Topic
Environmental control system
About: Environmental control system is a research topic. Over the lifetime, 620 publications have been published within this topic receiving 9137 citations. The topic is also known as: ECS.
Papers published on a yearly basis
1 / 2
Papers
4 May 2015
TL;DR: In this paper, the authors provide an in-depth look into how the systems have or will be changed in the future of electric aircraft, including electric taxi and gas-electric propulsion for aircraft.
Abstract: Similar to the efforts to move toward electric vehicles, much research has focused on the idea of a more electric aircraft (MEA). The motivations for this research are similar to that for vehicles and include goals to reduce emissions and decrease fuel consumption. In traditional aircraft, multiple systems may use one type or a combination of types of energy, including electrical, hydraulic, mechanical, and pneumatic energy. However, all energy types have different drawbacks, including the sacrifice of total engine efficiency in the process of harvesting a particular energy, as with hydraulic and pneumatic systems. The goal for future aircraft is to replace most of the major systems currently utilizing nonelectric power, such as environmental controls and engine start, with new electrical systems to improve a variety of aircraft characteristics, such as efficiency, emissions, reliability, and maintenance costs. This paper provides an in-depth look into how the systems have—or will be—changed. Future aircraft capabilities such as electric taxi and gas–electric propulsion for aircraft are also included for discussion. Most recent commercial transport aircrafts are described as the current state-of-the-art electric aircraft system. Future goals, including those of NASA, are presented for future advances in MEA.
1,115 citations
Patent•
22 Oct 2003
TL;DR: In this article, an aircraft system architecture for providing secondary power to an environmental control system includes an electric generator operably coupled to a jet engine, and the generator can provide outside air to a passenger cabin of the aircraft in the absence of bleed air from the jet engine.
Abstract: Methods and systems for providing secondary power to aircraft systems. In one embodiment, an aircraft system architecture for providing power to an environmental control system includes an electric generator operably coupled to a jet engine. The jet engine can be configured to provide propulsive thrust to the aircraft, and the electric generator can be configured to receive shaft power from the jet engine. The environmental control system can be configured to provide outside air to a passenger cabin of the aircraft in the absence of bleed air from the jet engine.
223 citations
5 Jul 2006
TL;DR: In this paper, a data center environmental control system that utilizes a distributed sensor network to manipulate conventional computer room air conditioning (CRAC) units within an air-cooled environment is presented.
Abstract: Increases in server power dissipation time placed significant pressure on traditional data center thermal management systems. Traditional systems utilize computer room air conditioning (CRAC) units to pressurize a raised floor plenum with cool air that is passed to equipment racks via ventilation tiles distributed throughout the raised floor. Temperature is typically controlled at the hot air return of the CRAC units away from the equipment racks. Due primarily to a lack of distributed environmental sensing, these CRAC systems are often operated conservatively resulting in reduced computational density and added operational expense. This paper introduces a data center environmental control system that utilizes a distributed sensor network to manipulate conventional CRAC units within an air-cooled environment. The sensor network is attached to standard racks and provides a direct measurement of the environment in close proximity to the computational resources. A calibration routine is used to characterize the response of each sensor in the network to individual CRAC actuators. A cascaded control algorithm is used to evaluate the data from the sensor network and manipulate supply air temperature and flow rate from individual CRACs to ensure thermal management while reducing operational expense. The combined controller and sensor network has been deployed in a production data center environment. Results from the algorithm will be presented that demonstrate the performance of the system and evaluate the energy savings compared with conventional data center environmental control architecture.
209 citations
1 Oct 2016
TL;DR: In this paper, typical aircraft electrical power systems and the loads associated with these requirements are described as well as the challenges for the aerospace industry in this implementation, the importance of Power Electronics as an enabling technology for this step change in aircraft design is considered and examples of typical system designs are discussed.
Abstract: There has recently been a major change in the design of aircraft. Electrical systems are being used in applications, which have traditionally been powered by hydraulic or pneumatic sources. The Boeing 787 and the Airbus A380 both have significantly larger electrical systems than any previous aircraft and this has led to a wealth of technology developments. Electrical systems are now being use for aircraft actuation systems, wing ice protection, environmental control systems and fuel pumping. These new systems are helping to make future aircraft more fuel efficient and quieter, improving the environment for everyone. However, this is just the start of the changes to aircraft design. A roadmap leading to a fully electric aircraft for civil applications is now emerging. The technology challenges involved for power electronics, electrical systems, control and electrical machines are being defined and these requirements give a view of the fantastic opportunities for research teams to make a real impact. The issues to be resolved include equipment weight, volume, cost and reliability. The More Electric Aircraft concept offers many potential benefits in the design and efficiency of future large, manned aircraft. In the future it is predicted that the trend in transportation electrification will lead to the development of all electric civilian aircraft concepts. In this paper typical aircraft electrical power systems and the loads associated with these requirements are described as well as the challenges for the aerospace industry in this implementation. The importance of Power Electronics as an enabling technology for this step change in aircraft design is considered and examples of typical system designs are discussed.
184 citations
Patent•
22 Dec 2000
TL;DR: In this article, the status of an HVAC system is transmitted to system administrators using a wireless link, and the status information about the status can be transferred to the administrator using a WLAN.
Abstract: Control apparatus for an environmental control system comprises input circuitry receiving environmental information and output circuitry for controlling an HVAC system. Processing circuitry in the controller configures the output circuitry based at least in part on the signals received on the input circuitry. Information about the status of the HVAC system may be transferred to system administrators using a wireless link.
176 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 9 |
| 2024 | 12 |
| 2023 | 12 |
| 2022 | 19 |
| 2021 | 17 |
| 2020 | 32 |