nhật xạ kế
Definition
- Noun:
- Pyranometer: A scientific instrument used to measure solar radiation flux density (the power of solar radiation per unit area) on a planar surface. It is commonly used in meteorology, climatology, and solar energy studies.
- Actinometer: A general term for an instrument that measures the intensity of radiant energy, particularly from the sun. In modern usage, it is often synonymous with a pyranometer for measuring broadband solar irradiance.
Usage Examples
- Noun:
- Nhật xạ kế là thiết bị quan trọng trong trạm khí tượng. (The pyranometer is an important device in a weather station.)
- Các nhà khoa học sử dụng nhật xạ kế để đo cường độ bức xạ mặt trời. (Scientists use an actinometer to measure solar radiation intensity.)
- Dữ liệu từ nhật xạ kế giúp đánh giá tiềm năng năng lượng mặt trời của khu vực. (Data from the pyranometer helps assess the solar energy potential of the area.)
Advanced Usage
- "Nhật xạ kế bóng cầu" (Spherical pyranometer / Sunshine ball): A specific type of pyranometer, often referring to a Campbell-Stokes sunshine recorder, which uses a glass sphere to focus the sun's rays to burn a trace on a card, measuring sunshine duration.
- Nhật xạ kế bóng cầu ghi lại số giờ nắng trong ngày. (The spherical pyranometer records the number of sunshine hours in a day.)
Variants and Related Words
- Máy đo bức xạ mặt trời: A more descriptive Vietnamese term meaning "solar radiation measuring device," often used interchangeably with .
- Hỏa nhật kế: An older or less common term, also meaning pyranometer or actinometer.
Synonyms
- Solarimeter: Another term for an instrument measuring solar radiation, essentially synonymous with pyranometer.
- Sunshine recorder: A type of instrument for measuring the duration of bright sunshine, which is a specific category of solar radiation measurement.
Related Scientific Concepts
- Bức xạ mặt trời (Solar radiation): The electromagnetic radiation emitted by the sun, which is what a measures.
- Cường độ bức xạ (Irradiance): The power of electromagnetic radiation per unit area, typically measured in watts per square meter (W/m²), which is the primary output of a pyranometer.