Taking these requirements into account, the thic temperature and humidity independent control airconditioning system is generally considered to be a possible and effective solution. This book presents the main components of the thic systems, including dehumidification devices, hightemperature. Temperature and humidity independent control thic of air. Experimental investigation on a novel temperature and. The application analysis of temperature and humidity.
Temperature zoning for hvac systems, independent room control. This book presents the main components of the thic systems, including dehumidification devices, hightemperature cooling devices and. Mechanical humidity controllers provide automatic control of humidifiers and dehumidifiers or ventilators in central heating and air conditioning systems. There are two independent systems to control the temperature and the humidity. Although caloricbased technologies show great potential for energy savings, they are still far from being practically applied11. Air conditioning system can divided into two major types. Outside air temperaturehumidity sensor hvac control. The fresh air affords the indoor excessive humidity, so the system can satisfy the need of the vary heat humidity ratio and deal with the problem of the routine air conditioner system, which can not. Florida power and light recommends this humidity control method and schedule. Controlling the humidity with your air conditioner. In this paper, a novel thic system was experimentally investigated, which consisted of a solid desiccant heat pump sdhp to handle the latent load and a variable refrigerant flow vrf air. Compared to the conventional system, energy efficiency ratio for the entire airconditioning season of temperature and humidity independent control system i using condensing dehumidification is about 10% higher if the dry fan coil unit is adopted. Decentralized temperature fuzzy logic control of a passive air conditioning unit r. Air conditioning system essential for both pressurized and unpressurised aircraft.
Once you have connected your temperature control device air conditioner, fan, etc. The indoor requirements in terms of heat and moisture extraction. When activated using the remote control, the air conditioner unit will raise the set temperature in steps after a period of time. Development of temperature and humidity independent. System air conditioning laboratory, lg electronics, 32723, gasandong, geumcheongu, seoul, 153802, republic of korea. Airconditioning system individually controlled temperature and humidity 1. Comfortable, efficient and affordable heating, ventilation and air conditioning hvac systems in buildings. To solve this problem, innovative system designs such as temperature and humidity independent control. You have more control of the temperatures in each zoned area or room. Thermometrics temperature sensors for measurement and. Absolute and relative humidity precise and comfort air. In both comfort and process applications, the objective may be to not only control temperature, but also humidity, air quality, and air movement from space to space.
The basic idea of the thic system is to regulate indoor temperature and humidity separately. Air conditioning system control temperature and humidity. Outside air temperaturehumidity sensor the outside air temperature sensor uses a thermistor to read the outside temperature. In recent years, ldbased thic airconditioning systems have gained much attention and have been researched by experiments and simulations. Humidity in room air is not only because of ambient air. Review of temperature and humidity control technology for heat pump and air conditioning systems. A system control module receives this temperature reading and uses a control loop to control the overall system temperature. Temperature and humidity independent control system thic has become a research focus for its merits of energy saving and improved indoor thermal comfort. Field performance of this system was tested and compared with widely adopted joint hrv and vrf system under heating condition. This sensor also senses humidity using a humidity transducer.
Most air conditioner controllers have the builtin economy or sleep mode function. And authors summarized the application status, design conditions and application conditions of thic airconditioning system. Read performance of temperature and humidity independent control airconditioning system in an office building, energy and buildings on deepdyve, the largest online rental service for scholarly research with thousands. The term hvac temperature zoning is used when each room, section, or floor is individually controlled by a separate thermostat for the same hvac system. The ldbased airconditioning system is demonstrated energysuperiority over the conventional vapor compression system by allowing temperature and humidity to be controlled independently 3,4. The basic principle of the thic temperature and humidity independent control airconditioning system is proposed in this chapter. These two thic systems were configured according to the indoor occupancy and fresh air demand. Design guide for heating, ventilating, and air conditioning systems. Air innovations specializes in the design and development of selfcontained and remote packaged cooling systems for the precise control of temperature, humidity, and filtration. The flow, temperature and relative humidity are set to the desired level using direct reading dial potentiometers. Decentralized temperature fuzzy logic control of a passive. Comfortable, highefficiency heat pump with desiccant. Temperature and humidity independent control thic airconditioning systems, which consist of temperature control and humidity control subsystems, were first developed in china.
How air conditioning works to maintain comfort condtions. The process of controlling temperature, humidity, air flow rate, and air cleanliness inside a room through the use of air conditioning is explained in this article. Mathematical model of controlled temperature and humidity of air conditioning system. Air conditioner controllers air conditioning systems. Smart sensors enable smart air conditioning control mdpi. The inner and outer factors impacting the train airconditioning. In this paper, the working principle, relevant equipments and characteristics of temperature and humidity independent control thic airconditioning system were presented. This is because the required cooling will reduce when one sleeps. Background airconditioning systems utilizing vapor compression heat pump cycles have seen energy efficiency improvements through reductions in required compressor operation. Building environment analysis based on temperature and. Controlling these variables thus means managing the. For other three cities in china, the energy saving ratio of temperature and humidity independent control system i is about 10%, about 15%17% of temperature and.
