Abstract
The aim of the paper is to assemble a simulator for evaluation of thermal comfort in car cabins in order to give a feedback to the HVAC (heating, ventilation and air conditioning) system. The HW (hardware) part of simulator is formed by thermal manikin Newton and RH (relative humidity), velocity and temperature probes. The SW (software) part consists of the Thermal Comfort Analyser (using ISO 14505-2) and Virtual Testing Stand of Car Cabin defining the heat loads of car cabin. Simulator can provide recommendation for the climate control how to improve thermal comfort in cabin by distribution and directing of air flow, and also by amount of ventilation power to keep optimal temperature inside a cabin. The methods of evaluation of thermal comfort were verified by tests with 10 test subjects for summer (summer clothing, ambient air temperature 30 °C, HVAC setup: +24 °C auto) and winter conditions (winter clothing, ambient air temperature -5 °C, HVAC setup: +18 °C auto). The tests confirmed the validity of the thermal comfort evaluation using the thermal manikin and ISO 14505-2.
Highlights
The issue of thermal comfort in cars is still relevant especially in the context of energy savings
This paper refers to assembly a simulator with integrated hardware and software (TCA, VTSCC) for prediction of thermal comfort to provide feedback to the climate control system
The advantage of thermal manikin compared to the sensors of EHT is that it follows the shape of the human body, that influences the air flow around the measured point and the heated surfaces generate similar plumes as real human
Summary
The issue of thermal comfort in cars is still relevant especially in the context of energy savings. To achieve thermal comfort with less energy demands is possible by improving the used materials (glazing, car painting, etc.) HVAC (heating, ventilation and air conditioning) technologies and car climate control systems. This paper refers to assembly a simulator with integrated hardware (thermal manikin Newton with probes) and software (TCA, VTSCC) for prediction of thermal comfort to provide feedback to the climate control system. The main feature of simulator is evaluation of effect of clothing on thermal comfort using thermal manikin [1] or at least sensors of equivalent temperature [2]. The advantage of thermal manikin compared to the sensors of EHT is that it follows the shape of the human body, that influences the air flow around the measured point and the heated surfaces generate similar plumes as real human. Thermal manikins can be used to evaluate new strategies of cabin ventilation, which is currently widely studied, for electric vehicles, where air-conditioning (A/C) system can significantly impact their performance, and for self-driving vehicles, etc
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