Control system using high-temperature tail gas for refrigeration and its control method

Abstract

The invention discloses a control system by utilization of high-temperature tail gas for refrigeration and a control method thereof. The control system comprises a cooling liquid thermostat and a heatexchanger, wherein, an outlet and an inlet on the heat side of the heat exchanger are respectively connected with a first tail gas reversing valve and a second tail gas reversing valve. The control system also comprises a setting unit, a room temperature detector and a control unit, wherein, the setting unit is used for setting a preset room temperature value; the room temperature detector is used for detecting the current room temperature and obtaining the detected room temperature value; the control unit is used for comparing the detected room temperature value and the preset room temperature value; when the detected room temperature value is more than the preset room temperature value, the tail gas reversing valve is driven by a control motor to rotate towards the increasing direction;when the detected room temperature value is less than the preset room temperature value, the tail gas reversing valve is driven by the control motor to rotate towards the reducing direction; and theprocess is performed until the detected room temperature value is equal to the preset room temperature value. The control system controls the tail gas reversing valve according to the preset temperature and the ambient room temperature and finally achieves the aim of intelligent energy conservation.

Description

【Technical field】 [0001] The invention relates to the technical field of control, in particular to a control system and a control method for cooling by using high-temperature tail gas. 【Background technique】 [0002] In a diesel engine, the exhaust energy emitted by the diesel engine and the energy taken away by the cooling fan account for about two-thirds to three-fifths of the total calorific value of the fuel, and this part of the energy is called waste heat. Therefore, people have been working on how to use the waste heat of diesel engines to achieve the purpose of saving energy and reducing consumption. One of the effective ways to improve the utilization rate of fuel energy is to use the waste heat of diesel engine to drive the absorption air conditioning system for refrigeration. [0003] The current system for refrigerating by using the waste heat of the diesel engine generally includes setting a three-way pipe A from the outlet of the diesel engine coolant thermost...

AI Technical Summary

Problems solved by technology

However, the above-mentioned control method and control device are designed for the exhaust gas refrigeration unit of the fishing boat, and cannot realize the control of using the exhaust gas of the diesel engine in the diesel engine room for indoor refrigeration.

In the system that uses the exhaust gas of the diesel engine in the diesel engine room for indoor refrigeration, to adjust the cooling capacity of the refrigeration device, it is necessary to adjust the exhaust reversing valve of the exhaust heating pipe to control the amount of high-temperature exhaust gas flowing into the heating water tank. The control has the problems of untimely control and inconvenient operation, and manual operation is used to adjust the exhaust reversing valve only based on the experience of the operator, and errors will inevitably occur

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