Добірка наукової літератури з теми "2.4GHz low-power receivers"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "2.4GHz low-power receivers".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "2.4GHz low-power receivers"

1

D'amico, Stefano, Vito Giannini, and Andrea Baschirotto. "A Low-Power Reconfigurable Analog Filter for UMTS/WLAN Receivers." Analog Integrated Circuits and Signal Processing 46, no. 1 (December 14, 2005): 65–72. http://dx.doi.org/10.1007/s10470-005-4586-2.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Ziabakhsh, Soheil, Hosein Alavi-Rad, and Mustapha C. E. Yagoub. "A high-gain low-power 2–14GHz ultra-wide-band CMOS LNA for wireless receivers." AEU - International Journal of Electronics and Communications 66, no. 9 (September 2012): 727–31. http://dx.doi.org/10.1016/j.aeue.2012.01.002.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Saalfeld, Tobias, Tobias Piwczyk, Ralf Wunderlich, and Stefan Heinen. "A digital receiver signal strength detector for multi-standard low-IF receivers." Advances in Radio Science 16 (September 4, 2018): 51–57. http://dx.doi.org/10.5194/ars-16-51-2018.

Повний текст джерела
Анотація:
Abstract. This paper presents a receiver signal strength detector based on a discrete Fourier transform implementation. The energy detection algorithm has been designed and measured using a custom multi-standard transceiver ASIC with a low-IF receiver at 0.5, 1 and 2 MHz IF. The proposed implementation directly processes the single bit ΔΣ modulator data and features a clear channel assessment for arbitrary modulation schemes without energy consuming demodulation. Continuous monitoring of the derivative of the RSSI takes advantage of faster coefficient convergence for higher power levels and reduces computation time. A dynamic range of 65 dB has been achieved in FPGA based measurements with a linearity error of less than 1.2 dB. Furthermore, synthesis results for an on-chip implementation for an 130 nm RF CMOS technology show an overall power consumption of 1.5 mW during calculation.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Cheng, Y., J. Gong, and C. Y. Wu. "New CMOS 2 V low-power IF fully differential Rm-C bandpass amplifier for RF wireless receivers." IEE Proceedings - Circuits, Devices and Systems 148, no. 6 (2001): 318. http://dx.doi.org/10.1049/ip-cds:20010570.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Kersten, Tobias, and Jens-André Paffenholz. "Feasibility of Consumer Grade GNSS Receivers for the Integration in Multi-Sensor-Systems." Sensors 20, no. 9 (April 26, 2020): 2463. http://dx.doi.org/10.3390/s20092463.

Повний текст джерела
Анотація:
Various GNSS applications require low-cost, small-scale, lightweight and power-saving GNSS devices and require high precision in terms of low noise for carrier phase and code observations. Applications vary from navigation approaches to positioning in geo-monitoring units up to integration in multi-sensor-systems. For highest precision, only GNSS receivers are suitable that provide access to raw data such as carrier phase, code ranges, Doppler and signal strength. A system integration is only possible if the overall noise level is known and quantified at the level of the original observations. A benchmark analysis based on a zero baseline is proposed to quantify the stochastic properties. The performance of the consumer grade GNSS receiver is determined and evaluated against geodetic GNSS receivers to better understand the utilization of consumer grade receivers. Results indicate high similarity to the geodetic receiver, even though technical limitations are present. Various stochastic techniques report normally distributed carrier-phase noise of 2 mm and code-range noise of 0.5–0.8 m. This is confirmed by studying the modified Allan standard deviation and code-minus-carrier combinations. Derived parameters serve as important indicators for the integration of GNSS receivers into multi-sensor-systems.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

ABEDIN, M. NURUL, TAMER F. REFAAT та UPENDRA N. SINGH. "NOISE MEASUREMENT OF III-V COMPOUND DETECTORS FOR 2 μm LIDAR/DIAL REMOTE SENSING APPLICATIONS". International Journal of High Speed Electronics and Systems 12, № 02 (червень 2002): 531–40. http://dx.doi.org/10.1142/s0129156402001447.

Повний текст джерела
Анотація:
Noise of a photodetector plays a vital role in determining the minimum detectable signal for lidar and DIAL receivers. A low noise trans-impedance amplifier circuit has been employed to examine the noise of III-V compound infrared detectors. These infrared detectors include InGaAs PIN diodes and newly developed InGaAsSb avalanche photodiodes (APDs) with separate absorption and multiplication (SAM) structure. The noise of these detectors are compared with well-established Si APDs. These measured noises are utilized to compute the figures-of-merit, such as noise-equivalent-power (NEP) and detectivity (D*) of these devices and are presented in this paper.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Tian, Feng, Yang Bo Huang, Bo Xu, and Gang Ou. "An Optimized Low-Power-Consumption Tracking Algorithm Based on Navigation Message Structure for Weak Signals." Applied Mechanics and Materials 733 (February 2015): 854–59. http://dx.doi.org/10.4028/www.scientific.net/amm.733.854.

