On the solar radiation data calculation in the inclined plane

Solar radiation data after experiment equipment of solar energy utilization is a degree of basic information, it is the solar equipment

The important basis of thermal analysis. The various types of solar collectors are often at a particular location and water level in a Angle of tilt flat

Surface. So, get real solar radiation flux on the inclined plane data is the basis of analysis of solar energy equipment performance.

Inclined plane of the solar radiation data obtained, in addition to the application of part measurement instrument according to the same as the plane Angle is placed directly

Measurement, in most cases, we only can get to the level surface solar radiation data, the data applications

Placed on the surface of the collector, enabling to be reduced. Therefore, according to the radiation on the horizontal surface data to determine the inclined plane

In the solar radiation data calculation, analysis and experiment to sort out a basic calculation.

In the conversion of the calculation, the two have been made to cause the attention of people, one is to put the difficult conversion into the sun, the other - is measured

The amount of radiation data to have a good harmonic sex.

Common in some rough estimates of calculation for the standard is not for the sun conversion. Do not make this kind of conversion of best some time is ok. case

Such as, we just to f qualitatively compare the pros and cons of several kinds of equipment performance, or just in some of the local region, such as me

The eastern coastal areas of law of July and August in Shanghai or Beijing area of Lj. For the other occasions, the sun teaspoons of the push of poor

May be large, not for the sun transform or transform error may lead to incorrect conclusions.

Measure the solar radiation data of harmonic sex refers to the moment with the solar radiation data recorded the strict corresponding relation. When the harmonic to slightly

Qiang, sometimes without hurting the big picture, don't affect the final result. Factory in some occasions, however, is to harmonic sex is very demanding.

In practice as a towel, especially not automatically record the observation data of towels, often due to various reasons of female international harmonic cannot guarantee that don't

The situation is often happened. Use the incorrect data is likely to lead to unreasonable conclusion.

Some of this article is based on the work experience, discussed about these problems.

2 conversion coefficient calculation

Radiation from the sun come out radiation reaching the earth's surface, can be thought of as consists of two parts, part by solar radiation

Come out, don't change direction to reach the surface of the heat energy directly, known as the direct radiation; Another part of the radiation from the sun to come out, out

Scattering of the atmosphere of various substances or is due to the reflection of heat near the surface of other objects reach the surface of the heat energy, the can

Amount can be referred to as the diffuse radiation. Obviously, direct radiation and diffuse radiation to the direction of the heating surface is not the same, the former can root

According to the sun and heat on the surface of the relative relationship between calculated, while the latter has nothing to do with heating surface position. Due to a variety of

The weather conditions, the proportion of the two part of the radiation energy is uncertain, therefore, using the third know the level of radiation data conversion to a company

Placed on the surface of the heat, the conversion relation is more complex.

However, if we choose the appropriate place and proper inclination Angle, can not consider heating of the heat near the surface of the other object

The influence of reflection, on the basis of this, can further for the two special case analysis.

We have projected on the surface of the tilt radiation flux as HA, projected on the horizontal surface radiation flux of H, the ratio for them

If the projected onto the surface of the solar radiation energy mainly diffuse radiation, so, in what Fang Lun stone tube heated surface, it take

The radiation energy is the same. In this way, the level of radiation energy in the conversion of data at any place tilted surface radiation energy

Values, the scaling factor etc. 1. When the cloud or smoke, dust covered the sky or foggy weather evenly, can be thought of

This kind of situation. But that's not good weather for use of solar energy.

Another special case is mainly is the direct solar radiation to the earth's surface energy radiation, proportion of little diffuse radiation energy also

Mainly from near the surface of the sun, at this time, you can think all reach the surface of the heat of the sun radiation energy is a direct radiation. this

Sample, by the level of radiation flux conversion to any place the conversion coefficient of radiation flux on the surface of the tilt is just and the sun and the heat table

The relative position of the formation of the geometric angles. Sunny days of solar radiation that fit the situation.