Waste heat recovery device of generator set

Abstract

The utility model provides a generator set waste heat recovery device which comprises a set mute machine box, the mute machine box is divided into a working bin and an air outlet bin, and the working bin comprises a generator, an internal combustion engine, a water tank fan, a fixed air inlet ventilation opening, an air inlet control electric shutter, an air guide channel, a drainage fan, a shutter controller and a temperature sensor. The air outlet bin comprises an exhaust control electric shutter; when the temperature sensor measures that the unit runs at the temperature higher than-30 DEG C, the shutter controller controls the shutter to be completely opened, the drainage fan is closed, and waste heat generated when the internal combustion engine works is transferred to the air outlet bin through the water tank fan and then is exhausted out of the system through the exhaust shutter. When the temperature sensor measures that the unit runs in the state of being lower than-30 DEG C, the shutter controller controls the shutter to be closed according to the current temperature, and meanwhile the drainage fan is started. Hot air in the air outlet bin can return to the working bin through the air guide channel, waste heat recovery is achieved, and therefore the working efficiency of the unit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel and gas generator sets and gas generator sets, in particular to a waste heat recovery device for a generator set. Background Art

[0002] The water tank fan of a traditional generator set is generally connected to the internal combustion engine through a pulley, and the fan will start running immediately after the system is started. When the generator set is working in an environment below -30℃, the heat energy generated by the internal combustion engine will be carried away by the flowing cold air after being transferred to the surface due to the air cooling effect, which makes the internal combustion engine take a longer time to reach the optimal working temperature. In addition, when the internal combustion engine is running in a low temperature environment, its lubricating oil viscosity is high and the lubrication effect is low, which is easy to accelerate the wear of the machine and increase the mechanical energy loss. Therefore, there is a need to recover the waste heat of the unit and increase the temperature of the working chamber. At present, there are usually two forms of waste heat recovery of the unit. One is to recover the waste heat by recovering the hot air from the exhaust pipe. This method requires secondary treatment of the exhaust gas after combustion, which is easy to affect the exhaust back pressure. The oxygen content of the air after combustion is lower than that of natural air, and it is not suitable to enter the working chamber for secondary circulation to avoid affecting the efficiency of the internal combustion engine. Another waste heat recovery method is to adjust the cooling water circuit of the internal combustion engine so that it passes through the area where the heat source is needed for heat exchange to achieve the purpose of waste heat recovery. In this method, the heat energy carrier is liquid, the design of the recovery device is relatively complex, and the original cooling water circuit needs to be adjusted. Neither of these two solutions has a good cost-effectiveness in meeting the insulation requirements of generator sets when working in extremely cold areas. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a waste heat recovery device for a generator set, which increases the operating temperature of the cabin by circulating and recovering the heat flow generated by the generator set cabin and thus optimizes the working efficiency of the unit. It has a simple structure, is easy to implement, and does not affect the operation of the unit at normal temperature.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a waste heat recovery device for a generator set, comprising a generator set and a silent chassis, the silent chassis is divided into a working compartment and an air outlet compartment; the working compartment comprises a generator, an internal combustion engine, a water tank fan, a fixed air intake vent, an air intake control electric shutter, an air guide duct, a drainage fan, a shutter controller and a temperature sensor; the air outlet compartment comprises an exhaust control electric shutter; the shutter controller is connected to the air intake control electric shutter and the exhaust control electric shutter;

[0005] When the temperature sensor measures that the unit is operating at a temperature above -30°C, the shutter controller controls the intake control electric shutters and the exhaust control electric shutters to be fully opened, and the drainage fan is turned off. The waste heat generated by the internal combustion engine when it is working is transferred to the air outlet bin through the water tank fan, and then discharged to the outside of the system through the exhaust control electric shutters; when the temperature sensor measures that the unit is operating at a temperature below -30°C, the shutter controller controls the intake control electric shutters and the exhaust control electric shutters to be closed according to the current temperature, and turns on the drainage fan at the same time. At this time, the heat energy generated by the internal combustion engine when it is working is transferred to the air outlet bin through the water tank, and the negative pressure generated by the operation of the drainage fan, the hot air flow from the air outlet bin will return to the working bin through the air duct, thereby realizing waste heat recovery.

[0006] In a preferred embodiment: the exhaust control electric shutter controls the waste heat recovery airflow by controlling the closing angle through a shutter controller, the air duct is used to guide the airflow back to the working chamber for circulation, and the drainage fan is used to increase the waste heat airflow recovery amount and quickly mix the airflow entering the working chamber to make the working chamber temperature evenly distributed.

[0007] In a preferred embodiment: the air duct is arranged below the waste heat recovery device of the generator set so that the hot air flow rises and mixes with the cold air.

[0008] In a preferred embodiment: the air intake control electric shutter controls the natural air intake amount by closing the shutter controller, and the exhaust control electric shutter controls the waste heat recovery air flow by closing the shutter controller.

[0009] In a preferred embodiment: the air outlet direction of the drainage fan is vertical and away from the water tank cooling fan.