Повний текст джерела
Анотація:
In order to reduce the power consumption of handset GNSS receivers, we present a novel algorithm that tracks signals at fixed positions of the navigation message in an intermittent mode. The tracking channels only run during the beginning part of the message frame. In the rest they remain in idle state, to reduce power consumption of the channel. The beginning position of each message frame can be estimated accurately, and the beginning messages are constant or can be estimated, thus the coherent integration time can exceed one navigation bit, which can improve the Doppler frequency estimated accuracy. At the fixed position of the frame, the tracking channel only tracks the pseudo-code phase, and does not track the carrier frequency and phase. This algorithm can keep stable tracking for weak signals with 28 dBHz carrier-to-noise ratio (C/N0), while using only 2% of the power required by the computation associated with the traditional tracking.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Biryulin, V. I., D. V. Kudelina, and I. V. Brezhnev. "Electricity quality problems investigation in networks with a voltage of 0,4 kV." Power engineering: research, equipment, technology 24, no. 2 (June 13, 2022): 73–85. http://dx.doi.org/10.30724/1998-9903-2022-24-2-73-86.

Повний текст джерела
Анотація:
THE PURPOSE. Consider the issues of electricity quality in power supply systems and the results obtained by the authors of the article when monitoring the electrical energy quality in urban electrical networks with a voltage of 0.4 kV. The results of these measurements indicate that at some facilities there are violations of the electricity quality in almost all indicators. Therefore, to ensure proper quality, it is necessary to develop comprehensive measures to maintain power quality indicators within the established limits.METHODS. When solving the problem, methods of comparison and analysis of experimental data were used. RESULTS. We indicate the main problems which inevitably arise when the quality of electrical energy decreases. Present the causes of the electricity low quality. It is shown that in this case there is a violation of the various electrical receivers operation.CONCLUSION. We indicate that earlier investigations of the electrical energy quality mainly considered power supply systems and power receivers of industrial enterprises. We present the examples of poor electricity quality, including in the event of voltage fluctuations. Therefore, when developing measures to maintain the electricity quality within acceptable limits in urban electrical networks, monitoring of electricity quality indicators should be carried out. Only on the basis of its results it is necessary to develop a set of measures to improve the electricity quality. This approach is also expedient because the electricity consumers can potentially order monitoring of the electric energy quality to specialized organizations and, in case of non-compliance with the requirements of GOST 32144-2013, file lawsuits against power supply organizations about violations of the electricity quality with great chances of satisfying them.
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Wu, Mingkui, Shuai Luo, Wang Wang, and Wanke Liu. "Performance Assessment of BDS-2/BDS-3/GPS/Galileo Attitude Determination Based on the Single-Differenced Model with Common-Clock Receivers." Remote Sensing 13, no. 23 (November 29, 2021): 4845. http://dx.doi.org/10.3390/rs13234845.

Повний текст джерела
Анотація:
Global navigation satellite system (GNSS)-based attitude determination has been widely applied in a variety of fields due to its high precision, no error accumulation, low power consumption, and low cost. Recently, the emergence of common-clock receivers and construction of GNSS systems have brought new opportunities for high-precision GNSS-based attitude determination. In this contribution, we focus on evaluating the performance of the BeiDou regional navigation satellite system (BDS-2)/BeiDou global navigation satellite system (BDS-3)/Global Positioning System (GPS)/Galileo navigation satellite system (Galileo) attitude determination based on the single-differenced (SD) model with a common-clock receiver. We first investigate the time-varying characteristics of BDS-2/BDS-3/GPS/Galileo line bias (LB) with two different types of common-clock receivers. The results have confirmed that both the phase and code LBs are relatively stable in the time domain once the receivers have started. However, the phase LB is expected to change to an arbitrary value after each restart of the common-clock receivers. For the first time, it is also found that the phase LBs of overlapping frequencies shared by different GNSS systems are identical. Then, we primarily evaluated the performance of BDS-2/BDS-3/GPS/Galileo precise relative positioning and attitude determination based on the SD model with a common-clock receiver, using a static dataset collected at Wuhan. Experimental results demonstrated that, compared with the double-differenced (DD) model, the SD model can deliver a comparable root–mean–square (RMS) error of yaw but a significantly smaller RMS error of pitch, whether for BDS-2, BDS-3, GPS, or Galileo alone or a combination of them. The improvements of pitch accuracy are approximately 20.8–47.5% and 40.7–57.5% with single- and dual-frequency observations, respectively. Additionally, BDS-3 can deliver relatively superior positioning and attitude accuracy with respect to GPS and Galileo, due to its better geometry. The three-dimensional positioning and attitude (including yaw and pitch) accuracy for both the DD and SD models can be remarkably improved by the BDS-2, BDS-3, GPS, and Galileo combination with respect to a single system alone.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Pastukh, Alexander, Evgeny Deviyatkin, Alexandr Savochkin, and Valery Tikhvinskiy. "INTERFERENCE ANALYSIS OF UWB DEVICES TO THE SATELLITE SERVICES IN THE 7240-8240 MHZ FREQUENCY BAND." SYNCHROINFO JOURNAL 8, no. 3 (2022): 2–6. http://dx.doi.org/10.36724/2664-066x-2022-8-3-2-6.

