Humidity Control System Research Articles

Rancang Bangun Sistem Kontrol dan Monitoring Suhu dan Kelembaban Tanah pada Greenhouse berbasis Internet of Thing menggunakan Aplikasi Telegram

The quality of plant growth is significantly influenced by environmental factors, including temperature, air humidity, soil moisture, light intensity, and air quality. Therefore, an agrotechnology approach is required to manage exposure to these environmental factors in accordance with the needs of plant growth processes, which can be achieved through greenhouse technology. To facilitate real-time and remote monitoring and control in the greenhouse farming system, this research involves the design of a temperature and humidity control and monitoring system based on the Internet of Things (IoT). This study employed a NodeMCU ESP8266 microcontroller and a DHT11 sensor to detect the temperature and humidity levels in the greenhouse. The performance test results show that the system works well according to the programming algorithm provided, with an average error rate of 1.2% for the temperature sensor and 1.17% for the humidity sensor. The test results for notification delay time on the Telegram application also meet the standard requirements of Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON), with an average delay value of 0.532882 ms

Advancements in Liquid Desiccant Technologies: A Comprehensive Review of Materials, Systems, and Applications

Desiccant agents (DAs) have drawn much interest from researchers and businesses because they offer a potential method for lowering environmental impact, increasing energy efficiency, and controlling humidity. As a result, they provide a greener option to conventional air conditioning systems. This review thoroughly analyzes current issues, obstacles, and future advancements in liquid desiccant agents (LDAs) for drying, air conditioning, and dehumidification applications. The importance of LDAs in lowering energy use and greenhouse gas emissions is highlighted, emphasizing their potential for environmentally friendly humidity control. The current review examines key parameters such as novel materials, enhancing desiccant qualities, integration with technologies, and long-term durability while examining recent developments in LDAs and investigating their applications in diverse industries. The main conclusions from the evaluated publications in this review are also highlighted, including developments in LDAs, new applications, and developing research fields. Overall, this review advances knowledge of LDAs and their potential to shift humidity control systems toward sustainability and energy efficiency.

Room Temperature and Humidity Control System Using Arduino and Blynk

The temperature and humidity of a room can be a problem that affects the comfort and health of its occupants. Issues such as excessively high or low temperatures and humidity levels can make it difficult for people to sleep and cause discomfort. Various solutions can be implemented, such as using IoT-based temperature and humidity monitoring systems, platform Blynk to optimize temperature and humidity control, and designing control circuits using actuators such as fans with relays. This control system uses the Blynk application to monitor and turn on and off the actuators in this study using a fan. Arduino Wemos D1 as the main processor, and for sensors, DHT22. Test method by placing the system in a room with an area of 3 x 3 m. The results of the test with the fastest average time were in the morning with a time of 10 minutes, 52 seconds. The longest average time was obtained during the day, with a test time of 14 minutes, 38 seconds. The difference in error between the system and the comparison is the highest at a temperature of 2.71% and at a humidity of 33.5%.

Sistem Kendali Dan Monitoring Penyiram Tanaman Cabai Menggunakan Metode Fuzzy Dengan Aplikasi Telegram

The need for the staple food chili is quite high, while agricultural land in big cities is being converted into residential areas. Meanwhile, chili plants can grow and develop in a limited environment by controlling humidity, temperature and light intensity. This research aims to analyze a greenhouse monitoring control system for chili plants based on DHT 22 temperature sensor input and YL-69 humidity sensor. The method used is fuzzy mamdani to control humidity according to what the plants need. The system test results can maintain the soil moisture of chili plants at 60% - 80%. The DHT 22 sensor test worked quite well with a error temperature sensor of 0.00% - 1.12%. Overall, the temperature and humidity control system in the greenhouse can maintain stable humidity for chili plants at the desired set point.

