Control method of heat pump control system based on dcs

A control system and control method technology, applied in heat pumps, refrigerators, refrigeration components, etc., can solve problems such as inconvenient control and poor reliability, and achieve the effects of convenient operation, easy development, and high reliability

Active Publication Date: 2015-12-09
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a control method for a heat pump control system based on DCS (distributed control system) in order to overcome the problems of inconvenient control and poor reliability of the existing heat pump control system

Method used

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  • Control method of heat pump control system based on dcs
  • Control method of heat pump control system based on dcs
  • Control method of heat pump control system based on dcs

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine Figure 1 to Figure 4 To illustrate this embodiment, the DCS-based heat pump control system described in this embodiment includes a human-computer interaction device 1, a network communication system 2, and a distributed process control station 3;

[0022] The distributed process control station 3 includes an analog measurement circuit 3-1, a switch input card 3-2, a CPU 3-3, an analog output card 3-4 and a digital output card 3-5;

[0023] The analog measurement circuit 3-1 includes an analog input card 3-1-1 and a thermal resistance measurement card 3-1-2, and the analog input card 3-1-1 is used to collect steam flow and circulating water flow , the liquid level of the drain tank and the steam extraction pressure information, and the thermal resistance measurement card 3-1-2 is used to collect temperature information, the temperature information includes the inlet temperature and outlet temperature of circulating water, the in...

specific Embodiment approach 2

[0073] Embodiment 2: This embodiment further limits the DCS-based heat pump control system described in Embodiment 1. In this embodiment, the model of the analog input card 3-1-1 is NT200-AI16.

specific Embodiment approach 3

[0074] Embodiment 3: This embodiment is a further limitation of the DCS-based heat pump control system described in Embodiment 1. In this embodiment, the model of the thermal resistance measurement card 3-1-2 is NT200-RTD16.

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Abstract

The invention discloses a heat pump control system based on a DCS and a control method thereof, relates to the technical field of heat pump control, and aims to solve the problems that control can not be conveniently carried out through an existing heat pump control system and the existing heat pump control system is poor in reliability. By means of the heat pump control system based on the DCS and the control method thereof, physical quantities such as the temperature, the flow, the liquid level and the pressure can be monitored in real time; a CPU carries out calculation according to the monitored temperature and a received temperature control signal to determine the working state of each heat pump, and sends a heat pump control signal to a heat pump system through an analog quantity output card and a digital quantity output card to achieve automatic control over the heat pump system. The control method is more convenient and faster to implement than a PLC control system, the change of each physical parameter in the heat pump system can be monitored in real time, a complex control process can be achieved, and the control method has higher reliability. Furthermore, the DCS is easy to develop and convenient to operate, and programming can be easily achieved through configuration software. The heat pump control system based on the DCS and the control method thereof are suitable for systems for recycling waste heat of power plant circulating cooling water.

Description

technical field [0001] The invention relates to the technical field of heat pump control. Background technique [0002] The heat pump is the main equipment of the waste heat recovery and utilization system of the circulating cooling water in the power plant. The existing heat pump control adopts PLC to control and monitor the production process. Due to the characteristics of PLC industrial technology and equipment, it is difficult for thermal engineers to modify and optimize the control program, and Safety optimization operation cannot be performed according to the actual operating conditions of the power plant. Adjusting the efficiency and load of heat pump operation requires professionals to operate on the control panel of the heat pump body, and the problem is not dealt with in time, and there is no communication and coordinated control among multiple heat pumps. As an important production equipment, the heat pump's operating status and real-time parameters are only moni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/00F25B30/00
Inventor 金洪伟魏庆新杨家农崔大海
Owner HARBIN TURBINE
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