers too.
Because bread's inherent moisture is part of what makes it so delicious, putting bread in any dry environment will expedite its aging (and staling) process. If you want your bread to last as long as possible and not dry out, absolutely do not store it in the fridge.
It is vital that your refrigerator operates at the appropriate temperature, which for food refrigeration is between +1° and +4°C. Freezers should be kept at -18°C or below. Make sure you have a reliable fridge thermometer. It is not enough to focus on the temperature at which you store food on your premises.
The operating sequence is as follows: (1) Thermostat calls for refrigerant. (2) Liquid line solenoid valve opens, allowing refrigerant to flow. (3) Pressure control makes the control circuit and the condensing unit operates. (4) The coil temperature falls to approximately 20°F and the evaporator fans come on.
In 1834, the first working vapor-compression refrigeration system, using the same technology seen in air conditioners, was built. The first commercial ice-making machine was invented in 1854. In 1913, refrigerators for home use were invented. In 1923 Frigidaire introduced the first self-contained unit.
Top Shelf: Ready-to-eat foods, such as leftovers, ready meals, deli cooked meats, and sandwiches, should go on the upper shelves so they are the furthest away from the bacteria of the raw foods on the lower shelves. Middle Shelf: Next, dairy and eggs should go in the middle shelf.
Keep your appliances at the proper temperatures.
Keep the refrigerator temperature at or below 40° F (4° C). The freezer temperature should be 0° F (-18° C). Check temperatures periodically. Appliance thermometers are the best way of knowing these temperatures and are generally inexpensive.
Arrange by proper food storage order
Although it may not seem like it would matter, the wrong order of food on shelves could potentially promote the growth of pathogens, increasing the risk of foodborne illness. Shelves should be ordered from lowest cooking temperature to highest, going down.
Store raw food separately from cooked food
Always store raw food in sealed or covered containers at the bottom of the fridge. Keep raw foods below cooked foods, to avoid liquid such as meat juices dripping down and contaminating the cooked food.
Refrigerator Storage: Refrigerate eggs at 40°F or less. Store them in their original carton on an inside shelf and away from pungent foods. The temperature on an inside shelf remains more constant than one on the door, which is opened and closed frequently.
But where in the fridge matters. Milk, no matter if it's whole or skim, is best kept at around 37°F, which, depending on your fridge, usually means somewhere in the back on a lower shelf. You may need to store the milk on its side so that it fits easily. Avoid keeping milk in one of the door's shelves.
Food that does not require reheating or cooking and can be readily eaten is placed on the top shelf of a refrigerator. Cooked food that requires reheating should be arranged on the middle shelf. The bottom shelves are suitable for raw meat that is yet to be cooked and served.
As the name suggests, the refrigeration process is a cycle. We start at the compressor, go through the condenser, then through the restriction, then through the evaporator and finally back to the compressor where the cycle starts all over again.
All CFCs and HCFCs must be recovered before opening a system for service or disposing of appliances. The need to conserve or recover refrigerant has led the industry to develop a specific terminology defined by three R's: Recovery, Recycling and Reclaiming.
The bottom line
Refrigerating food is a preservation technique that slows the growth of bacteria. Keep your refrigerator at 41ºF (5ºC) or below, and store foods in order of their minimum internal cooking temperature, with those that require the highest on the bottom.
When the ketchup bottle is unopened, refrigeration has a negligible impact on its longevity. However, once the bottle is opened, the introduction of air can expedite its deterioration. Hence, refrigeration may help maintain the quality and flavor of the product following the initial opening.
Eggs should be kept in a fridge as they need a constant temperature. The fridge is the only place in the kitchen that you can guarantee this. If you can maintain a constant temperature elsewhere in the kitchen then you could keep the eggs there.
Never keep your bread in the fridge. The starch molecules in bread recrystallise very quickly at cool temperatures, and cause the bread to stale much faster when refrigerated. Shop-bought loaves should be kept in an air-tight plastic bag at room temperature rather than in the fridge.