JPS59221409A - Thermal energy recovery device in engine - Google Patents

Abstract

PURPOSE:To contrive reuse of the titled energy as power of an engine, by recovering thermal energy radiated through a radiator and thermal energy possessed by combustion gas to be discharged into the air, in a water cooled engine of a motor car. CONSTITUTION:High temperature water sent into a heat exchanger is heated by exhaust gas passing through a high temperature fluid pipe 7 and turned into high temperature and high pressure aqueous steam, in a recovery device of thermal energy. After a steam turbine 12 is turned by the steam led by a high pressure steam pipe 11, the steam is led to a condenser 14 through a low pressure steam pipe 13, condensed, led to a condenser pipe 15, returned to a water jacket 4 and circulated by cooling an engine 1. Turning force of the steam turbine 12 is transmitted to an output shaft 2 and a generator 21 of the engine 1 through gears 16, 18, hydraulic coupling 17 and gears 19, 20, 22.

Description

[Detailed Description of the Invention] In water-cooled engines such as automobiles, the thermal energy held by high-temperature water that cools the engine is radiated into the atmosphere in a radiator, and the thermal energy held by hot combustion gas is radiated into the atmosphere. The thermal efficiency of Engis is less than 50% because it is released into the atmosphere together with the exhaust gas.

The present invention relates to a device that recovers the thermal energy that is wasted as described above and reuses it as power for an engine, etc., and will be described below with reference to the accompanying drawings.

(1) is a water-cooled automobile engine, (2) is its output shaft, (3) is a fan that rotates by the engine (1),
(4) is a water jacket that cools the engine ('1), and (5) is an exhaust pipe of the engine (1).

High-temperature exhaust gas passes through the high-temperature fluid pipes (7) of the plate-type heat exchanger (6) installed at key points of the exhaust pipe (5), and the inlet of the low-temperature fluid pipe (8) is connected to the hot water pipe ( 9) is connected to the outlet of the water jacket (4), and the circulating water that has cooled the engine (1) passes through the circulation pump OQ provided in the middle of the hot water pipe (9).

The outlet of the cryogenic fluid pipe (8) has a high pressure steam pipe αυ,
It is connected to the inlet of the steam turbine α power, and its outlet is connected with a low pressure steam pipe a31 to the upper tank (14a) of the corrugated fin type condenser α installed just before the fan (3), The lower tank (14b) is connected to the inlet of the water jacket l-(4) with a condensate pipe αQ.

The gear (lfi is fitted to the turbine shaft (i2a) of the steam turbine 0) meshes with the gear 0 fitted to the input shaft (17a) of the fluid joint 07, and the output shaft (17
The gear θ9 fitted in b) is connected to the output shaft (
2) The gear (20) fitted with K meshes with the gear (c) fitted on the drive shaft (zta) of the generator (21).

In the above-mentioned device, high-temperature water is pumped from the water jacket (4) to the heat exchanger (6) by the circulation pump 00), and the high-temperature water is pumped into the heat exchanger (6) by the exhaust gas passing through the high-temperature fluid pipe (7). It is heated and becomes high-temperature, high-pressure water vapor.

This water vapor is guided by the high pressure steam pipe 0υ, and after rotating the steam turbine (121), is led to the condenser θ (a) by the low pressure steam pipe 03, where it condenses, and the condensate pipe (
Guided by one, return to the water jacket (4) D.
Cool and circulate the engine (1).

The rotational force of the steam turbine H is transmitted to the output shaft (2) of the engine (1) and the engine (21+) via the gear θω (1), the fluid coupling Q71, and the gear II (20) (2a).

As mentioned above, the device of the present invention recovers the thermal energy wasted in the conventional engine (1, 1) as rotational energy in the steam turbine (I2), and uses this for motive power or power generation. Thermal efficiency is significantly improved and fuel can be saved.

However, in the device of the present invention, since the circulation pump H) is provided between the water jacket (4) and the heat exchanger (6), the water vapor and high temperature water generated in the heat exchanger (6) are It will not flow back into the water jacket (4) and cause the engine (1+) to overheat.

[Brief explanation of drawings]

The drawing is a schematic configuration diagram of an engine equipped with the device of the present invention. (1) Engine (2) Output shaft (3) Fan
(4) Water jacket (5) Exhaust pipe
(6) Heat exchanger (7) High temperature fluid pipe (
8) Low temperature fluid pipe (9) High temperature water pipe OQ circulation pump αD high pressure steam pipe 02 steam turbine (i2a)
Turbine shaft 031 Low pressure steam pipe θa condenser
(14a) Upper tank (+4b) Lower tank
09 Condensate pipe α6) Gear aη Fluid joint (1
7a) Input @ (17b) Output shaft

Claims (1)

[Claims] A heat exchanger that uses engine exhaust gas to vaporize high-temperature water that cooled the engine using a circulation pump installed on the outlet side of the engine cooling water jacket, a steam turbine, and a steam turbine rotated by the engine. A thermal energy recovery device for an engine, in which rotational energy obtained in a steam turbine is utilized by circulating the condenser through forced ventilation by a fan, and the water jacket, in that order.