Temperature and Humidity Control System for 20 kV of Cubicle with Multiple Input Multiple Output Fuzzy Logic Controller

Cubicle 20 kV is a crucial electrical equipment in the 20 kV power distribution system. Often, cubicle issues arise due to excessively low or high temperatures and humidity, which can lead to the presence of water spots and corrosion on the components inside the 20 kV cubicle. One of the efforts to maintain the reliability of this 20 kV cubicle is to ensure that the temperature and humidity inside the cubicle remain within their operational limits. To achieve this, a system is needed to control the temperature and humidity in the 20 kV cubicle. The system can monitor and control the temperature and humidity inside the cubicle by adjusting the activation angle of the exhaust fan and heater. Control is achieved using a multiple-input, multiple-output fuzzy logic controller. The main components of this system are the STM32 microcontroller, DHT22 sensor, and ESP8266 module for monitoring temperature and humidity via a website. System has successfully controlled temperature and humidity d with a set point value of 35 °C and humidity of 60% RH. This implementation of fuzzy multiple input multiple outputs has performed well and resulted in only a small error of 0.55% for temperature and 1.05% for humidity.With the presence of this device, the temperature and humidity in the cubicle 20 kV can be controlled, and it enables the PLN operator to easily monitor and maintain the cubicle 20 kV.

Application case and circuit design optimization of temperature and humidity control system by using Internet of Things

Application case and circuit design optimization of temperature and humidity control system by using Internet of Things

Moisture Adsorption-Desorption Behaviour in Nanocomposite Copolymer Films.

Dehumidifying air via refrigerant cooling method consumes a tremendous amount of energy. Independent humidity control systems using desiccants have been introduced to improve energy efficiency. This research aimed to find an alternative to the commonly used solid desiccant, silica gel, which has weak physical adsorption properties. It also aimed to overcome the limitation of liquid desiccants that may affect indoor air quality and cause corrosion. This study reports on the synthesis of poly(vinyl alcohol-co-acrylic acid), P(VA-AA), through solution polymerisation by hydrolysing poly(vinyl acetate-co-acrylic acid), P(VAc-AA). This viable copolymer was then incorporated with graphene oxide (GO) at different concentrations (0 wt.%, 0.5 wt.%, 2 wt.% and 5 wt.%) to enhance the adsorption-desorption process. The samples were tested for their ability to adsorb moisture at different levels of relative humidity (RH) and their capability to maintain optimum sorption capacity over 10 repeated cycles. The nanocomposite film with 2% GO, P(VA-AA)/GO2, exhibited the highest moisture sorption capacity of 0.2449 g/g for 60-90% RH at 298.15 K, compared to its pristine copolymer, which could only adsorb 0.0150 g/g moisture. The nanocomposite desiccant demonstrated stable cycling stability and superior desorption in the temperature range of 318.15-338.15 K, with up to 88% moisture desorption.

The application of wireless sensor technology in gymnasium temperature and humidity control system

The main objective of this study on temperature and humidity control in indoor sports halls is to provide an environment that is suitable for the people exercising in the halls and a way to minimize unnecessary sports injuries. The research methods used in this paper are both field monitoring of the environment and online data collection. The paper concludes with a temperature and humidity monitoring network based on a wireless sensor network to detect environmental temperature and humidity and thus achieve a system that can regulate it.

Coupled heat and humidity control system of narrow-trough solar collector and solid desiccant in Chinese solar greenhouse: Analysis of optical / thermal characteristics and experimental study

Coupled heat and humidity control system of narrow-trough solar collector and solid desiccant in Chinese solar greenhouse: Analysis of optical / thermal characteristics and experimental study

Numerical Study on the Heating Effect of a Spring-Loaded Actuator—Part II: Optimization Design of Heater Parameters

Unfavorable temperatures and humidity will cause the failure of spring actuators. In order to ensure the safe operation of the actuator, it is necessary to optimize the design of the built-in heater system of the actuator itself. In this study, an experimental design and a response surface model were used to fit the empirical formulas for the minimum temperature, maximum humidity, and maximum temperature on the heater surface. On this basis, a genetic algorithm was used to establish the optimal size of the heater in the chamber of the spring actuator. The study results show that the air inside the actuator shows a trend of a decrease in temperature and an increase in relative humidity from top to bottom. The empirical equation obtained by fitting the second-order response surface model has high accuracy, and the maximum prediction errors for the minimum temperature, maximum relative humidity, and maximum temperature of the heater surface of the spring actuator are −0.5%, 11.7%, and 4.7%, respectively. When the environmental temperature reduces from 313 K to 233 K, the optimal heating power of the heater increases from 10 W to 490 W, the optimal relative length increases from 3.57 to 6, and the optimal relative width increases from 1 to 5.3. Therefore, the study can act as a reference for the temperature and humidity control system of future actuators.

