Laying the heat tracing cable in the pipe can avoid affecting the operation of the pipe network because of the pipe freezing. The size and structure of the pipe for laying the heat-tracing cable is exactly the same as that of the ordinary heat preservation pipe. The outer wall of the special heat-tracing cable scarf steel pipe is laid in parallel with it, and the point heat is used to heat the medium through the steel pipe. The heating power zui of the cable is large at the moment when the cable is energized, and the resistance of the PTC memory material in the cable increases gradually with the increase of temperature, so the working current and electrothermal power gradually decrease, until the heat loss of the heating power compensation system makes the temperature of the system in a stable state. When the ambient temperature decreases, the cable power increases automatically and the loss is compensated automatically, so that the system is in balance at the new temperature. This kind of compensation heating method is energy-saving.
What a girl who is afraid of cold in winter must have is a half-body black down jacket. Such a thick long dress can be worn even if you choose a delicate inner jacket. If you wear a hat and mask now, you are a passer-by. As a girl in the entertainment industry, how can she be confined to such a simple design? Li Qin is warm with a thick scarf around his neck. The soft color makes it soft and elegant. Choosing a bag with fresh colors will emphasize the contrast of the overall wear and reduce the aesthetic of fashion.
Second, use the shop window and red scarf radio station to publicize the knowledge of “entering the Dragon Boat Festival folklore” to the students, and introduce the Dragon Boat Festival traditional customs such as hanging white mugwort, hanging calamus, sachet, wearing purse, packing zongzi and so on from a scientific point of view, which not only let students understand the folk culture of Dragon Boat Festival, but also educate students to enhance their daily life knowledge.
6. The joint shall be foamed and insulated on the spot. 7. The welding of jacket pipe should follow the principle of perfecting means and strengthening acceptance. two。 The construction operation of casting method should meet the following provisions: 1) the sundries and oil stains on the joint pipe should be removed before welding. 8. Sand filling, soil return 9. Engineering acceptance problems that should be paid attention to in the design and construction of polyurethane thermal insulation directly buried heating pipe: OK. The size and structure of the pipe for laying the heat-tracing cable is exactly the same as that of the ordinary heat preservation pipe. The outer wall of the special heat-tracing cable scarf steel pipe is laid in parallel with it, and the point heat is used to heat the medium through the steel pipe. When the heating power of the cable is just turned on, the resistance of the PTC memory material in the cable increases gradually with the increase of temperature, so the working current and electrothermal power also gradually decrease, until the heat loss of the heating power compensation system makes the temperature of the system in a stable state.
Not as dull as the black suit, this low-key light color, put on behind a bit more gentle and temperament, a little higher affinity, right? The inside is simply matched with a solid color backing or t-shirt, and the bottom is a pair of white suit pants. in order to increase the exquisite styling, like this blogger uses a colored scarf to tie on his bag, which attracts the eye without losing his taste.
As the weather turns cold, whether children can have a steaming lunch at school has become a matter of great concern to parents. On December 21, the Jimu News reporter learned from the Red scarf School in Jianghan District, Wuhan City that the school canteen was equipped with an insulated dining car for each class, the temperature of the meal was measured, the whole process of food delivery was kept warm, and the meal time was fixed to ensure that students had a “hot meal”.