Field instrument temperature apparatus and related methods
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Solution Overview
Problem
Field devices in process control systems, such as sensors and valve controllers, experience reduced operability and lifespan when exposed to temperatures outside their operating range, leading to increased wear and damage, particularly in outdoor locations with varying climates.
Innovation Solution
The use of a vortex tube to generate streams of warm and cool air, which are directed to the field devices to maintain them within their optimal temperature range, utilizing compressed gas and eliminating the need for electrical power, thereby extending the devices' lifespan and operational effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If field devices are used in outdoor locations with varying climates, then the system can operate in more locations, but the field devices suffer increased wear and reduced operating lifespan due to exposure to temperatures outside their operating range
Solution Approach 1:
The patent applies parameter changes by using a vortex tube to alter the temperature parameter of the environment surrounding the field device. The vortex tube takes compressed gas at ambient temperature and separates it into hot and cold streams, allowing the housing temperature to be adjusted independently of ambient conditions. This enables the field device to operate within its specified temperature range even when installed in outdoor locations with extreme climates, thereby maintaining reliability while expanding location adaptability.
2Reliability
If electrical heating or cooling elements are added to maintain field device temperature, then the operating lifespan is extended, but the device complexity and electrical power requirements increase
Solution Approach 1:
The patent replaces electrical heating or cooling elements with a vortex tube that uses compressed gas to create thermal effects. The vortex tube utilizes the pneumatic principle of adiabatic expansion and compression of gas to generate hot and cold streams without any electrical components. This approach extends the operating lifespan of field devices by controlling their thermal environment while avoiding the increased complexity and power requirements associated with electrical heating or cooling systems.
3Temperature
If electrical power is provided to field devices for temperature control, then the temperature can be maintained within operating range, but the requirement for electrical power supply infrastructure increases
Solution Approach 1:
The vortex tube system is self-service in that it generates its own hot and cold streams from compressed gas without requiring external electrical power. The compressed gas, which is already available in many industrial settings for other purposes, serves as the energy source. The vortex tube internally converts the kinetic energy of the compressed gas into thermal energy through vortex flow, eliminating the need for electrical power supply infrastructure while maintaining temperature control capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows field devices to operate effectively in a wider temperature range, reducing wear and extending their lifespan while eliminating the need for electrical power, making them suitable for harsh environments.
Implementation Method 1
a vortex tube having an inlet to receive a fluid, a first outlet to dispense a first portion of the fluid at a first temperature and a second outlet to dispense a second portion of the fluid at a second temperature
Data Source
AI summary
Example field instrument temperature apparatus and methods for affecting or regulating a temperature of a field instrument are disclosed. An example apparatus includes a vortex tube having an inlet to receive a fluid, a first outlet to dispense a first portion of the fluid at a first temperature and a second outlet to dispense a second portion of the fluid at a second temperature, the second temperature being greater than the first temperature. The example apparatus also includes a first passageway fluidly coupled to the first outlet to direct the first portion of the fluid to an electronic device in a process control system to affect a temperature of the device.