Design of Ideal Air Condition Control Inside 20 kV Cubicle for Lokomboro Micro Hydro Power Plant in Sumba Indonesia

Corona, which is a phenomenon that occurs when the air around the conductor is ionized can occur in a 20 kV cubicle and damage the equipment. To prevent this occurrence, the air condition inside the cubicle need to be controlled at a safe level. In this study, we maintain an ideal air condition with Arduino-based humidity and temperature control system using ATMEGA328 microcontroller. This system was installed in the 20 kV cubicle at Lokomboro Micro Hydro Power Plant and then tested for performance. From the test result it was found that the system was able to control the humidity and temperature inside the cubicle at 45 % and 26 0C, respectively. By controlling humidity and temperature values at ideal condition, the corona appearance that damage the equipment has been prevented. This installation showed operational, financial, and company image benefit for PT. PLN since it has prevented loss due to damage of equipment and also maintained electrical power reliability.

Temperature and Humidity Control System with Air Conditioner Based on Fuzzy Logic and Internet of Things

Work is an activity that takes most of the day to earn a living and improve the standard of living. During work, many people have to work indoors, which can be a less comfortable and unhealthy place if the temperature and humidity are not well controlled. Unsuitable temperature and humidity conditions can negatively affect the health and comfort of workers, as well as interfere with productivity and work quality. However, the problem that often arises is the difficulty of controlling room temperature and humidity effectively, especially in rooms that are closed and do not get air circulation from outside. Therefore, an effective solution is needed to control the temperature and humidity of the room automatically and remotely via the internet. The contribution of this research is to develop an effective and efficient AC control system in controlling room temperature and humidity using Tsukamoto's Fuzzy Inference System (FIS) method and the Internet of Things (IoT). Tsukamoto's FIS is used to produce AC temperature values in room temperature and humidity control as measured by the DHT22 sensor directly integrated with the ESP32 microcontroller. This control system is monitored remotely using IoT concepts through a mobile application interface. The results of this study show that room temperature can be controlled under normal conditions, with an average change of -1.67°C and an overall average temperature of 25.95°C. While the average humidity is at a value of 80.16% which is included in the Wet set. This suggests that humidity cannot be controlled under normal conditions, so it still requires further development. In addition, it is also necessary to further investigate the effectiveness of the tool in various sizes and more complex layouts of rooms.

RANCANG BANGUN SMART GREENHOUSE UNTUK BUDIDAYA TANAMAN SAWI PAKCOY (brassica rapa subsp) BERBASIS ANDROID

Due to rising market demand, green mustard cultivation is still being developed. A soil temperature and humidity control system based on the Arduino Uno microcontroller will be designed and tested in this study, as will an automatic plant watering system for this control. The part for recognizing temperature and mugginess utilized is the DHT22 sensor with a result as a computerized signal and has 4 pins comprising of a power supply, information sign, invalid and ground. This study employed engineering design for the production of the automation system. The study produced a smart greenhouse that is capable of remotely controlling microcontroller equipment and monitoring devices like sensors and can regulate, adjust, and modify the climate to optimize the conditions and processes of plant growth in the greenhouse.

Thermal and Humidity Control System in Interior as Climate Responsive Design (Case Study: Rectorate Building of Widya Mandira University in Kupang, East Nusa Tenggara)

Design of an interior space is user centered. The controlled thermal and humidity of a room by a data according to standards can meet the needs and comfort of users. The interior of the room is designed as a response to the environmental conditions in which the room designed. The study was conducted to examine how the implementation of thermal and humidity control system in the interior can maximize the comfort aspect of the user. Descriptive qualitative method with an experimental approach used in the study. Data was collected through previous literacy studies and field visit of object of study case, which is Rectorate Building of Widya Mandira University in Kupang, East Nusa Tenggara. This research aims to indicate how an implementation of system in interior design can be an answer to the state of the surrounding environment and becomes a climate responsive design. The results of this study can be used as future approach of smart building in responsive climate design.

