Question

Зимой в неотапливаемом помещении, окна которого выходят на юг, довольно тепло. Когда такое может быть? почему?

Answer 1

Такое может быть в яркий солнечный день так как воздух в помещении будет нагреваться за счет излучения ( в начале нагреваются предметы в комнате а потом от предметов за счет конвекции нагреется и воздух)

Answer 2

Possible Explanation for Warmth in an Unheated Room with South-Facing Windows in Winter

It is possible for a room with south-facing windows in an unheated building to be relatively warm during winter. This can occur due to several factors:

1. Solar Heat Gain: South-facing windows receive more direct sunlight during the day, especially in the northern hemisphere. This exposure to sunlight can result in solar heat gain, where the windows absorb and transmit heat into the room. The heat from the sun can warm up the air inside the room, making it feel relatively warm compared to the outside temperature.

2. Insulation: The room may have good insulation, which helps to retain heat. Insulation materials, such as insulation foam or double-glazed windows, can reduce heat transfer between the inside and outside of the room. This means that even though the room is not actively heated, the insulation helps to trap the heat generated by solar gain and prevents it from escaping, keeping the room relatively warm.

3. Thermal Mass: The room may have thermal mass materials, such as concrete or brick walls, which can absorb and store heat. These materials have the ability to retain heat and release it slowly over time, helping to maintain a relatively warm temperature in the room even when the outside temperature drops.

4. Geographical Location: The geographical location of the building can also play a role. For example, if the building is located in a region with a mild winter climate or a region that receives a significant amount of sunlight during winter, it is more likely for the room to be relatively warm even without active heating.

It is important to note that while the room may feel warm compared to the outside temperature, it may not reach the same level of warmth as a heated room. The warmth in an unheated room with south-facing windows is typically a result of passive heating from sunlight and other factors mentioned above, rather than active heating systems.

Please keep in mind that the specific conditions and characteristics of the room, such as the size of the windows, the insulation quality, and the materials used in construction, can also affect the level of warmth experienced in the room.