**Figure 2.**

*The necessary climatic conditions.*


#### **Figure 3.**

*Comparison between a fixed system with a 37<sup>o</sup> optimum angle and a tracking system.*

As observed from the column which gives average horizontal solar radiation per day, we have the sufficient radiation quantity in order to produce consuming requisite power of 0.55 kWh. By adjusting the system to an optimum bend degree, a significant radiation increase can be obtained. If a tracking system is used, a higher quantity with almost 40% can be obtained, as shown in **Figure 3**, where considered system losses are also considered.

In order for a PV system to obtain a standard power of 1 kW, eight-module Mitsubishi PV-MF 130 EA2LF type, polycrystalline silicon, 8 x 130Wp = 1.04 kW should be used.

For this system, we use 3 batteries of 130Ah, 12 V with 2 days functioning reserve even without the sun (**Figure 4** and **5**).

The calibration of the storage system is made based on the use period and the days when the system provides power from the batteries. The charging regulator for batteries has a basic function, that is, the charging stops when the batteries are completely charged.

There are some other functions such as consuming disconnection when the tension is small and temperature compensation [3–5].

Blockage diodes are used to avoid batteries discharge, on cells, during the night period or during cloudy days. For some systems, maximum power point trackers (MPPT) can be used.

The purpose of this device is to maintain the operating tension of the system to a maximum tension which is independent of the load resistance changes.

*Assessment of Solar Energy Potential Limits within Solids on Heating-Melting Interval DOI: http://dx.doi.org/10.5772/intechopen.104847*

**2.2 The determination of the geometric arrangement and the components of a solar furnace used for processing metallic and nonmetallic materials**

**Figure 4.** *Scheme of an electric system with PV for direct current.*

### **2.3 The analysis of heating process within solar furnaces**
