DE3123730A1 - Thermohydraulic regulation of the calories transmitted to a hot-water storage tank or a heat radiator by a furnace and similar - Google Patents

Description

DIPL. ING. HEINZ BARDEHLE Munich, <; 5. _{June 1981} PATENT ADVOCATE </

Reference number: My reference: ρ 3244

Registrant: Marino Prosperi Via Ebro, 9
20 141 Milan
Italy

"Thermohydraulic regulation of the on one Hot water tank or a heat radiator by an oven and similar calories transferred "

The use of usually of stoves, like Kamineaauid Heat scattered in hot water tanks and hot water jets requires the use of control and Regulating systems, thermostats, electrovalves and in general electromechanical ^ use.

The present invention enables an automatic see thermohydraulic control, as shown below will.

According to the invention, that of stoves, chimneys and the like will be used lost heat to a hot water tank or to a heater through a special hydraulic Circuit including a heat exchanger in contact with fire or smoke.

The hot water tank is located at the highest point of the system, whereas the heat exchanger is at the lowest point Point is arranged and their connection is realized by two pipelines that are as close as possible, one that leads the hot water to the hot water tank, hereinafter referred to as "hot pipeline" the other one that brings the water to be heated to the heat exchanger and that is called the "cold pipe" is specified.

The inlet pipe to the »heater is on the hot one Pipeline inserted at a significantly higher altitude than the upper level of the radiator, while the The outlet pipe is inserted into the cold pipe almost at the lower level of the radiator.

Three hydraulic branches are thus implemented: the The first contains the heat exchanger and is called the "exchange branch", the second contains the hot water storage tank and is called "memory branch" here, which contains the third the radiator and is called the "Ütrahlerzweig".

In such a system is suitably dimensioned water circulation is only in the circuit, consisting of the received ¹¹ Auatauschzweig "plus" fcJpeicherzweig "while

In the "radiator branch" the water tends to be at zero speed to bring and stay with it until a set temperature is reached, denoted by I. is referred to and the source of the performance level of the heat that is considered constant depends.

In other words, all taken from the heat exchanger Calories are transferred to the hot water tank until the temperature T in the container is reached

ΓΠ3-Χ

Once this temperature has been reached, the heat exchanger will stop to give the radiator all of the extracted heat, while in the "storage branch" the circulation will tend to cancel.

Of course, hot water will be withdrawn from the hot water tank and, as a result, the withdrawal of cold water from the expansion vessel, i.e. lowering the Temperature in the container, the previous conditions tend to do so to restore, i.e. to leave all taken calories to the hot water tank until the tem -

temperature T "is reached.
Max

Since it is possible to dimension the system in a medium-sized apartment so that the T has a suitable value (e.g. included between 60 C and 80 0) and that it has variations as the output varies (e.g. that it is suitable for a change in output of 25 # on Λ '$ θύ of the reference value T with 15 ° G, ^{varied from 70 ° G to 85 0} G), the system behaves as if it were provided with an effective regulation, as it is with ordinary thermostats, electrovalves, etc. would have.

The features and purposes of the invention will be made even clearer by the following with schematic illustrations provided implementation examples appear.

Fig.1 Composition of the system on two floors Fig.2 Scheme of the system

The oven 10 (charcoal type) is

provided with a smoke channel 11 on which the Wärmeaus exchanger 12 is appropriate «,

The latter is with the hot water tank 13 by the Hot water pipe, i.e. with the "hot pipeline" l '^ Shd of the .pipe of cold water i.e. «' connected to the "cold pipe" 15.

The expansion tank 16 feeds the hot water storage tank through the pipe iy that fits in the low l'eil this hot water tank, whereas from the upper ¹ J eil thereof the pipe 18 for the tapping of hot water for various household uses emanates.

