Satisfaction calculation device, satisfaction calculation method, and computer readable medium
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods, such as those described in Patent Literature 1, fail to effectively quantify user satisfaction with air quality in a space, as they do not adequately evaluate qualitative information related to air quality satisfaction.
Innovation Solution
A satisfaction calculation device that includes a specific enthalpy calculation unit to determine temperature and humidity, and an air quality satisfaction calculation unit that uses the specific enthalpy and a constant determined by carbon dioxide concentration to calculate air quality satisfaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an amenity index is calculated from a weighted value of carbon dioxide concentration and discomfort index (temperature and humidity), then air quality parameters are measured, but the calculated index cannot evaluate qualitative user satisfaction with air quality
Solution Approach 1:
The patent changes the evaluation parameter from conventional discomfort index to specific enthalpy, which is a thermodynamic parameter that better reflects human thermal comfort. By using specific enthalpy instead of simple temperature and humidity values, the system captures more accurate information about air quality satisfaction. The constant coefficient derived from carbon dioxide concentration further refines this parameter to reflect qualitative user satisfaction.
Solution Approach 2:
The patent introduces a constant coefficient as an intermediary element that links carbon dioxide concentration to the specific enthalpy calculation. This constant acts as a mediator that translates CO2 concentration data into a form that can be integrated with thermal comfort parameters, enabling the quantitative evaluation of qualitative satisfaction information that would otherwise be lost.
2Ease of operation
If conventional air quality metrics are used, then measurement is simple, but they fail to capture user satisfaction with air quality
Solution Approach 1:
The patent transforms the calculation from using multiple separate parameters (temperature, humidity, CO2 concentration as independent factors) to a unified thermodynamic parameter (specific enthalpy) combined with a CO2-derived constant. This parameter change maintains relative calculation simplicity while dramatically improving satisfaction evaluation accuracy, as specific enthalpy inherently integrates temperature and humidity effects in a physically meaningful way.
Data Source
AI summary
A satisfaction calculation device (10) calculates satisfaction with an air quality expressing an air environment of a space. A specific enthalpy calculation unit (110) acquires a temperature and a humidity of the space and calculates a specific enthalpy of the space. An air quality satisfaction calculation unit (120) acquires a carbon dioxide concentration of the space, decides a constant that takes a different value in accordance with the carbon dioxide concentration, and calculates satisfaction with the air quality as an air quality satisfaction (31) by using the specific enthalpy and the constant. The air quality satisfaction calculation unit (120) calculates, as the air quality satisfaction (31), a value obtained by adding a second constant to a value obtained by multiplying the specific enthalpy by a first constant.