Вакуумные солнечные коллекторы
Vacuum collector
— in a broad sense, all solar collectors that use vacuum-based thermal insulation are called vacuum — including flat models (see the relevant paragraph). However, in our catalogue, only tubular devices that are not related to thermosiphons (see the relevant paragraph) and are capable of operating all year round are included in this category.In all tubular models, the role of absorbing elements is played by specially designed vacuum tubes that transfer solar energy to the water inside and, at the same time, almost do not release heat to the outside. This ensures high efficiency and minimum heat loss. Another important advantage of such devices over flat collectors is their increased efficiency in terms of "receiving" energy: the tubes work well at almost any angle of incidence of sunlight and even in cloudy weather. At the same time, tubular vacuum collectors are also noticeably easier to install. The unit is installed in parts: first the frame, then the heat exchanger housing, then the tubes themselves. And most models allow you to change only individual tubes in case of failures.
If we compare vacuum collectors with thermosiphon ones, then these devices are more efficient. And they can be used for heating (including in the cold season, at temperatures below zero), but they are more complicated and more expensive.