[0010] In a preferred embodiment, the temperature sensors should be arranged at the top and bottom of the internal combustion engine.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the operating temperature of the cabin is increased by recycling the heat flow generated by the generator cabin, thereby optimizing the working efficiency of the unit; the structure is simple, easy to implement, and does not affect the operation of the unit at normal temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a working schematic diagram of a waste heat recovery system of a preferred embodiment of the utility model;

[0013] Figure 2 It is a structural layout diagram of the waste heat recovery system of the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0016] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0017] A waste heat recovery device for a generator set, reference Figure 1-2 , including a silent chassis 01 of the unit, wherein the silent chassis 01 is divided into a working compartment 11 and an air outlet compartment 12, the working compartment contains a generator 21, an internal combustion engine 22, a water tank fan 23, a fixed air intake vent 24, an air intake control electric shutter 25, an air duct 26, a drainage fan 27, a shutter controller 28, and a temperature sensor 29; the air outlet compartment 12 contains an exhaust control electric shutter 2A; when the temperature sensor 29 measures that the unit temperature is above -30°C, the shutter controller 28 controls the shutter 25 and the shutter 2A to be fully opened, and the drainage fan 27 is closed, and the waste heat generated by the internal combustion engine 22 during operation is transferred to the air outlet compartment 12 through the water tank fan 23, and then discharged to the outside of the system through the shutter 2A. When the temperature sensor 29 measures that the unit temperature is below -30°C, the shutter controller 28 controls the shutter 25 and the shutter 2A to be closed according to the current temperature, and the drainage fan 27 is turned on at the same time. At this time, the heat energy generated by the internal combustion engine 22 when working is transferred to the air outlet bin 12 through the water tank 23. Due to the negative pressure generated by the operation of the induced draft fan 23, the hot air flow in the air outlet bin will return to the working bin 11 through the air duct 26, realizing waste heat recovery, thereby improving the working efficiency of the unit.

[0018] Specifically, the fixed air intake vent 24 is used to provide the minimum air required to participate in combustion when the internal combustion engine 22 is working without being affected by the opening and closing of the shutter 25. The size of the fixed air intake vent 24 is calculated according to the amount of air required for the internal combustion engine 22 to work. The fixed air intake vent 24 is farther from the water tank fan 23 relative to the air outlet of the drainage fan 27 so that the cold air can be fully mixed with the recovered hot air flow after entering the working chamber 11.

[0019] Specifically, the row of shutters 2A can control the amount of waste heat recovery airflow by closing the angle, the air duct 26 is used to guide the airflow back to the working chamber 11 for circulation, and the drainage fan 27 is used to increase the amount of waste heat airflow recovery and quickly mix the airflow entering the working chamber 11 to make the temperature of the working chamber 11 evenly distributed.

[0020] Furthermore, the air duct 26 plays a role in drainage, and the installation position and shape can be adjusted according to actual needs. Preferably, the air duct outlet is arranged below the cabin 11 so that the hot air flow rises and mixes with the cold air.

[0021] Specifically, the intake control shutter 25 can be closed at an angle to control the natural air intake through the shutter controller 28, and the exhaust control shutter 2A can be closed at an angle to control the waste heat recovery airflow through the shutter controller 28, and the cabin target temperature control can be achieved in conjunction with the temperature sensor in the cabin, so that the cabin can operate within a specific temperature range. Furthermore, the shutter controller 28 refers to a functional component that controls the shutter closing amount, and it can also be a generator set controller with the same function.

[0022] Preferably, the air outlet direction of the induced draft fan 26 is vertical and away from the water tank cooling fan 23, so that the cold air can be fully mixed with the recovered hot air flow after entering the cabin.

[0023] Preferably, the temperature sensor 29 is arranged at the top and bottom of the internal combustion engine, and the shutters 25 and the shutters 2A are adjusted by monitoring the ambient temperature of the internal combustion engine 22 to prevent the abnormal temperature of the internal combustion engine 22 from causing unit failure.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A waste heat recovery device for a generator set, characterized in that: It includes a unit and a silent chassis, and the silent chassis is divided into a working compartment and an air outlet compartment; the working compartment includes a generator, an internal combustion engine, a water tank fan, a fixed air intake vent, an air intake control electric shutter, an air guide duct, a drainage fan, a shutter controller and a temperature sensor; the air outlet compartment includes an exhaust control electric shutter; the shutter controller is connected to the air intake control electric shutter and the exhaust control electric shutter; When the temperature sensor measures that the unit is operating at a temperature above -30°C, the shutter controller controls the intake control electric shutters and the exhaust control electric shutters to be fully opened, and the drainage fan is turned off. The waste heat generated by the internal combustion engine when it is working is transferred to the air outlet bin through the water tank fan, and then discharged to the outside of the system through the exhaust control electric shutters; when the temperature sensor measures that the unit is operating at a temperature below -30°C, the shutter controller controls the intake control electric shutters and the exhaust control electric shutters to be closed according to the current temperature, and turns on the drainage fan at the same time. At this time, the heat energy generated by the internal combustion engine when it is working is transferred to the air outlet bin through the water tank, and the negative pressure generated by the operation of the drainage fan, the hot air flow from the air outlet bin will return to the working bin through the air duct, thereby realizing waste heat recovery.

2. A waste heat recovery device for a generator set according to claim 1, characterized in that: The exhaust control electric shutter controls the closing angle through the shutter controller to control the waste heat recovery airflow, the air duct is used to guide the airflow back to the working chamber for circulation, and the drainage fan is used to increase the waste heat airflow recovery amount and quickly mix the airflow entering the working chamber to make the working chamber temperature evenly distributed.

3. A waste heat recovery device for a generator set according to claim 1, characterized in that: The air duct is arranged below the waste heat recovery device of the generator set so that the hot air flow rises and mixes with the cold air.

4. The waste heat recovery device for a generator set according to claim 1, characterized in that: The air intake control electric shutter controls the natural air intake amount by closing the shutter controller, and the exhaust control electric shutter controls the waste heat recovery air flow by closing the shutter controller.

5. The waste heat recovery device for a generator set according to claim 1, characterized in that: The air outlet direction of the drainage fan is vertical and far away from the water tank cooling fan.

6. A waste heat recovery device for a generator set according to claim 1, characterized in that: Temperature sensors should be placed on the top and bottom of the internal combustion engine.

Images