What people have not come up with to increase comfort in their lives! The number of new inventions is constantly growing every year, and we are no longer so surprised when we hear that a tourist phrase T-shirt, a tablet PC, a robot vacuum cleaner or a floating fish farm have been invented. Some of these inventions have made a real revolution, some only cause a smile, but at the same time, there are quite interesting and inexpensive things that can be used in everyday life, making life even more comfortable and enjoyable.
One of these small useful inventions is the cold accumulator. This device is able to store cold for quite a long time. It is a container, inside which there is a substance with a large heat capacity. The principle of operation is as follows: first, the container is placed in a freezer, in which the substance is cooled for a long time to the desired temperature. After that, the device is able to take heat for a long time.
Cold accumulators are used as the maincooling elements in various refrigerated bags. They can also be used in household refrigerators to stabilize the temperature in the chamber. As a result, the compressor will turn on and off less often, the time for safe storage of food during a sudden power outage will increase, and the freezing capacity of the freezers will increase noticeably.
Many craftsmen are interested in the question: "Is it possible to make a home-made cold accumulator?". The composition of the liquid that is poured into the plastic container is therefore of particular interest. In fact, a plastic bottle, a small plastic canister, etc. can be used as a container, there is no problem with this. The main thing is to prepare the right liquid.
If you look for photos that show a cold accumulator, you will notice that the liquid inside it has a characteristic blue color. However, this shade is just the effect of the dye. The main element in the filler is carboxymethylcellulose - a weak colorless acid, which is often used as a thickener in the production of glue, cosmetics, toothpaste, food (as an additive with code E466), etc. In principle, with a strong desire, you can buy it in a package of 25 kg, but it is easier to prepare a home-made substitute.
Theoretically, the cold accumulator will work with any composition, the specific heat of which has a maximum value compared to any other liquid. Here is one of the recipespreparation of such a liquid from improvised means:
1. In one liter of water you need to dissolve the maximum amount of table s alt.
2. All this is poured with three liters of clean water and CMC wallpaper paste is added in such an amount to bring the liquid to a jelly-like state.
3. The resulting composition is poured into two two-liter bottles, which are then placed in the freezer.
The cold accumulator obtained in this way is capable of storing a temperature of -12 ° C, and it can be regulated by changing the s alt concentration. The less s alt you add, the lower the temperature will be.
