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Compact Sensors for Evaluation the Thermal Comfort
Kazkaz, Mohammad ; Fiľakovský, Karol (oponent) ; Šafařík,, Pavel (oponent) ; Pavelek, Milan (vedoucí práce)
The air temperature is most often used to assess the thermal state of an internal environment. However, air temperature alone is insufficient in many cases to evaluate the environmental thermal state. The main objective of the thesis is evaluating the thermal state of an indoor environment and specifying the parameters that influence on it. Air temperature, mean radiant temperature, air velocity, and humidity are the four fundamental environmental parameters that determine the thermal state of an interior environment. Given that the thermal state of an environment depends on many parameters, so it has been derived quantities which include the combined effect of several or all these parameters to determining the thermal state of the environment. Some of these quantities for example are: Effective temperature, globe temperature (temperature measured by globe thermometer), operative temperature, equivalent temperature, PMV and PPD indices… etc. Nowadays there are a lot of high accuracy sensors which can evaluate the environmental thermal state, and due to their high price, they are primarily used for purpose of research. The presented work is focused mainly on development of a compact plate sensor for evaluating the thermal state of an interior environment. Mainly focus was on the low cost of the sensor together with a sufficient accuracy. To achieve the objective of the thesis, the following proceedings were carried out: • Analysis the environmental factors affect the thermal state of an environment. • Study the impact of the air temperature, mean radiant temperature, and air velocity on thermal indexes, the globe temperature and operative temperature. • The theoretical comparison between globe temperature and operative temperature. • Design, developing, and constructing a new plate sensor for assessment the thermal state of an interior environment. • Design and constructing a testing chamber to make comparison between sensors of the thermal state of an environment. • Calibrating the constructed sensor by measuring the physical quantities characterizing the thermal state of the environment. • Test the developed plate sensor and comparing it with the globe thermometer in test chamber. • Make a comparison between the theoretical solutions and the measurements in test chamber. The results of this work are own theoretical comparison between the globe temperature and the operative temperature in the selected range of mean radiant temperature, air velocity, and air temperature for evaluating the thermal state of an internal environment. The main output of this work is designing and constructing a simple plate sensor, which would be accurate enough to measure the thermal state of the internal environment. Further, the testing chamber has been constructed to test the developed sensor using new measuring system INNOVA.
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Compact Sensors for Evaluation the Thermal Comfort
Kazkaz, Mohammad ; Fiľakovský, Karol (oponent) ; Šafařík,, Pavel (oponent) ; Pavelek, Milan (vedoucí práce)
The air temperature is most often used to assess the thermal state of an internal environment. However, air temperature alone is insufficient in many cases to evaluate the environmental thermal state. The main objective of the thesis is evaluating the thermal state of an indoor environment and specifying the parameters that influence on it. Air temperature, mean radiant temperature, air velocity, and humidity are the four fundamental environmental parameters that determine the thermal state of an interior environment. Given that the thermal state of an environment depends on many parameters, so it has been derived quantities which include the combined effect of several or all these parameters to determining the thermal state of the environment. Some of these quantities for example are: Effective temperature, globe temperature (temperature measured by globe thermometer), operative temperature, equivalent temperature, PMV and PPD indices… etc. Nowadays there are a lot of high accuracy sensors which can evaluate the environmental thermal state, and due to their high price, they are primarily used for purpose of research. The presented work is focused mainly on development of a compact plate sensor for evaluating the thermal state of an interior environment. Mainly focus was on the low cost of the sensor together with a sufficient accuracy. To achieve the objective of the thesis, the following proceedings were carried out: • Analysis the environmental factors affect the thermal state of an environment. • Study the impact of the air temperature, mean radiant temperature, and air velocity on thermal indexes, the globe temperature and operative temperature. • The theoretical comparison between globe temperature and operative temperature. • Design, developing, and constructing a new plate sensor for assessment the thermal state of an interior environment. • Design and constructing a testing chamber to make comparison between sensors of the thermal state of an environment. • Calibrating the constructed sensor by measuring the physical quantities characterizing the thermal state of the environment. • Test the developed plate sensor and comparing it with the globe thermometer in test chamber. • Make a comparison between the theoretical solutions and the measurements in test chamber. The results of this work are own theoretical comparison between the globe temperature and the operative temperature in the selected range of mean radiant temperature, air velocity, and air temperature for evaluating the thermal state of an internal environment. The main output of this work is designing and constructing a simple plate sensor, which would be accurate enough to measure the thermal state of the internal environment. Further, the testing chamber has been constructed to test the developed sensor using new measuring system INNOVA.
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