Temperature Setpoint Calculation for Dew Condensation Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In laboratory settings, temperature control of specimens for degradation evaluation is inaccurate due to temperature differences between the thermostatic tank and the specimen, especially when dew condensation is induced by a temperature difference, leading to ineffective test results.
Innovation Solution
A calculation apparatus and method that acquire and generate approximation expressions to accurately control the temperature of a temperature-controlled member by correlating outside and specimen temperatures, allowing precise temperature setting for tests like corrosion tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a thermally conductive sheet is sandwiched between the temperature control portion and the specimen, then thermal contact is improved, but the temperature of the specimen still does not reach the temperature of the temperature controlling member, resulting in insufficient temperature control accuracy
Solution Approach 1:
The system measures the actual temperature of the specimen and uses this feedback to calculate and adjust the required outside temperature. The calculation unit computes the relationship between outside temperature and specimen temperature, then adjusts the outside temperature setting to compensate for thermal resistance, ensuring the specimen reaches the desired temperature.
Solution Approach 2:
The system changes the parameter being controlled from direct contact temperature to outside temperature. Instead of trying to improve thermal contact, the invention calculates the appropriate outside temperature based on measured temperature differences and thermal characteristics, then sets the environment chamber temperature accordingly.
2Stability of the object's composition
If the temperature of the thermostatic tank is set to be the same as the specimen temperature, then temperature uniformity is achieved, but temperature control of the specimen becomes impossible when dew condensation is induced by temperature difference
Solution Approach 1:
The system separates the temperature parameters of the thermostatic tank and the specimen. Instead of maintaining equal temperatures, the invention calculates the required outside temperature (tank temperature) based on the desired specimen temperature and the measured thermal relationship, enabling independent control of both parameters.
Solution Approach 2:
The system performs preliminary measurement of the temperature relationship between the thermostatic tank and specimen at different temperatures. This preliminary data is stored and used to calculate the appropriate outside temperature before actual testing, enabling accurate temperature control without trial and error.
3Use of energy by moving object
If direct contact between the temperature controlling member and the specimen is maintained, then heat transfer efficiency is improved, but the temperature difference required for dew condensation cannot be achieved
Solution Approach 1:
The system changes the approach from controlling heat transfer through contact to controlling the outside temperature parameter. By calculating and setting the thermostatic tank temperature based on the desired specimen temperature and measured thermal characteristics, the system achieves both heat transfer efficiency and temperature difference for dew condensation.
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
Enables accurate temperature control of the specimen, resulting in more reliable test results by determining the required outside temperature to achieve the desired specimen temperature, even when the temperature controlling member and specimen are not in direct contact.
Implementation Method 1
a method may be performed by bringing the specimen incorporating a sensor into contact with a temperature controllable member (temperature control portion), as illustrated in FIG. 1, for example, and controlling the temperature of the specimen
Data Source
AI summary
A calculation apparatus includes a first acquisition unit that acquires a first approximation expression based on a change in a temperature of a temperature controlled member with respect to a change in an outside temperature measured for a plurality of temperatures of a temperature controlling member, a second acquisition unit that obtains a second approximation expression based on the first approximation expression, a temperature input unit that receives input of a first set temperature of the temperature controlled member and a second set temperature of the temperature controlling member, a generation unit that substitutes the second set temperature into the second approximation expression to generate a third approximation expression representing relationship between the outside temperature and the temperature of the temperature controlled member, and a calculation/output unit that substitutes the first set temperature into the third approximation expression to calculate an outside temperature to be set.