AsconTecnologic’s Sigma I/O modules have been used under extreme ambient conditions to control temperature in a forehearth of a glass plant in Siberia.
The forehearth must grant a thermal process suitable to obtain a defined and stable glass temperature together with thermal homogeneity and stability. Also required is the capability to quickly reach the thermal stability after a job change.
Efficient conditioning depends on the mechanical characteristics of the forehearth and on the heating and cooling systems. Also latest state-of-the-art control systems allow to use the forehearth for a wider range of applications and tonnages.
The plant typically produces white glass bottles. An end fired furnace feeds a forehearth with two distribution sections and three lines to feed the forming machines. Each distribution section and each line has 2 to 5 zones for a total of 20 zones.
Temperature control of each zone is obtained by heating with gas fired burners or cooling by opening the roof of the forehearth and activating powerful fans.
The homogeneity of the melted glass to each forming machine needs to be monitored by measuring the temperature in three different points at three different levels for a total of 27 temperatures.
The area is subject to the low ambient temperatures, typical of this region, and becomes quickly hot when the glass flows, so the selected instrumentation should be able to sustain extreme temperatures.
Analogue I/O modules acquire the temperatures to be controlled in each zone of the glass distribution sections and forehearth lines. They also acquire the temperatures of the glass fed to the forming machines and detected by thermocouples directly plunged into the melted glass.
The 2500V insulation of the Sigma I/O modules allows the system to work properly notwithstanding the strong disturbances coming from the furnace electrodes.
Digital I/O modules are used to manage the safety interlocks of the forehearth and the interfaces with the rest of the plant.
Applications for hand-held instruments in nuclear power plants fall into two general categories, worker oriented and location oriented.
Worker Oriented Instrumentation
There are two levels of workers who use hand-held devices – those on the Rad Protection staff with a working knowledge of Health Physics and those with only a basic knowledge of radiation who perform specific tasks at the plant (electrician, mechanical technician, welder, etc.). CANBERRA offers hand-held HP instrumentation for both the sophisticated and less knowledgeable user.
Location Oriented Instrumentation (Boundary or Working Area Exit)
In order to avoid spreading contamination outside of the working area, it is important to monitor all tools, objects and individuals with a frisking device based on a multipurpose detector. This instrument is usually placed, for a period of time or permanently, at the exit of the area boundary. Instruments for this purpose include the Avior® 2000/4000 or MIP10 Digital and CANBERRA Smart Probes.
Osprey™: Digital MCA Tube Base for Scintillation Spectrometry
All-in-one HVPS, preamplifier, and digital MCA
Compatible with all standard 14-pin scintillation detectors, including NaI(Tl) and LaBr3(Ce)
A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. The media may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment.
The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.
To study this heat exchange principal at institute level, Elettronica veneta has introduced range of Heat exchanger equipment models.
This equipment consists of a service unit that supplies the necessary utilities and measuring instruments to carry out tests on four types of heat exchangers: tube-in-tube exchanger, plate exchanger, shell-and-tube exchanger and jacketed tank. The minimum purchasable configuration includes the service unit and one of these four exchangers.
The Data acquisition software with interface system is available as optional item.
This unit enables to deepen the following issues:
Heat transfer between fluids separated by a wall
Energy balance and calculation of efficiency
Log Mean Temperature Difference (LMTD)
Overall heat transfer coefficient (U)
How flow rate and of temperature difference can affect the transfer coefficient
Comparing the operating modes and performance of different types of heat exchangers
ADVANCETECH is an authorized distributor for Elettronica veneta products in India.