aluminum electrolysis pots
Rio Tinto
Hot source : Aluminum electrolysis process environment : pot shell, gas pipes ...
Cold source : Ambient air, natural convection
Customer issue :
The large amount of heat released in the aluminum electrolysis process complexifies its monitoring. On one hand, the wiring of the sensors involves an electrical risk and would be extremely costly to install and on the other hand, the surrounding heat strongly limits the life of the batteries, making it impossible to deploy this type of sensor.
MOÏZ solution :
The Harvestree module overcomes these problems to monitor the temperature of the electrolysis pots. Its magnetic attachment makes it extremely easy to install and allows it to be moved quickly and easily. The possibility of using one or more temperature sensors, external and/or remote, allows the temperature measurement of locations not accessible to the Harvestree module.
The aluminum electrolysis process produces a lot of heat. The Harvestree measurement modules can therefore be placed anywhere near the process to measure different quantities of interest.
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Autonomous temperature measurement
Urban heating company of grenoble
Hot source :
Hot water pipe
Cold source :
Ambient air in furnace room
Customer issue :
The operator is looking to measure temperatures that are absent from the existing supervision. The sensor wiring of the pipes to be monitored is complicated and costly to implement.
MOÏZ solution :
Our autonomous temperature measurement modules were quickly installed on a base plate adapted to the shape of the pipes. Temperatures are measured every 30 minutes and are accessible to the operator via a secure access to a cloud. An energy storage solution allows the information to be transmitted even when temperatures drop.
Temperature measurement of high voltage electrical conductors
CNR : Compagnie National du rhône (France's leading producer of exclusively renewable energy)
Hot source : High voltage conductor casing heated by the Joule effect
Cold source : Ambient air, natural convection
Customer issue :
The variations in the production of energy by the hydroelectric power plant lead to an increase in the temperature of the conductor bars by Joule effect. It is interesting to monitor these temperature increases to ensure that they do not exceed a critical temperature that could deteriorate the busbars. However, the high voltage/current values to which the bars are subjected to make it difficult to measure the temperature by contact, to wire a sensor or to change its battery.
MOÏZ solution :
By attaching to the insulating sheath surrounding the busbar, our sensor is able to use the temperature difference between the manhole and the ambient air to operate. Including an infrared temperature sensor, the Harvestree module is able to measure the temperature of the busbar every 10 minutes and to transmit the results every 2 hours.
Measurement of the temperature of the contact wire of catenaries
Sncf network/rail open lab
Customer issue :
Monitoring the temperature of the catenary contact wire is not easy to set up. Wired sensors would require a low voltage power supply that is not available near the tracks. As for battery-operated sensors, changing their batterie would require stopping train traffic.
MOÏZ solution :
Installed directly on the contact wire of catenaries, an autonomous measurement module co-developed by MOÏZ and the SNCF as part of the Rail Open Lab, precisely measures the temperature of the wire. Thanks to the sun's thermal contribution, our module ensures that the data is measured every 10 minutes and transmitted every 2 hours, regardless of the weather conditions encountered over time.
For more information, please visit the following web page :
Monitoring of cable connection
SNCF NETWORK
Hot source :
Heat losses due to DC current.
Cold source :
Ambient air
Customer issue :
Poor connections in DC cable connections can lead to overheating, which may result in fire hazards.
MOÏZ solution :
Mwo Harvestree devices are used to monitor cable temperature at various locations, and any threshold exceedance will trigger an alert to the appropriate techniciansOÏZ used its energy recovery technology to develop a proof of concept: a connected sensor measuring the air flow rate at the gas cylinder outlet. Our complete monitoring solution allows to reduce by a factor of 100 the power consumption compared to existing sensors on the market.