JPH01285607A - Hybrid binary generating system - Google Patents

Abstract

PURPOSE:To enable ensurance of a high heat paragraph and to enable the increase of an output by a method wherein a working fluid preheater is mounted to each of a plurality of unit generating devices which is adapted to circulate working fluid within a working fluid loop and drive a generator by means of a steam prime mover situated in the pool. CONSTITUTION:Each unit generating device forms a working fluid loop mechanism in which vaporizers E1 and E2, steam prime movers T1 and T2, condensers C1 and C2, and pumps P1 and P2 are interconnected in series for closing. Working fluid in a liquid phase, e.g. fleon, is vaporized in a way to derive heat from heat source fluid by means of the vaporizers E1 and E2. The generated high temperature and high pressure fleon steam is fed to steam prime movers T1 and T2 to drive generators G1 and G2. In a so formed device, each unit generating device is provided with preheaters H1 and H2 to preheat fleon are mounted on the upper stream side of the vaporizers E1 and E2. After heat source fluid is caused to flow first to the vaporizers E1 and E2, it is forced to flow to the preheaters H1 and H2. In this case, the vaporizers E1 and E2 and the preheaters H1 and H2 are interconnected in series, and a heat source is used commonly.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention operates based on the Rankine cycle using a working fluid such as fluorocarbons and using warm wastewater discharged from factories, plants, etc., geothermal water, etc. as a heat source. Concerning improvements in binary power generation systems.

[Conventional technology]

As an example of this type of binary power generation system,
What is described in Publication No. 0-144594 is
As shown in the figure, evaporation S (E), steam motor (T)
, a condenser (C), and a pump (P) are connected in series to form a closed working fluid loop, and fluorocarbon is circulated as a working fluid within this working fluid loop. Then, the liquid phase Freon absorbs heat from the heat source fluid and evaporates in the evaporator (E), and the generated high temperature and high pressure Freon vapor is supplied to the steam motor (T), which drives the power generation K (G). used for. After completing its work, the low-temperature, low-pressure Freon vapor is discharged from the steam engine (T) and sent to the condenser (T).
Proceed to step C), where the cooling water is heated and condensed. The fluorocarbons that have condensed into a liquid phase are sent to the evaporator (P) again by the pump (P).
E).

[Problem to be solved by the invention]

The output of the binary power generation system is given by: However, η is a coefficient determined by the working fluid (in this case, Freon). From the above equation, it can be seen that by increasing (evaporation temperature - condensation temperature), that is, the heat drop, the output increases.

The object of the invention is therefore to provide a binary power generation system in which the heat drop can be made as large as possible to increase the power output.

[Means to solve the problem]

As shown in Fig. 1, this invention hybridizes a binary power generation system and combines a plurality of unit power generation devices (+!l 1 ) (nu 2) - hereinafter omitted - connected in series to a heat source. At the same time, a preheater (
H) was provided to preheat the working fluid supplied to the evaporator prior to heating in the evaporator. At that time, Pre-B
As the heat source for B(H), the heat source for the evaporator (E) is shared. That is, the heating fluid is first passed through the evaporator (El) of the first unit power generator (Hermitage 1), and then passed through the evaporator (E2) of the second unit power generator (Magnetic 2). The water is supplied to the evaporators of all unit power generation devices in series, and then the preheater (H
Starting from 1), it is sequentially passed in series to the preheaters of all unit power generators.

[Effect]

The function of the evaporator in the binary power generation system is to evaporate the liquid-phase working fluid by removing latent heat of evaporation from the heat source fluid, thereby generating high-temperature, high-pressure working fluid vapor. As described above, the higher the evaporation temperature of the working fluid vapor, the greater the heat drop and the greater the output. Therefore, the preheater (H) increases the evaporation temperature of the working fluid supplied to the evaporator (E) by preheating it prior to heating in the evaporator (E). In other words, as can be seen from the diagram shown in FIG.
By adding H), the evaporator outlet temperature of the heat source fluid increases from tsz to tsz' as shown in Figure 2, so the evaporation temperature of the working fluid must be correspondingly increased from Lm2 to t+H'. I can do it.

In addition, by hybridizing, the thermal drop can be reduced to a third level.
It can be made larger than the conventional type shown in the figure, increasing output.

Furthermore, in order to share the heat source fluid between the evaporator and preheater, all unit power generators (case 1) (case 2)...
・Sequentially flow in series to the evaporators (Ex) (Et)...
After that, all unit power generators (Magnetic 1) (Nu2)...
Since the heat is caused to flow sequentially in series to the preheater (H+) (Hz)..., an even larger heat drop can be secured. For comparison, FIG. 1A shows the heat source fluid in the first evaporator (El), the first preheater (Hl), and the second evaporator (
E2), the second preheater (Hz) is shown as an example. Therefore, the amount of heat of each heat exchanger is ΔT20
℃, the temperature conditions are as shown by the numerical values appended to the figure, and the design conditions are evaporation temperatures of 97° C. and 57° C., respectively. On the other hand, according to the present invention, the temperature conditions are as shown by the numerical values appended to FIG. 1, and the evaporation temperature in the second unit power generator (Arashi 2) is 77°C.

This is 20° C. higher than the case shown in FIG. 18, and therefore, as can be seen from the above equation, an increase in output is achieved.

〔Effect of the invention〕

As explained above, this invention provides an evaporator, a steam engine,
A hybrid binary system that circulates working fluid in a working fluid loop in which a condenser and pump are connected in series, has multiple unit power generators that drive a generator using a steam motor, and shares the heat source that supplies the evaporator. - In a power generation system, each unit power generator is provided with a preheater for preheating the working fluid before being supplied to the evaporator, and the heat source fluid is first passed in series to the evaporator of all unit power generators, and then all Since the heat is passed in series to the preheater of the unit power generator, it is possible to secure a larger heat drop than before and increase the output.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a hybrid binary generator system according to the present invention, Fig. 1A is a block diagram similar to Fig. 1 showing a comparative example, and Fig. 2 shows fluid flow in an evaporator equipped with a preheater. FIG. 3 is a block diagram illustrating a conventional binary power generation system. FIG. 4 is a diagram showing temperature changes of fluid in an evaporator without a preheater. Es El -, E2: Evaporator H, H1, 82: Preheater T% TI% T2: Steam motor G, cl, G2
: Generator C% CI SC2: Condenser P, Pl, p= : Pump floor 1: First unit power generator 2: Second unit power generator

Claims (1)

[Claims] (1) It has a plurality of unit power generating devices in which a working fluid is circulated in a working fluid loop in which an evaporator, a steam motor, a condenser, and a pump are connected in series, and the steam motor drives a generator. In a hybrid binary power generation system that shares a heat source that is supplied to the unit power generators, each unit power generator is equipped with a preheater for preheating the working fluid before being supplied to the evaporator, and the heat source fluid is first evaporated in all unit power generators. Pour into a bowl;
A hybrid binary power generation system characterized in that the flow is then made to flow to the preheater of all unit power generation devices.