Photoaging of Typical Microplastics as Affected by Air Humidity: Mechanistic Insights into the Important Role of Water Molecules.

Recent studies showed that land is the most important sink for microplastics (MPs); however, limited information is available on the photoaging processes of land surface MPs that are exposed to the air. Herein, this study developed two in situ spectroscopic methods to systematically explore the effect of air humidity on MP photoaging using a microscope of Fourier transform infrared spectroscopy and a laser Raman microscope, which were equipped with a humidity control system. Polyethylene microplastics, polystyrene microplastics, and poly(vinyl chloride) microplastics (PVC-MPs) were used as model MPs. Our results showed that relative humidity (RH) could significantly influence the MP surface oxygen-containing moieties generated from photo-oxidation, especially for PVC-MPs. As the RH level varied from 10 to 90%, a decrease in the photogenerated carbonyl group and an increase in the hydroxyl group were observed. This could be attributed to the involvement of water molecules in the production of hydroxyl groups, which subsequently inhibited carbonyl generation. Moreover, the adsorption of coexisting contaminants (i.e., tetracycline) on photoaged MPs exhibited strong RH dependence, which could be assigned to the varied hydrogen bonding between tetracycline carbonyls and aged MP surface hydroxyls. This study reveals a ubiquitous but previously overlooked MP aging route, which may account for the changed MP surface physiochemical properties under solar irradiation.

Thermodynamic performance analysis of a novel air conditioning system integrating solar absorption compression refrigeration and vacuum membrane-based dehumidification (SACV)

For solar absorption cooling systems, it is difficult to generate lower chilled water for dehumidifying and cooling, as well as facing intermittency problems. In this work, the novel SACV system for indoor temperature and humidity control is proposed, which integrates the SSAR subsystem, the VCR subsystem, and the VMD subsystem. The VMD subsystem and the VCR subsystem solve the dehumidification difficulty and all-weather heating and cooling problems, respectively. This work also proposes a method for determining the collector area that avoids frequent start-ups and shutdowns of the VCR subsystem. Besides, a thermodynamic model of the SACV system is established and validated, and a systematical performance analysis of the SACV system is carried out. For the SACV system, the sensitivity of the parameters to the MCOP is also discussed. Results indicate that the outdoor air temperature, the latent heat load ratio, and the solar radiation intensity are the key parameters for designing the SACV system; further, the evaporation temperature and the permeate side pressure are the key parameters for the SACV system optimization. The SACV system is more suitable for high-humidity environments. Moreover, during the cooling season, the SACV system of a commercial building can realize a power saving rate of 39.82% compared to the conventional VCR system. The proposed SACV system of a commercial building can reduce 19653.59 kg/year carbon emission compared to the conventional VCR system in Nanjing. The carbon reduction rate of the SACV system in the selected cities is rather similar, about 36.78%–39.79%.

IoT Based Humidity and Temperature Control System for Smart Warehouse

In daily life, vitamins fruits and vegetables play a very important role in human life. The farmer produces grains or vegetables in huge quantities. Due to lack of storage problem farmer suffers. It is necessary to store all these things in a special warehouse. Thus, improper storage of grains or fruits is essential to meet the increasing demands. Storage time and fruit quality are greatly influenced by storage environmental factors. Therefore, it is important for the fruit storage environment to perform multi-parameter monitoring and analyze the collected parameters and then regulate and control. The quality of grains and other perishable goods kept in a warehouse usually deteriorates due to lack of monitoring and proper maintenance of their required suitable conditions in such a large area. The proposed methodology deals with the storage of grains, fruits, etc., and to identify their temperature and humidity patterns so that they will not be degraded. Establishing the environment in relation to the nature of the crop so as to determine an optimum threshold with an appropriate pattern of monitoring and change. The main goal of this research article is to provide solutions to prevent rotting of grains and fruits in the storage area.

