Recommended formula for calculating effective sunshine time in severe cold weather?
Maybe everyone is unfamiliar with the concept of effective sunshine time. In fact, it is a standard established according to relevant regulations. It refers to the time when the external window of a building gets sufficient sunshine on the specified sunshine standard day, such as the effective sunshine time range in cold days, which is determined according to the climate zone where the building is located, the size of the city and the nature of the building. According to the relevant national standards, the residence should meet the requirement that the effective sunshine of the sheltered living room should not be less than two hours in cold weather. So when buying a house, people will pay attention to this option. If it doesn't meet the requirements, it needs careful consideration.
Recommendation of related calculation formulas
Let's recommend a calculation formula: let the direct latitude of the sun on that day be A (the south latitude A takes a negative value) and the local geographical latitude be B, then there will be: sunshine time per day =24 hours * (1-arccos (TGA * TGB)/180). However, if you want more accurate results, you need to consider complex factors such as weather refraction and weather, which are generally ignored in the calculation. With this method, in fact, as long as you know the latitude and longitude of the earth, you can also calculate it, which is more practical.
What ancient poems are there in this solar term?
65438+ Look at the world and drive the poets out. Cook a meal when you are full, and change the paper into clothes when you are cold. My pity for poetry is a family matter, and my mind is very subtle.
2. Xia Weisen's "Feeling of Early Cold Days": A few guests have sex and rain, and the pine and cypress are evergreen and proud. The north window lies high, away from the customs, and it is difficult to travel in the turbid world. In front of the court, the bamboo horse is childlike, and the spring breeze is generous and generous. In a few days, plum blossom will win, and red Cui Zuo will be served.
3. Li Guang's "Cold Evening Showing Neighbors": Frozen clouds hang down to the north wind, and rivers and lakes want snow. I'm wearing a bamboo hat, so I'm glad to go fishing with you.
4. Autumn Night Feelings by York: It's never easy to tell how small it is, although the talker feels more and he wants more. A small gap, we must guard against the nest, there is no need to cry because of the cold. Nothing can be done without constraints, and the machine has already broken down. I was exiled by a wise ruler who had touched Tianwei because of a momentary mistake.
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