Before start is very important know Logo! Siemens Learn first time with PLC Logo! Siemens and also Measure Temperature using PT100 in PLC Logo Siemens

PROJECT OBJETIVE

There is not Power Supply and the Cliente want to do a Luxury Loge, with Thermal POOl and an amazing place to rest

What is the Solution if we don't have electrical supply and Feasibility??

INSTALLING GAS ENGINE-GENERATOR

This is the begin of an excellent project, in this case will install Gas Engine-Generator 100kW, always is important consider features of generator:

• THE MOST IMPORTANT; the Cooling process of Motor MUST to be by "Refrigerant and Radiator"
• All Workers in Gas Pipings and fittings must to be Certified
• The Engine-Generator is very NOISE always consider sound insulation
• The Engine-Generator has Vibrations, remember when you "mount" the Generator must avoid the places when the people may walk; if you mount this in a Roof; surface of Roof will vibrate too
• Engine Generator must to be Good Quality and have internal proteccions for his mechanical parts; electronic Power ON and OFF

THERMODYNAMIC

The Engine-Generator has other important feature that create Electrical Power, COGENERATION of energy allow us get the REFRIGERANT from Motor and create Thermal Energy by a HEAT EXCHANGER

Also will use Thermal Energy from the Exhaust GAS (CO) from Combustion in Generator; So in this moment we have 2 functions importants to heat from a Generator, all this energy weill be used to HEAT THE POOL WATER

CONTROL ENGINEERING

All this process is very important for Control, Monitoring, Dataloggers; will Programming a PLC Logo! Siemens and a TDE Screen Siemens

Engineering and Programmation must to consider:

• 5 Thermocouples PT100
• 1 PLC Logo Siemens
• 2 Spin Electromechanical Valves
• 1 Proportional Actuator/Valve 0-10 Volts
• 1 Screen Display TDE Siemens
• 1 Memory Card SD for Datalogger

For thiscase the Professional of Mechanical Engineer must to be clear in the process as:

• Choose Better Gas Engine-Generator and Gas Pipes
• Choose Correctly the HEAT EXCHANGER
• Pressure, Flow and Temperature, variables very importants
• Piping and Unions, Impossible have Leaks in Gas and Water
• Insulation Sound with special materials
• Vibrations
• Correct Installation of Thermocouple in Threaded Pipes and Couples
• All Information about Generator Maintenance

For a easy understanding will see the FLOW DIAGRAM to understand quickly how we get the Thermal Energy that will use to HEAT the Water of the Thermal Pool

Download Layout Flow Diagram Cogeneration

Flow Diagram and Pipings Connections in Project

Importants Materials using in Mechanical Engineering for this project

Particularly for this project we'll see only Control and Thermodynamic; will not see the Pumps and the power systems that feed the water in the Pool:

CHOOSE PLC

For this project we want to choose a great PLC; LOGO SIEMENS to manage:

• 5 Thermocouples PT100
• 1 PLC Logo Siemens
• 2 Spin Electromechanical Valves
• 1 Proportional Actuator/Valve 0-10 Volts
• 1 Screen Display TDE Siemens
• 1 Memory Card SD for Datalogger

Download Layout Control and Electrical Engineering

General Diagram Control and Electrical Engineering

For example will work with his Proportional Actuator 0-10V

Remember you can learn from 0 Learn for first time PLC Logo and Download DEMO and find all instructions as Scale RTD Modules PT100 in PLC Logo! and for more talent Programming Analog Ouutputs 0-10 Volts in PLC Logo Siemens

Begin to define the most important points the Programmation:

• The Thermocouple "T1" is the reference Temperature of the POOL
• The Perfect Temperature of Pool is 32°C, it means "T1" the better measure is on 32°C
• The main Source of Thermal Energy is the Plate Heat Exchanger; here are the Temperature "T3" from Refrigerant Motor VS "T1" and the Result is "T2"
• The Final Temperature "T5" is the New Water Temprature that will be now into the Pool and will begin to get Hotter the water Pool; for that reason "T1" will be Hotter too
• Remember if we have the ideal temperature (32°C) and Pipes and Pool are in Insulation Temperature Rooms, Temperature of Pool will be stable; in every project you must to consider all this parameters that all may affect an excellent thermodynamic project
• Plates Heat Exchanger will be as the "Radiator" that the Refrigerant after this will Cool the Motor

Define Control Logic:

1. If "T1" is Lower than 30°C both Heat Exchanger (Pipes and Plates) will work, it means, the water will begin to HEAT


2. When both Heat Exchanger are working means that Proportional Actuator will have 10 Volts and the Refrigerant will pass by Plates Heat Exchanger; The Valves V1 and V2 make to pass the Exhaust Gas by Pipe Heat Exchanger


3. When "T1" is higher than 30°C will change the Flow of Gas Exhaust and will not pass by Pipe Heat Exchanger, only will heat by Plates Heat Exchanger


4. When the Temperature is higher than 32°C in "T1" both Heat Exhangers will be closed and the Refrigerant and Gas Exhaust will follow the normal road (radiator and normal exhaust), by Thermodynamic Law Temperature will reach 33-34°C only with the Temperature of Pipes and Piscine; then the temperature will dicrease until reach again 31-32°C


5. Temperatures "T2" - "T3" - "T4" - "T5" are only for monitoring and data

Scale RTD Inputs by Amplifiers for each Instruction for monitoring; Each Amplifier for each Temperature AI

Let's Create an Analog Threshold Trigger and maximum of 30°C will use this Trigger for Temperatures Lower than <30°C; BOTH heat exchangers will work under 30°C

Let's create other Analog Threshold Trigger Higher than 30°C will use it for Temperatures over >30°C, Remember over 30°C Will Close Pipe Heat Exchanger

Create Apart other Threshold Trigger only for Plates Heat Exchanger remember this Heat Exchanger Operate directly over Proportional Actuator; maximun Temperature 32°C and Add other important block ANALOGIC MUX for create 0-10 Volts Analog Output Signal

You can see in Specifications 2-10V but for assure the real Flow = 0; will work in absolut value 0-10 Volts; it means 0% Closed VS 100% OPEN; will not work modifying the flow

CONFIGURATION & MONITORING

Let's Configure TDE Screen using 2 Pages(display); Main and Temperature add the follow blocks:

Configuration of first Page(display), NOTE blocks must to be configured as the image shows (taking in consideration Priority and programmation blocks):

Then select the second blocks of Temperatures and begin to configure in TDE each one:

You can see the Temperature is higher....Excellent Project!

NOTE: In case we are working with PLC Logo! 12/24 RCE (24 Volts) verify that default configuration AI and AQ are showed as image, (0-10V and 0AI enabled), for assure that "AI1" is the same that RTD MODULE verify in File -> Properties -> I/O Settings -> Enable 0 AI; Logo 12/24 have integred 0-10 Volts AI and you must disable it

Configure the follow block; FLAGS (Marcas), Timers and Datalogger; the first Timer will be the Time that you will take the DATA; it works nice in Logo!

Go inside Block Datalogger and select the values of Amplifier, then select and Insert Parameters; this programmation is for Constant Analog Input Values

We can review from LOGO SOFT the Data in SD Memory that we have installed, after installed SD automatically the data will start to save into SD; remember is very important connect blocks as image

Remember always if you forget IP of PLC go to => NETWORK => IP ADDRESS, your PC must to be in same Network than PLC (example IP Photo 192.168.0.3), Your PC may has a IP 192.168.0.5

Remember to communicate correctly by Ethernet TDE and PLC must to be in same Subnetwork

After we have IP of PLC go to Wifi or Internet Icon, click on "Network and Sharing Center" --> Change Adapter Settings --> Ethernet/Realtek/other --> Propierties --> Internet Protocol Version 4 TCP/IPv4 and change IP to same Sub Network PLC with other last number device