Повний текст джерела
Анотація:
Ultra-wideband radio technology (UWB), is a wireless access technology that allows exchanging of data over a radio channel between over short distances at very high speed and low power consumption. UWB signals are short pulses the entire energy of which is distributed over a given wide region of the spectrum. With a sufficiently high total power transmitted over the air and with low power consumption and a pulsed nature of data transmission, a high data transmission rate can be obtained. This work has done interference analysis of ultra-wide bandwidth technologies (UWB) operating in the frequency band 7240-8240 MHz to the Earth monitoring and meteorological satellite systems that operate in this band. Taking into account the rapid development of users’ UWB devices in different frequency bands, the study tries to estimate the long-term impact of aggregate interference from UWB devices located around the satellite Earth stations. The study considers two satellite systems as an example of victim receivers. The UWB density assumptions made in the studies are based on the forecasts of CEPT and UWB Alliance.
Стилі APA, Harvard, Vancouver, ISO та ін.

Дисертації з теми "2.4GHz low-power receivers"

1

Nicolson, Sean Timothy. "Low-voltage and low-power silicon transceivers and receivers for W-band and D-band applications /." 2008. http://proquest.umi.com/pqdlink?did=1659882301&sid=2&Fmt=2&clientId=12520&RQT=309&VName=PQD.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Книги з теми "2.4GHz low-power receivers"

1

Lin, Zhicheng, Pui-In Mak, and Rui Paulo Martins. Ultra-Low-Power and Ultra-Low-Cost Short-Range Wireless Receivers in Nanoscale CMOS. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21524-2.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "2.4GHz low-power receivers"

1

Crepaldi, Marco, Mario R. Casu, Mariagrazia Graziano, and Maurizio Zamboni. "A Low-power CMOS 2-PPM Demodulator for Energy Detection IR-UWB Receivers." In 2007 IEEE International Conference on Ultra-Wideband. IEEE, 2007. http://dx.doi.org/10.1109/icuwb.2007.4380989.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Virot, L., L. Vivien, J. M. Hartmann, J. M. Fedeli, D. Marris Morini, E. Cassan, C. Baudot, and F. Boeuf. "P-I-N Ge on Si photodiodes for high speed and low power consumption receivers." In 2012 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2012. http://dx.doi.org/10.7567/ssdm.2012.a-7-2.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Shang, A. Z., and F. A. P. Tooley. "A Generalized Family of Optical Receivers for Optical Interconnects." In Optics in Computing. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/oc.1997.otha.2.

Повний текст джерела
Анотація:
Optical energy is limited in any optical interconnect system. Therefore we require an amplifier to decrease the optical energy for data communication. Electrical power consumed by this amplifier reduces the optical power required. An optical receiver for parallel interconnected systems (e.g., optical interconnected VLSI chips) must be moderately sensitive (-30 dBm to -20 dBm), low- electrical power (< 7 dBm), and high-speed (bit rate, B, in the hundreds of Mb/s). It also needs to be low-noise. A small dynamic range (<3 dB) can usually be tolerated since the optical power level can be set to this accuracy. The challenge in VLSI optical receiver design is to meet the above requirements simultaneously [1].
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Kobayashi, Tetsuro, Akihiro Morimoto, Bong Young Lee, and Tadasi Sueta. "A New Method of Ultrashort Pulse Generation – Modified Fabry-Perot Electrooptic Modulator –." In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/up.1990.wc16.

