Thermal comfort and indoor air quality control system for thailand climate condition via internet network

Name: Dararat Tongdee

keyword: Monitoring control

; Thermal comfort

; Indoor air quality

; Thermoelectric module

; Composite desiccant unit

Abstract: This research was to develop and optimize the specially designed air ventilation system by using a monitoring control system. The proposed ventilation unit was designed and created based on the dedicated outdoor air system for substitution of conventional air ventilation. The thermoelectric (TEC1-12708) modules and composite desiccant unit were used to improve the number of loads of outdoor inlet air before being supplied to indoor. The monitoring control system was written in the Arduino program for controlling the indoor parameters such as humidity and temperature under ASHRAE 62.2 standards. Furthermore, the indoor data was monitored and analyzed on ThingSpeak Internet of Things (IoT) platform. The data from sensors were kept on ThingSpeak cloud storage. This experiment was divided into 4 main parts: the experimental design, the monitoring control system, the air ventilation process, and experimental setup aims to evaluate the thermal comfort and indoor air quality (IAQ), the optimization of the proposed system, COP of the system, the total heat exchange of air, the outdoor air improvement, as well as the performance of regeneration and dehumidification process. The results indicated that the proposed ventilation unit can provide the lowest temperature and relative humidity of cold-side outlet air approximately 27°C and 55%, respectively when 12 V of input voltage to thermoelectric modules was applied. In the part of total heat exchange, the 9 V of electrical supply provides the maximum enthalpy difference between cold-side inlet air state and cold-side outlet air state about 11.8 kJ/kg when compared to other input voltages to thermoelectric modules. Furthermore, the 12 V also provided the maximum of moisture removal regeneration (MRR) and regeneration effectiveness (Eᵣₑg) due to the maximum temperature of hot-side thermoelectric modules. However, the 9 V of electrical voltage can save more energy than the 12 V and offers a good IAQ and thermal comfort at the same time.

NARESUAN UNIVERSITY. NARESUAN UNIVERSITY LIBRARY

Address: PHITSANULOK

Email: library@nu.ac.th

Name: Somchai Maneewan

Role: Advisor

Created: 2022

Modified: 2026-03-15

Issued: 2026-03-15

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Doctor of Philosophy

Level: Doctor's degree

Descipline: Applied Physics

Grantor: Naresuan University

©copyrights Naresuan University

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