Seasonal differences in intestinal flora are related to rats' intestinal water metabolism.

Many studies have reported obvious seasonal differences in the intestinal flora of rats, and this stable distribution of the seasonal flora helps in maintaining the normal physiological function of the host. However, the mechanism underlying these seasonal differences in intestinal flora remains unclear. To explore the correlation among seasonal factors and intestinal water metabolism and intestinal flora, 20 Sprague Dawley (SD) rats were divided into spring, summer, autumn, and winter groups. The environment for the four seasons was simulated using the Balanced Temperature and Humidity Control system. The intestinal water metabolism was evaluated by determining the intestinal transmission function, fecal water content, water content of colonic tissue, and the colonic expression levels of AQP3, AQP4, and AQP8. The composition and relative abundance of intestinal microflora in rats in each season were assessed through 16S rDNA amplifier sequencing, and the relationship between the dominant flora and intestinal water metabolism in each season was analyzed using Spearman correlation analysis. The high temperature and humidity season could lead to an increase in intestinal water metabolism and intestinal water content in rats, whereas the low temperature and humidity season could lead to a decrease, which was closely related to the change in microflora. To explore the molecular mechanism of seasonal changes in intestinal water metabolism, the concentration of colonic 5-HT, VIP, cAMP, and PKA associated with intestinal water metabolism in rats were also examined. Seasonal changes could affect the concentration of colonic 5-HT and VIP in rats, and then regulate AQPs through cAMP/PKA pathway to affect the intestinal water metabolism. These results suggest that seasonal factors affect the level of intestinal water metabolism in rats and result in seasonal differences in intestinal flora.

Pet Temperature, Humidity, and Light Control System Design Based on Single Chip Microcomputer

It is a domestic demand nowadays that people have a pet, plants, and kids or elders at home that must look after on. Sometimes, it is hard to tell if they are living in an appropriate environment where they feel comfortable. That would be troublesome when people go to work or have a vacation, leaving them at home alone. Also, some of the aspects are subjective and difficult to quantify, especially humidity and temperature. In order to reflect the surrounding environment accurately and intuitively, a pet-sitter system is implemented. In this design, the use of high reliability of the Microprogrammed Control Unit (MCU) as the processing core, to improve the pet environment of temperature and humidity, and light to achieve the function of the sub-function design. The main functions of the design include the collection, display, automatic control, and adjustment of temperature and humidity illumination. For the selection of equipment, with the goal of running stability and cost performance, the corresponding equipment is selected, and the final realization of temperature, humidity, and light regulation.

SG-APSIC1110: Project quality development of zero stock

Objectives: Many medical devices and equipment have been reserved in hospital wards and outpatient departments. Among these items, >80% are not often used but are being reserved for emergency situations. We aimed to reduce the number of unnecessarily reserved medical devices and to reduce the cost of unnecessary resterilization of devices and equipment. Methods: The central sterile supply department (CSSD), in coordination with other 13 wards within the Thammasat University Hospital, established a standard action plan for improving the efficiency of medical supply stocking and storage. Medical equipment and/or devices were returned to the CSSD, which acted as the center of management and distribution. The CSSD also tracked and solved problems that occurred and reevaluated practice guidelines. User satisfaction was evaluated and statistic data were collected and analyzed. Results: Wards no longer reserve medical equipment. Thus, no repeated sterilization was needed for unused medical equipment from the participated 13 wards, and sufficient medical equipment was available for various wards when needed. This project helped reduce the cost of purchasing medical equipment, especially for a newly opened ward. The storage of all medical equipment and devices complied with the practice guidelines because the CSSD storage room had a standard temperature and humidity control system. Conclusions: In this project, the CSSD cooperated with the 13 participating wards. As the result of centralizing the supplies, the CSSD has sufficient medical equipment and devices for all other wards, including a newly opened ward. The hospital benefitted from reduced costs of purchasing new medical equipment for a newly opened ward as well as the cost savings of eliminating unnecessary resterilization of unused devices and equipment.