Solar heating system using domed heat collector - includes double transparent dome and reflector mounted on insulating base, for rapid heating

Abstract

The solar heating system with heat collectors designed for rapid heating up, uses two transparent domes, one dome inside the other for each heat collector. Mounted at one side of the base of the heat collector is a vertical reflector so that further rays of the sun are reflected inside besides those passing directly through the two domes. The two domes are mounted on an insulation layer enclosed by the base sheet, and this layer has recesses holding the water circulating coils forming the heat exchanger. One design uses a cellular heat collector containing a product whose fusion point is between the temperature limits of the system, for a high heat exchange.

Description

The present invention relates to the installations of the solar collector with heat exchanger associated with an energy accumulator enabling hot water to be obtained.

In devices of this kind, the sensors have a poor performance due to the lack of concentration of the radiation and the inclination of the sun morning and evening; the calorific reserves are simple isolated tanks of hot water and in the case of heating it becomes quickly ineffective during periods of overcast sky.

The solar collector with two elliptical domes in glass or plexiglass allows a rapid rise in temperature of the heat exchanger by concentrating the radiation towards it; the concentration is improved by the reflection of the deflector towards the domes. This system improves the yield in duration (morning and evening) and in hourly quantity because Q = m C (s - e) (Q = quantity of calories captured, m = heated mass, C = calorific index of the heated product, #s = = exchanger outlet temperature and #e = inlet temperature).

The larger the difference "#s - #e", the larger Q is. Reflection losses are minimal due to the insulation and the double wall system (two domes).

This powerful assembly is associated with a cell accumulator making it possible to store a significant calorific energy by using the principle of the heat of "fusion-solidification" of a product whose point of change of state is included / understood in the interval of the temperatures. - res of use. The formula used is Q = m1 C1 (t - Pi) + m2 Cf (Q = quantity of calories stored, m1 = mass of the heated body, C1 = calorific index of m1, #t = terminal temperature of the set, #i = = initial temperature, m2 = mass of the product contained in the al # schools, Cf = heat of fusion of m2 for example 35000 calories / Kg of paraffin) .The use of paraffin allows a regulation higher than 50 degrees Celcius (520 C) which is a temperature usable for domestic hot water and central water heating. Depending on the geographic location and the use, the solar collectors can be coupled together with the cell accumulators.

The drawing for abstract number 1/2 is a figurative section of the solar collector with two "elliptical domes" and deflector. As shown, the solar collector comprises a support 1 in which a heat exchanger 2 rests on an insulator 3, the assembly being covered with two domes, an exterior 4 and an interior 5, made of glass or plexiglass; a deflector 6 reflects the sun's rays on the domes.

The drawing for abstract number 2/2 is a schematic section of the cell accumulator in the case of heating and domestic hot water. As shown, the accumulator comprises a body 1 in which supports 2 are installed which hold cells 3 filled with paraffin and a domestic hot water tank 7; a bottom 4 and a front 5 are fixed by bolts 9 on seals R.

The assembly which is insulated by "glass wool felt" 6 comprises a "safety-purge" system 10.

Among the most interesting applications one can cite the supply of hot water and central heating by fluid.

Claims

1. Solar collector (drawing 1/2) with two elliptical domes (4,5) concentrating Energy on a heat exchanger (2) and allowing the rapid rise of the temperature of the exchanger.

2. solar collector according to claim 1 characterized by the riise in place of a deflector (6) reflecting the solar radiation. Towards the domes.

3. solar collector according to claim 2 associated with a cell accumulator (drawing 2/2) conteaatt a product whose melting point is located in the range of temperature limits of use allowing a significant return of calories from solidification.