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In order to realize the coordination of heating, ventilating and air conditioning and automatic control in the design stage and operation stage, in order to make heating, ventilating and air conditioning and automatic control proceed smoothly in the design and operation, a novel coordination method of heating, ventilating and air conditioning and automatic control in design and operation is propos...Show More
Building climate control including temperature and humidity control by liquid desiccant air conditioning can account for more than 50% of total building energy consumption. Considerable energy savings can be achieved by system optimal design and fully utilizing the capacities of absorbing moisture of liquid desiccant. The paper proposes a novel liquid desiccant air conditioning with batch-wise ope...Show More
The introduction of new technologies and concepts of operation in the air transportation system is not possible unless they can be proven not to adversely affect the system operation under not only nominal but also degraded conditions. In extreme scenarios, degraded operations due to partial or complete technological failures should never endanger system safety. Many past system evolutions, whethe...Show More
The operation mode of ice-storage air-conditioning under partial cold load is studied to calculate the seasonal operation cost and investment-reclaiming period. Compared with traditional economical evaluation method of ice-storage air-conditioning system, a new method is brought forward and the economical ice-storage percentage is studied. The results can be used in related design and study of air...Show More
Recent studies have found that the key to effectively control the spread of the virus is that the hospital ’s purification air conditioning system must meet the requirements of prevention and control. In order to improve the ability of hospitals to prevent and control infectious diseases, hospitals around the country have transformed them. In this paper, the simulation method is used to analyze th...Show More
Due to the increasing air pollution and its harm to the environment caused by industrial activities, daily life and people’s health are threatened seriously. The air cleaner is used to purify air at home. With increasing awareness of environmental problems, people pay attention to the prevention and treatment of air pollution in large-scale indoor areas such as shopping malls, department stores, h...Show More
The development of 5G technology is driving the development of digital industry in China. In order to change the traditional on-site management mode of air-conditioning systems in existing buildings and reduce the maintenance costs of existing buildings. This paper proposes an economical and practical three dimensional visualisation air conditioning management system. The system applies open sourc...Show More
The existing air traffic management for commercial aircrafts has become challenging in the recent past due to the heavy flow of air traffic and with the onset of Urban Air Mobility (UAM) and Urban Air Vehicles (UAV) it’s expected to have a multi-fold increase in the air traffic especially in the low-altitude airspaces. With current latency, and current interfaces, the traditional air traffic manag...Show More
It is almost impossible to secure the reproductibility and stability of a commercial thick-film metal oxide semiconductor gas sensor since it is very difficult to keep the consistency of the manufacturing environment. Thus it is widely known that the general semiconductor-oxide gas sensors are not appropriate for the precise measurement systems. In this paper, the output characteristic analyzer of...Show More
In this paper, the topology of the 12-slot 10-pole hybrid excitation flux switching motor (HEFSM) is proposed firstly. Then, based on the air-gap field modulation theory, the general expressions of air-gap flux density, back electromotive force (EMF), and electromagnetic torque of HEFSM are derived, the working principle of HEFSM is described in detail. Moreover, by combining the Taguchi experimen...Show More
Considering large space and high flow of passenger in high-speed railway station, a new double-layer control scheme is proposed to optimize the normal operation of the air conditioning and shift the peak load for load demand response. According to thermodynamic model of building, multi operation scenarios of comfort type and energy saving type are designed by intraday information scene optimizatio...Show More
In the operation of central AC (air conditioning) systems, the energy consumption of chillers account for a large amount of proportion. Different numbers and capacities of chillers and their auxiliary facilities will lead to different operating energy consumption. A reasonable installation scheme of chillers and their auxiliary facilities is of great significance in reducing the total energy consu...Show More
As the concept of on-demand electric air taxis gains popularity and begins to take shape, many research efforts are underway to address the challenges of integrating this new class of passenger-carrying air vehicles into the already congested U.S. National Airspace System. Through collaborations between the National Aeronautics and Space Administration (NASA), the Federal Aviation Administration, ...Show More
Good indoor air quality (IAQ) can increase human comfort and productivity. An IAQ control method for an air-conditioned room based on a self-adaptive PID control theory is presented. Fuzzy algorithm is adopted in the study to adjust the three parameters of PID controller timely. Accordingly, this adaptive PID controller can be applied to the nonlinear controlled object- indoor CO2 level which is a...Show More
This paper presents a preliminary high-level architecture framework for Air Traffic Management (ATM) Operations in the context of the aviation transportation enterprise. The analysis contained in this paper examines ATM Operations as a specialized case of a logistics process and utilizes key concepts of transportation theory. The analysis used to develop the high-level architecture examines ATM Op...Show More
More and more cities develop rail transit to solve transit difficulties. While the high building and operational cost set back the development. A new multi-function integrated ventilation and air conditioning system has been researched and developed for city rail transit to solve this problem. Combined with the line 5 metro system of Beijing, system function, composition, operation mode has been a...Show More
The purpose of this paper is to study an energy-saving technology based on adaptive temperature threshold for fresh air and air conditioner intelligent switching, in order to provide new ideas and methods for energy-saving management of data centers. By collecting and monitoring environmental parameters such as data center temperature, this technology can determine the adaptive temperature thresho...Show More
Air Traffic Management (ATM) systems represent essential infrastructure that is critical for flight safety. Communication is a key element in the present ATM system. Communication between air traffic controllers and pilots remains a vital part of air traffic control operations, and communication problems can result in hazardous situations. The modern ATM system has independent direct communication...Show More
The optimal operation of heating, ventilation, and air-conditioning (HVAC) systems has been extensively studied to improve energy efficiency in building operation. With the increasing integration of renewable energy sources into power systems, this research has gained additional importance, particularly in addressing the uncertainties in power generation and utilizing HVAC systems as demand respon...Show More
In this paper, an integrated energy system optimization operation strategy that combines ice storage air conditioning and energy storage characteristics of building cooling area is proposed. Firstly, the ice storage air conditioning and the energy storage characteristics of the building cooling area are modeled. Then, an integrated energy system optimization operation model is constructed by consi...Show More
A statistical method of defining rational heat loads on railway air conditioning system with taking into account the current changeable heat loads corresponding to current climatic conditions on the route lines has been proposed. According to this method the rational designed heat load on refrigeration machine, matching current changeable climatic conditions on the route lines and providing effici...Show More
In order to solve the contradiction between the rapid growth of takeoff and landing sorties demand of plateau airport and its limited time slot, it is proposed to evaluate the feasibility of night operation of plateau airport from the perspective of air traffic control to ensure safety. Firstly, it combs 20 risk sources of night operation air traffic control security of plateau airport from the fo...Show More
Urban air mobility (UAM) is considered a promising solution for on-demand air transportation between airports and urban areas. However, an increase in the volume of UAM flights in the vicinity of airports poses challenges to existing aircraft and air traffic control systems. To address this concern, the concept of UAM corridors, defined as three-dimensional airspace volumes, have been proposed. No...Show More
In view of the unclear ability of central air conditioning to participate in demand response, this paper first introduces the process of central air conditioning to participate in demand response, and then analyzes the ETP model of air conditioning. Based on the parameters of the ETP model, the operating state of air conditioning is divided into four operating states: on, off, static temperature s...Show More
The NASA sponsored Hyper-Spectral Communications and Networking for Air Traffic Management (ATM) (HSCNA) project is conducting research to improve the operational efficiency of the future National Airspace System (NAS) through diverse and secure multi-band, multi-mode, and millimeter-wave (mmWave) wireless links. Worldwide growth of air transportation and the coming of unmanned aircraft systems (U...Show More