A SCM may be made as a single-piece parabolic mirror or assembled with a number of smaller mirrors in parallel rows. The theoretical maximum is better achieved with more elaborate concentrators based on primary-secondary designs using nonimaging optics   which may nearly double the concentration of conventional parabolic troughs  and are used to improve practical designs such as those with fixed receivers.
The profile of the solar energy flux is calculated by the SRT method, and the effects of the key operating parameters on the performances of the receiver are numerically investigated. Enclosed Analysis of parabolic trough collector edit ] Inside an enclosed trough system The enclosed trough architecture encapsulates the solar thermal system within a greenhouse-like glasshouse.
It should be noted that the distribution for half of the receiver is shown in Figure 3. Shuman then constructed a full-scale steam engine powered by low-pressure water, enabling him to patent the entire solar engine system by The daily motion of the sun across the sky also introduces errors, greatest at the sunrise and sunset and smallest at noon.
During abnormal operation of a PTC, some of the rays reflected Analysis of parabolic trough collector near the end of the concentrator opposite the sun cannot reach the receiver. In addition, V-type parabolic troughs exist which are made from 2 mirrors and placed at an angle towards each other.
It also is much easier to move and install. We have proved the commercial profit of sun power in the tropics and have more particularly proved that after our stores of oil and coal are exhausted the human race can receive unlimited power from the rays of the sun.
Ackermann and British physicist Sir Charles Vernon Boys ,[ citation needed ] developed an improved system using mirrors to reflect solar energy upon collector boxes, increasing heating capacity to the extent that water could now be used instead of ether.
He, along with his technical advisor A. The thermocline tank approach uses a mixture of silica sand and quartzite rock to displace a significant portion of the volume in the tank. The amount of aperture area lost is shown in Figure 3. Therefore, to find the total loss in aperture area, Ab the two areas, Ae and Ab, are added together without including the term tan 0 Jeter, This is defined as the ratio of the energy intercepted by the receiver to the energy reflected by the focusing device, i.
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The geometry of the collector dictates the geometric factor, Af, which is a measure of the effective reduction of the aperture area due to abnormal incidence effects, including blockages, shadows, and loss of radiation reflected from the mirror beyond the end of the receiver.
In equation form Sodha et al. In Shuman formed the Sun Power Company with the intent of building larger solar power plants.
Such damage may occur due to being hit by an object during bad weather. The promising results will provide a fundamental reference for the development of the parabolic trough solar thermal power plant in China.
The thermal stress and the deformations of the absorber are higher than that of the glass cover. This is called the end effect. It should be noted that the term tan 0 shown in Eqs. When the inlet velocity is in a range of 1.
As can be seen from these figures, the top part of the receiver essentially receives only direct sunshine from the sun and the maximum concentration, about 36 suns, occurs at 0 incidence angle and at an angle P, shown in Figure 3. The optical efficiency depends on the optical properties of the materials involved, the geometry of the collector, and the various imperfections arising from the construction of the collector.Design analysis of solar parabolic trough thermal collectors.
() Used a thermal model for analysis of parabolic trough collector receiver. The model was validated using known performance. Design and Analysis for 1MWe Parabolic Trough Solar Collector plant based on DSG method.
Arvind Kumar Prof. (Dr). Satish Chand Mr. O.P. Umrao. Thermal performance of parabolic trough collector was predicted on the basis of simulated results using C program for the system, operating and physical parameters and properties employed like a T K.
Parabolic trough collector is the most proven technology used for generating power and also for many other purposes. The purpose of this paper is to conduct an.
A parabolic trough is a type of solar thermal collector that is straight in one dimension and curved as a parabola in the other two, lined with a polished metal mirror. The sunlight which enters the mirror parallel to its plane of symmetry is focused along the focal line, where objects are positioned that are intended to be heated.
For example. The parabolic trough linear receiver, which can also be called as the HCE, is a key component in a parabolic trough collector system.
Presently, the key issues on improving the performances of the HCE have obtained wide attention, and thus numerous studies have been implemented.Download