(Đồ án hcmute) monitoring and controlling chiller system by computer use plc siemen s7 1200

MINISTRY OF EDUCATION AND TRAINING HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY FOR HIGH QUALITY TRAINING GRADUATION PROJECT THERMAL ENGINEERING TECHONOLOGY MONITORING AND CONTROLLING CHILLER SYSTEM BY COMPUTER USE PLC SIEMEN S7 - 1200 ADVISOR: LAI HOAI NAM STUDENT: NGUYEN HO CONG THANH SKL Ho Chi Minh City, January, 2023 HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY OF HIGH QUALITY TRAINING - - UNDERGRADUATE THESIS MONITORING AND CONTROLLING CHILLER SYSTEM BY COMPUTER USE PLC SIEMEN S7 - 1200 Student: Nguyen Ho Cong Thanh ID: 19147053 Lectures: Lai Hoai Nam HCMC, 30th January 2023 HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY OF HIGH QUALITY TRAINING - - UNDERGRADUATE THESIS MONITORING AND CONTROLLING CHILLER SYSTEM BY COMPUTER USE PLC SIEMEN S7 - 1200 Student: Nguyen Ho Cong Thanh ID: 19147053 Lectures: Lai Hoai Nam HCMC, 30th January 202 HO CHI MINH CITY UNIVERSITY OF FACULTY OF HIGH TECHNOLOGY AND EDUCATION QUALITY TRAINING ******************************* ******************* UNDERGRADUATE THESIS TASK DEPARTMENT: FACULTY OF VEHICLE AND ENERGY ENGINEERING SUBJECT: HEAT - REFRIGERRATION TECHNOLOGY MAJOR: THERMAL ENGINEERING TECHNOLOGY NAME OF STUDENT: NGUYEN HO CONG THANH ID: 19147053 ACADEMIC YEAR: CLASS: 19147CLA 2019-2023  Topic name: MONITORING AND CONTROLLING CHILLER SYSTEM BY COMPUTER USE PLC SIEMEN S7 – 1200  Commission: Create archetype using S7 1200 for Monitoring and controlling chiller system Demonstration value of temperature and pressure on PC screen Controlling combine inverter technology on PLC S7 1200 Simulation principle of chiller system on WinCC screen  Assignment date: 1/11/2022  Exhaustive date: 19/2/2023  Instructor : LAI HOAI NAM Department chairman Instructor (sign and write full name) (sign and write full name) HO CHI MINH CITY UNIVERSITY FACULTY OF HIGH OF TECHNOLOGY AND QUALITY TRAINING EDUCATION ******************************* ******************* FEEDBACK FOR UNGERGRADUATE THESIS (Instructor's comment) Full name of student: Nguyen Ho Cong Thanh Student ID:19147053 Major: Thermal Engineering Topic: “Monitoring and controlling chiller system by computer use PLC S7 1200’’ Full name of the instructor: Lai Hoai Nam FEEDBACK Comment on work spirit and attitude ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………… Comments on implementation results 2.1 Structure, way of presentation ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………… 2.2 Thesis content: (Theoretical basis, practicality and applicability of the project, research directions can continue to develop) ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………… 2.3 Result achieved : ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………… 2.4 Existences (if any): ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………… Evaluate : No Reviews section Maximum Score score achieved Form and texture of thesis 30 Correct format with full form and content of entries 10 Objectives, tasks, overview of the topic 10 The urgency of the subject 10 Thesis content 50 Ability to apply knowledge of mathematics, science and engineering, social sciences… Ability to perform/analyze/synthesize/evaluate 10 The ability to design and manufacture a system, component, or process that meets a given 15 requirement with realistic constraints Ability to improve and develop 15 Ability to use technical tools, specialized software… Evaluate the applicability of the topic 10 Specific products of the thesis 10 Total score 100 Conclude: ☐ Allowed to defend the thesis ☐ Dissertation defense is not allowed Ho Chi Minh, …./…/2023 Instructor (Signature) HO CHI MINH CITY UNIVERSITY FACULTY OF HIGH OF TECHNOLOGY AND QUALITY TRAINING EDUCATION ******************************* ******************* FEEDBACK FOR UNGERGRADUATE THESIS (Reviewer’s comment) Full name of student: Nguyen Ho Cong Thanh Student ID: 19147053 Major: Thermal Engineering Topic: “Monitoring and controlling chiller system by computer use PLC S7 1200’’ Full name of the reviewer: …………………………………………………… FEEDBACK Structure, way of presentation ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………… Thesis content: (Theoretical basis, practicality and applicability of the project, research directions can continue to develop) ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………… Result achieved: ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………… The shortcomings and existence of thesis ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………… Questions: ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………… Evaluate : No Reviews section Maximum Score score achieved Form and texture of thesis 30 Correct format with full form and content of entries 10 Objectives, tasks, overview of the topic 10 The urgency of the subject 10 Thesis content 50 Ability to apply knowledge of mathematics, science and engineering, social sciences… Ability to perform/analyze/synthesize/evaluate 10 The ability to design and manufacture a system, component, or process that meets a given 15 requirement with realistic constraints Ability to improve and develop 15 Ability to use technical tools, specialized