Повний текст джерела
Анотація:
To generate ultrashort optical pulses, modelocking of lasers has ordinarily been used. Even using this excellent method, however, we can not generate subpicosecond pulse from narrow-linewidth lasers because the pulse width is limited by gain-linewidth of the laser. On the other hand, a Fabry-Perot electrooptic modulator (FP modulator) [1] is applicable to almost all kinds of lasers and can produce subpicosecond pulses without any linewidth limitation. Actually 0.8ps pulses were obtained from an Ar laser (linewidth: 4GHz)[2]. Unfortunately, the FP modulator has a disadvantage of low power efficiency. Since the peak value of the power transmittance of it is at most unity, the energy efficiency (average output power/average input power) becomes smaller as the pulsewidth becomes shorter as shown in Fig. 1(a).
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Ortega, Jesus D., Sagar D. Khivsara, Joshua M. Christian, and Clifford K. Ho. "Design Requirements for Direct Supercritical Carbon Dioxide Receiver Development and Testing." In ASME 2015 9th International Conference on Energy Sustainability collocated with the ASME 2015 Power Conference, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/es2015-49489.

Повний текст джерела
Анотація:
This paper establishes the design requirements for the development and testing of direct supercritical carbon dioxide (sCO2) solar receivers. Current design considerations are based on the ASME Boiler and Pressure Vessel Code (BPVC). Section I (BPVC) considers typical boilers/superheaters (i.e. fired pressure vessels) which work under a constant low heat flux. Section VIII (BPVC) considers pressure vessels with operating pressures above 15 psig [2 bar] (i.e. unfired pressure vessels). Section III, Division I – Subsection NH (BPVC) considers a more detailed stress calculation, compared to Section I and Section VIII, and requires a creep-fatigue analysis. The main drawback from using the BPVC exclusively is the large safety requirements developed for nuclear power applications. As a result, a new set of requirements is needed to perform detailed thermal-structural analyses of solar thermal receivers subjected to a spatially-varying, high-intensity heat flux. The last design requirements document of this kind was an interim Sandia report developed in 1979 (SAND79-8183), but it only addresses some of the technical challenges in early-stage steam and molten-salt solar receivers but not the use of sCO2 receivers. This paper presents a combination of the ASME BPVC and ASME B31.1 Code modified appropriately to achieve the reliability requirements in sCO2 solar power systems. There are five main categories in this requirements document: Operation and Safety, Materials and Manufacturing, Instrumentation, Maintenance and Environmental, and General requirements. This paper also includes the modeling guidelines and input parameters required in computational fluid dynamics and structural analyses utilizing ANSYS Fluent, ANSYS Mechanical, and nCode Design Life. The main purpose of this document is to serve as a reference and guideline for design and testing requirements, as well as to address the technical challenges and provide initial parameters for the computational models that will be employed for the development of sCO2 receivers.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Pitz-Paal, Robert, Ju¨rgen Dersch, Barbara Milow, Fe´lix Te´llez, Alain Ferriere, Ulrich Langnickel, Aldo Steinfeld, Jacob Karni, Eduardo Zarza, and Oleg Popel. "Development Steps for Concentrating Solar Power Technologies With Maximum Impact on Cost Reduction: Results of the European ECOSTAR Study." In ASME 2005 International Solar Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/isec2005-76081.

Повний текст джерела
Анотація:
Beside continuous implementation of concentrating solar power plants (CSP) in Europe, which stipulate cost reduction by mass production effects, further R&D activities are necessary to achieve the cost competitiveness to fossil power generation. Therefore the cost range of 15–20 cents€/kWh for the currently planned CSP systems in Europe has to be decreased by a factor of 2–4. The European Concentrated Solar Thermal Roadmap (ECOSTAR) study that is conducted by leading CSP research institutes in Europe intends to stipulate the direction for R&D activities in the context of cost reduction. It uses a common methodology approach, based on an annual performance model to identify the most essential technical innovations that will reduce the cost of seven different CSP system concepts, which are currently under promotion world wide. The potential of innovative concepts for solar light weight concentrators, low-cost thermal energy storage concepts, solar receivers/absorbers and power cycles are in the main focus of interest. The results of the study include a description of the value of CSP power, the sensitivity of the electricity cost information, a list of innovations that have been investigated and recommendations for the focus of further R&D work.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Khalili, Fardin, Pradip Majumdar, and Mehdi Zeyghami. "Far-Field Noise Prediction of Wind Turbines at Different Receivers and Wind Speeds: A Computational Study." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-53006.

