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Computer Controlled Thermal Solar Energy Unit

 
 
 

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DESCRIPTION

The unit is a system that transforms solar energy into calorific energy. It uses the thermosiphon system to heat water or the traditional pumping system. In both cases, the absorbed calorific energy is given by the solar radiation simulated, in our case, by a panel with powerful luminous sources. This Computer Controlled Unit, is supplied with the EDIBON Computer Control System (SCADA), including: Control Interface Box + Data Acquisition Board + Computer Control and Data Acquisition Software, for controlling the process and the parameters involved.

 

SPECIFICATIONS

EESTC. Unit:
Anodized aluminium structure. Main metallic elements in steel. Diagram in the front panel with similar distribution to the elements in the real unit.
Solar panel (Thermal solar collector):
Steel structure.
Pipes (already prepared) to connect the panel and the accumulator
(copper pipes)
Over pressure security valve.
Manometer, range: 0-4 bar.
o Temperature sensors, type “J “, range: -40 to 750 C.
Thermal accumulator tank (from 150 to 200 l. approx.):
Vacuum vitrified heater, high efficiency heating and anti-corrosion
protections.
It has a supporting heating group, with a regulation electric resistance.
Range of the resistance: 3000W.
Contact thermostat to control temperature.
Solar simulator:
Aluminum structure regulated in height.
Sixteen ultraviolet lamps of 300 W each one.
Electricity security group, made up by 3 magnetothermics.
Feed wire.
With this unit you can simulate three operating possibilities: with all the
lamps on (16), with half of the lamps on (8), and with only one lamp on.
Pumping equipment:
Impulse pump, computer controlled, range: 0-2l./min.; 0.6 bar.
Flowmeters:
One of 0-2 l./min. in the primary circuit (forced circulation, with pump).
One of 4-60cc/min. in the primary circuit (free circulation, without pump).
One of 2-10l./min. in the secondary circuit.
Flow sensors, range: 0.2 - 6.5 l./min.
o 10 Temperature sensors, type “J “, range: -40 to 750 C.
Protection curtains.
EESTC/CIB. Control Interface Box :
Control interface box with process diagram in the front panel and with the same distribution that the
different elements located in the unit, for an easy understanding by the student.
All sensors, with their respective signals, are properly manipulated for -10V. to +10V computer output. Sensors
connectors in the interface have different pines numbers (from 2 to 16), to avoid connection errors. Single cable
between the control interface box and computer. The unit control elements are permanently computer
controlled, without necessity of changes or connections during the whole process test procedure.
Simultaneously visualization in the computer of all parameters involved in the process.
Calibration of all sensors involved in the process.
Real time curves representation about system responses. Storage of all the process data and results in a
file. Graphic representation, in real time, of all the process/system responses.
All the actuators’ values can be changed at any time from the keyboard allowing the analysis about
curves and responses of the whole process. All the actuators and sensors values and their responses are placed
in only one computer screen.
Shield and filtered signals to avoid external interferences.
Real time computer control with flexibility of modifications from the computer keyboard of the
parameters, at any moment during the process. Real time computer control for pumps, compressors,
resistances, control valves, etc. Open control allowing modifications, at any time and in a real time , of
parameters involved in the process simultaneously.
Three safety levels, one mechanical in the unit, other electronic in control interface and the third
one in the control software.
DAB. Data Acquisition Board:
PCI Data acquisition board (National Instruments) to be placed in a computer slot. Bus PCI.
Analog input: Number of channels= 16 single-ended or 8 differential. Resolution=16 bits, 1 in 65536.
Sampling rate up to: 250 KS/s (Kilo samples per second). Input range (V)= 10V. Data
transfers=DMA, interrupts, programmed I/0.Number of DMA channels=6.
Analog output: Channels=2. Resolution=16 bits, 1 in 65536. Maximum output rate up to: 833 KS/s.
Output range(V)= 10V. Data transfers=DMA, interrupts, programmed I/0. Digital Input/Output:Channels=24 inputs/outputs. D0 or DI Sample Clock frequency: 0 to 1 MHz.
EESTC/CCSOF. Computer Control+Data Acquisition+Data Management Software:
Compatible with actual Windows operating systems. Graphic and intuitive simulation of the process in screen. Compatible with the industry standards. Registration and visualization of all process variables in an automatic and simultaneously way. Flexible, open and multicontrol software, developed with actual windows graphic systems, acting simultaneously on all process parameters. Management, processing, comparison and storage of data. Sampling velocity up to 250,000 data per second guaranteed. Student calibration system for all sensors involved in the process. It allows the registration of the alarms state and the graphic representation in real time. Comparative analysis of the obtained data, after the process and modification of the conditions during the process. Open software, allowing to the teacher to modify texts, instructions. Teacher’s and student’s passwords to facilitate the teacher’s control on the student, and allowing the access at different work levels. This unit allows that the 30 students of the classroom can visualize simultaneously all results and manipulation of the unit, during the process, by using a projector. Cables and Accessories, for normal operation.
Manuals:
This unit is supplied with 8 manuals: Required Services, Assembly and Installation, Interface and Control
Software, Starting-up, Safety, Maintenance, Calibration & Practices Manuals.