software… Evaluate the applicability of the topic 10 Specific products of the thesis 10 Total score 100 Conclude: ☐ Allowed to defend the thesis ☐ Dissertation defense is not allowed Ho Chi Minh, …./…/2023 Reviewer (Signature) Undergraduate Thesis Lecture: Lai Hoai Nam This light will turn on when Chilled water pump problem ( cooling tower pump problem ) there are not water move inside the pipe to cooling tower The flow switch sensor ( FS ) will send a signal to turn on this light and shutdown chilled water pump and turn on alarm This light will turn on when there are no water move inside Cold water pump problem the tube that the flow switch will send a signal and it shutdown the cold water pump beside that, turn on the alarm This light turn on when the temperature of shell compressor is higher than the Thermistor temperature that producer set up in the catalogue it will shutdown the compressor and turn on the alarm This light turn on when there are no problem with phase like loss phase revise,… the PCR Phase protection ( phase control relay ) send a signal to PLC to turn on alarm and it does not allow to turn on the equipment Overload of compressor This light turn on when the current move over the thermal relay higher than the current 94 Undergraduate Thesis Lecture: Lai Hoai Nam that set up it send a signal to PLC and shutdown the compressor and turn on the alarm This light turn on when the current move over the thermal Overload cooling tower pump relay higher than the current that set up it send a signal to PLC and shutdown the pump of cooling tower and turn on the alarm This light turn on when the current move over the thermal Overload of cold water pump relay higher than the current that set up it send a signal to PLC and shutdown the cold water pump and turn on the alarm This light turn on when the current move over the thermal Overload cooling tower fan relay higher than the current that set up it send a signal to PLC and shutdown the fan of cooling tower and turn on the alarm This light turn on when the Under charge mass of refrigerant in system is low 95 Undergraduate Thesis Lecture: Lai Hoai Nam Flash gas There are some of problem with valve before throttle valve This light turn on it mean that Dirty evaporator the evaporator need to be cleaned This light turn on it mean that Dirty condenser the condenser need to be cleaned This light turn on when the Lack of cooling water/air pass thought the coil fluid in evaporator are decrease and need to be added more Throttle valve clogging This light turn on it mean the throttle valve have dirty inside and need to be cleaned This light turn on when the Lack of chilled water/air pass thought the coil fluid in condenser are decrease and need to be added more This light turn on it mean that Compressor too small the load of compressor can supply is lower more than the load needed This light turn on when there Non-condensable are non-condensable gas inside gas test and need to test it if it not have non-condensable it mean the 96 Undergraduate Thesis Lecture: Lai Hoai Nam gas in system are too much 4.4 Set up screen As saying above, before running system, user must be set up al the parameter of system like high pressure, low pressure, oil pressure, temperature of cold water,… And this is the set up screen Figure 7: Set up screen Figure 8: High pressure set up High pressure set up for system, base on the refrigerant that system use, user need to set up suitable for system The refrigerant used in a system determines the appropriate settings for high-pressure relays The "set up" and "diff" values must be properly filled in during the setup process The "set up" value is the upper limit of the pressure that the sensor can measure, and if the pressure exceeds this value, the compressor will shut down to protect the system The "diff" value represents the difference between the "set up" value and the lower limit at which the compressor will start again By setting the "set up" and "diff" values based on the refrigerant used in the system, the high- 97 Undergraduate Thesis Lecture: Lai Hoai Nam pressure relay can effectively control the pressure and ensure the safe and efficient operation of the refrigeration system Figure 9: Low pressure set up Low pressure set up for system, base on the refrigerant that system use, user need to set up suitable for system The same principle applies to lowpressure relays In the setup process, the "set up" and "diff" values must be properly filled in The "set up" value represents the lower limit of the pressure that the sensor can measure, and if the pressure falls below this value, the compressor will shut down to protect the system The "diff" value represents the difference between the "set up" value and the upper limit at which the compressor will start again By setting the "set up" and "diff" values based on the refrigerant used in the system, the low-pressure relay can effectively control the pressure and ensure the safe and efficient operation of the refrigeration system 98 Undergraduate Thesis Lecture: Lai Hoai Nam Figure 10: oil pressure set up The "set up" and "diff" values must be properly filled in during the setup process The "set up" value represents the