The radiator 21 is through the pipe 19 with the Pipeline 14- at point 22 and through the pipeline 20 ver with the pipeline 15 at the point 23 connected.

tu: lowest altitude of the heat exchanger and; Insertion of the cold pipeline

ho: highest altitude of the heat exchanger and insertion of the hot pipeline h ^ ,: altitude of the pouring of the hot water into the

Hot water tank
h (-: Height of the outlet opening of the cold pipe

from the hot water tank
hrp-. Inlet opening of the "hot pipeline into the

Spotlights
Iu: Insertion position of the "radiator branch" on the

¹¹ hot pipeline "
hg: Insertion position of the "radiator branch" on the "cold pipe".

Referring to Fig. 2, there are three branches of the circulation

formed, all of which are dominated by positions 22 and 25 are i.e .:

- "Exchange branch" denoted by a

- "Storage branch" denoted by b

- "Emitter branch" denoted by c

The derivative ^ f Δ ρ (hJ, i.e. the derivative in relation to nis to the quota h of the pressure deviation ρ between the ascending branch of the "hot pipeline" + heat exchanger and the descending branch of the "cold! catenary" + radiator to a general quota h He can suffer very strong variations and character changes. In fact, it is the difference between you depending on the density deviation between two branches 'i' er minus, which has limited variations, and the hydraulic resistance, which, however, largely changes can suffer.

Since Δ ρ (h / | J = (\ -p (h ^) = O, it follows from this that for some values of h, such as h ^ C h <h ^, Δρ (h) = O could still be obtained That is, it could happen that if the two branches 14 and 15 are connected to a suitable ratio h, there is no water circulation in the connecting line.

If the connection between the two branches 14 and 15 is made at significantly different odds, it could it happens that, given the possible span of the hydraulic resistances ^ p between the verbun those Points is the same as that corresponds to the weight of the liquid column of the connecting branch; i.e. it could be a state of equilibrium for the system in the embodiment as shown in Fig. 2 are sufficient, in which the circulation in the emitter branch is equal to zero.

If you are in the latter state and with the water at a cold temperature (e.g. at a temperature that is close to the ambient temperature jnalien temperature is this state of equilibrium stable.

That is, gradually as the water heats up, the pressure at the ends of the "Gtrahlerzweige" increases, so that cold water moves out of the pipe 19 and warm water coming from the contact line ΉΙ- is poured in, whereby Ge ¹ The weight of the "otrahlerzweiges" is reduced until the pressure deviation that caused the shift is compensated and a state of equilibrium is reached in which only the level of E, which is the limit separating the warm from the cold water, is changed in the branch 19 is.

When the falling E reaches the limit h ^, the begins Water circulation in the "Litrahlerzweig", while in the " cherzweig "the water is motionless.

This means that when the temperature T (for E = hrp) has been reached in the hot water storage tank, the system switches over to transferring the entire tub removed from the "heat exchanger" to the heater.

It is obvious that if the temperature in the hot water tank drops, for example because of the tapping of warm water, the system returns to give off the 'heat to this hot water tank.

From the foregoing it appears clear that the one described System, although it has no thermomechanical organs such as thermostats and the like, like a perfect, absolutely reliable thermostatic system behaves with fully automatic operation.

Since the applications of the invention as a directional and non-limiting examples have been described, it is tacitly understood that 'every equivalent term Application of the cited terms of the invention and each carried out according to the features of the invention u / o functioning product is included in its protected area.

Claims (1)

Claims o System for the automatic thermohydraulic regulation of a system in which the recovered calories of a heat generator CiO), such as stoves, chimneys and the like, are transferred through a heat exchanger [12) to a hot water storage tank (13) and to a radiator, characterized in that The inlet pipe (19) of the heater "(21) is inserted into the pipe C14) of the lice water, which connects the heat exchanger 02) with the hot water storage tank CijJ on a significantly higher level than that of the heater £ .21), whereas the outlet pipe dos The radiator is inserted into the pipeline H53 of the cold water, which pipeline connects the hot water tank £ i3) with the heat exchanger (12) almost at the level of the outlet opening of the radiator (21 *), with the effect of an automatic thermo-hydraulic regulation, which essentially is equivalent to or higher than that achieved with the known electromechanical thermostat devices and similar - we rden can be used when determining the transfer of the heat extracted from the heat exchanger to the hot water tank or to the heater depending on the water temperature in the hot water tank.