It is also because of internal latent heat emitters such as gas burners, people, steam generating equipment, permeated moisture from walls, roof and floor, etc. Temperature and humidity independent control thic of airconditioning system focuses on temperature and humidity independent control thic systems, which represents a new concept and new approach for indoor environmental control. Industrial air conditioning systems doas solutions munters. Based on customers specific needs and requirements, modules are added to provide full climate control, controlling both temperature and humidity. Usually, cabin temperature is maintained between 15 and 30 degree celsius. You can have an effective humidity control in the existing hvac system by following the belowmentioned tips 1. Performance comparison of temperature and humidity. This book presents the main components of the thic systems, including dehumidification devices, high temperature. Air conditioning solutions for the steel and metals processing industry hdt global 30500 aurora road suite 100. So while relative humidity drops when temperature goes up in a data. Through the research of the system application at home and.
Since you have set the air conditioning system to only operate for 2 hours per day your monthly energy cost can be calculated. When your air conditioning is working properly and running efficiently, you can expect it to help control both your inside temperature and humidity. Request pdf temperature and humidity independent control thic of. Manufactures often require the ability to control temperature and humidity independently munters air treatment systems are designed to costeffectively provide humidity control on an asneeded basis, whilst maintaining desired operating and supply temperatures. Comfortable and highefficient desiccantenhanced direct expansion. The intended use of the conditioned space is the determining factor for maintaining the temperature, humidity, air movement, and. Research of temperature and humidity independent control. High temperature cooling and low temperature heating in buildings. Control of room temperature and humidity is very important for people to live a comfortable life. Also, the controlling of hvac heating, ventilation, and air conditioning system is far from the building occupants, since if they wish to, they should ask the janitors who has accessibility to the control of the hvac system to adjust the temperature or.
The temperature and humidity readings are collected by. A wide variety of constant temperature and humidity air conditioner options are available to you, such as certification. Effect of refrigerant charge, compressor speed and air. Review of temperature and humidity control technology for. This humidity and the mid 90s temperatures will combine to make it uncomfortable outside and just as uncomfortable inside if your air conditioning system is not working correctly. This book presents the main components of the thic systems, including dehumidification devices, high temperature cooling devices and indoor terminal devices.
This allows you to control the temperature and humidity independently. This schedule maintains good control of your relative humidity and is a recommendation from the local power companies. Selects a typical office building located in beijing as the analysis object. The process air conditioning system must ensure that defined air conditions. The building annual hourly cooling and moisture loads were calculated by dest. In hot weather, air conditioning can prevent heat stroke, dehydration from excessive sweating and other problems related to hyperthermia. Performance of a temperature and humidity independent. The innovative thic airconditioning systems are introduced in this chapter. Air conditioning system control temperature and humidity in cabin. Scientists have found that humans feel most comfortable at temperatures around 25 degree celsius and humidity of 50% with certain flow rates of air. The temperature and humidity independent control thic system, which controls indoor temperature and moisture separately, may be an attractive alternative to existing conventional hvac systems for its prominent improvement on the overall system performance and utilization of low grade energy resources. Thermometrics inline flowthrough temperature sensors monitor the temperature of a fluid that passes through it.
A thic system usually consists of a thermally driven dehumidification unit for example, a. Hdc1010 low power, high accuracy digital humidity sensor. Modeling validation and control analysis for controlled. Air conditioning is the simultaneous control of temperature, humidity, air movement, and the quality of air in a conditioned space or building. Environmental process control systems air innovations. Temperature and humidityindependent control or desiccant systems have been proposed to overcome these challenges. We design and build air conditioning and humidity control units to withstand the extreme conditions. Performance of temperature and humidity independent. In this study, a novel temperature and humidity independent control system, the joint sdhp and vrf system was introduced.
Figure 1 shows that, under the control of chilled water coil, heater, and humidifier of the controlled temperature and humidity air conditioning system, the airconditioned zone is provided with appropriate energy to keep its temperature and humidity corresponding to the set conditions. Temperature and humidity independent control air conditioning system thic which. Dedicated air conditioning system with independent controls should be provided for. This could be engine temperature, heater temperature, industrial supply temperature, etc. The outdoor air design temperature for heating calculations should be obtained from the project. Clean the coils this is the easiest thing to try first for getting better hvac humidity control from your older system. Portable temperature and humidity control products such as heaters, fans, evaporative coolers, humidifiers, temperature gauges and dehumidifiers are not only best for making your hvac system more efficient, but they are absolutely necessary when there is no central heating and cooling system or climate control devices in the house. Air2 has the same features as the air1 with the exception of separate temperature and humidity outlets. Our core strength is our ability to understand technical environmental requirements, constraints, and goals, and then to transform those elements into a packaged.
591 1046 980 264 1236 1102 1330 389 583 692 21 1364 438 231 28 1246 401 987 1213 1416 1462 587 522 424 1102 1400 621 1195 1411 348 1234 276 1615 611 1463 488 676 425 1010 302 1037 1007 276 755 228 779 517