lower limit of the pressure that the sensor can measure, and if the pressure falls below this value, the switch is activated and the compressor is turned off The "diff" value represents the difference between the "set up" value and the upper limit at which the switch is deactivated and the compressor is turned on again By setting the "set up" and "diff" values based on the refrigerant used in the system, the oil pressure relay can effectively control the pressure and ensure the safe and efficient operation of the refrigeration system Figure 11: Cold water temperature This will set up the temperature of cold water if temperature of cold water is lower than set up, it will turn of condenser and compressor When the 99 Undergraduate Thesis Lecture: Lai Hoai Nam temperature of cold water is higher than set up + diff , it compressor and condenser run again 4.5 Water chiller system screen Figure 12: Water chiller system screen In this screen we will have the value of pressor, temperature of system Table 8: List key and description of water chiller system screen Key Description High pressure of discharge line of compressor Low pressure of suction line of compressor Temperature of water to the cooling tower 100 Undergraduate Thesis Lecture: Lai Hoai Nam Temperature of cold water move to FCUs, AHUs, PAUs,… 4.6 Parameter screen Figure 13: Parameter screen In this screen show all the parameter that while system running Since we not have enough equipment so we using simulation Table 9: List key and description of parameter screen Key Description The temperature of water leaving the cooling tower to condenser 101 Undergraduate Thesis Lecture: Lai Hoai Nam Temperature of cold water entering evaporator Simulation of thermistor in compressor Simulation flow switch of chilled water 102 Undergraduate Thesis Lecture: Lai Hoai Nam Simulation temperature sensor for each valve Simulation subcooling of refrigerant Simulation superheated of refrigerant 103 Undergraduate Thesis Lecture: Lai Hoai Nam Simulation flow switch of cold water level 104 Undergraduate Thesis Lecture: Lai Hoai Nam CHAPTER V: CONCLUSION AND FUTURE WORK 5.1 Conclusion During the implementation of the graduation project, under the dedicated and enthusiastic guidance of the teachers of Thermal Engineering Technology, I was able to complete the project I have studied about operating the system through the use of a PC or laptop, so I have chosen the topic "Monitoring and controlling Chiller system by computer use PLC Siemens S7 1200" I have researched, researched and learned on industry-related documents along with learning from seniors and seniors who have been working in large companies to give more accurate results Thanks to that, I can know that the application of PLC S7-1200 in operating refrigeration systems today is gradually becoming more and more popular such as Nestle Binh An factory, Nestle Tri An, Lavie water factory in Long An they have use PLC in operating and monitoring the operating refrigeration system to check the machine's performance, COP coefficient, pressure, temperature and make predictions about errors that may be in the system encountered 5.2 Future Work For students and engineers who have just graduated from college, the use of PLCs to operate in the system is still quite new and has not been popularized in schools and classrooms, so they still have many difficulties in finding documents and handling problems difficult error to encounter However, not only did that make me frustrated, I tried to learn more about the new capabilities of the S7-1200 PLC such as using PID instruction blocks to control the inverter, using and creating web server, operating the system using the same network via router, operating the system via wifi network using both router and modem and many other applications of PLC that can be applied to operating the refrigeration system 105 Undergraduate Thesis Lecture: Lai Hoai Nam Before the development of science and technology, in this 4.0 era, the use of PLC will bring more benefits to compressor operation, protecting people from unnecessary labor accidents Not only that, the use of PLC also brings high accuracy due to the use of sensors, low-bias electronics, which makes it easier and more accurate to diagnose errors in the system For the above reasons, I hope you can include this PLC subject in specialized subjects so that you can keep up with the trend of companies specializing in system operation I sincerely thank you! 106 Undergraduate Thesis Lecture: Lai Hoai Nam Reference [1] Máy nén thiết bị hệ thống lạnh – TS Lê Xuân Hòa – 2007 [2] PLC analog inputs and signals – The realpars team – October 8th, 2018 [3] Industrial Platinum Resistance Thermometer – Beamex – 2018/12 [4] All About PLC Analog Input and Output Signals and Programming – Peter March 21st, 2018 [5] C-mac product catalog – Comadan A/S [6] Data sheet SIMATIC S7-1200, Analog input, SM 1231– Siemens – 1.17.2021 [7] Data sheet SIMATIC S7-1200, CPU 1212C, compact CPU, AC/DC/relay Siemen – 1.17.2021 [8] Valves and pipeline systems for general cargo ship – Marine engineering note for Cargo ship [9] S7-1200 Programmable controller System Manual – Siemens AG – 04/2012 107 S K L 0