Повний текст джерела
Анотація:
Far-field noise propagation from wind turbines propel development of wind farms to an issue for public acceptance. Airstream contains pressure fluctuations as a result of instability, giving a regular eddy pattern or an irregular turbulent motion which are responsible for the sound produced by wind turbine blades. Aeroacoustic noise emanated from a wind turbine is mainly generated by the interactions of tip and trailing edge of wind turbine blades with the mechanics in wake region such as inflow turbulence structures, boundary layer separation and vortex shedding. Hence, there is a strong necessity for an analytical investigation for noise reducing design and development of the technology in order to further expand wind farms. The objectives of this study are to analyze the far-field aeroacoustics of wind turbines with the purpose of predicting far-field sound pressure levels at different receivers and monitoring total acoustic power captured within wind turbine performance for various wind speeds. Blades are modeled based on NREL S825 airfoil since it has high maximum lift and low profile drag. With the purpose of predicting far-field noise, the Ffowcs Williams-Hawkings (FW-H) acoustics model is the preferred method in order to compute the far-field sound signal which is released from near-field flow. As the key attribute of the research, detached eddy simulation (DES) provides accurate results for the desired simulation since it is a hybrid modeling approach that combines features of Reynolds-averaged Navier-Stokes (RANS) simulation in boundary layers and irrotational flow regions, and large-eddy simulation (LES) in unsteady separation regions. In addition, SST K-Omega detached eddy turbulence model is used due to its good compromise between robustness, computational cost and accuracy. Aerodynamic and aeroacoustic analysis of a wind turbine is performed using a three-dimensional model and a commercial CFD Software, STAR-CCM+. In order to predict far-field sound pressure levels and acoustic powers on different locations, five point receivers are defined downstream of the wind turbine model. Receivers are placed one diameter, D, over the wind turbine rotor blades with 1D, 2D, 5D, 10D and 15D away from the wind turbine that represent receivers 1 to 5. Higher acoustic powers are delivered at closer receivers. It means that acoustic power fades out with larger distances. It is observed that there is a fractional variation of 61%, 17%, 6% and 3% as compared to the receiver 1 for receivers 2, 3, 4 and 5 respectively. Moreover, the results show that variation in total acoustic power is non-linear and higher acoustic powers will be captured for higher velocities. This comparison is done between wind speeds of 10m/s and 15m/s.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Thienpont, H., G. Verschaffelt, R. Buczynski, P. Tuteleers, P. Vynck, V. Baukens, S. Kufner, et al. "Demonstration of a Monolithic Micro-Optical Bridge for Free-Space Intrachip Interconnects." In Diffractive Optics and Micro-Optics. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/domo.1998.dtud.5.

Повний текст джерела
Анотація:
Future advances in the application of photonic interconnects will involve the insertion of parallel-channel links into Multi-Chip Modules (MCMs) [1]. These will make use of new device-level components such as arrays of Vertical Cavity Surface Emitting Lasers (VCSEL's) [2] or arrays of Micro Cavity Light-Emitting Diodes (MCLED’s) [3] and low power photoreceiver circuits [4]. One of the challenges associated with the development of free-space intra- and inter-MCM optoelectronic interconnects is the fabrication of manufacturable, chip-compatible, and high precision monolithic micro-optical pathway blocks. These three-dimensional modules should integrate micro-optical components to optically interconnect surface-normal transmitters and receivers.
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Diver, Richard B., Charles E. Andraka, K. Scott Rawlinson, Vern Goldberg, and Gary Thomas. "The Advanced Dish Development System Project." In ASME 2001 Solar Engineering: International Solar Energy Conference (FORUM 2001: Solar Energy — The Power to Choose). American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/sed2001-112.

Повний текст джерела
Анотація:
Abstract The objective of the Advanced Dish Development System (ADDS) project is to develop and validate a 9-kWe dish/Stirling solar power system that meets the needs of the remote power marketplace. Key market criteria for concentrating solar power entry into remote power applications such as water pumping and village electrification are reliable unattended operation, minimal and low technology service requirements, and the ability to compete with the cost of alternatives. The Advanced Dish Development System is a test bed for advanced components and systems level testing to address the issues of the remote power market. The ADDS project involves integration and test, at a system level, of advanced dish/Stirling systems. The basic design utilizes the WGAssociates solar concentrator and controls, and the SOLO 161 Stirling Power Conversion Unit. Development has focused on extending the application of dish/Stirling systems to water pumping, reliability improvement and incorporating advanced components such as structural facets, heat pipe receivers, and advanced controls and communications. Testing includes long-term unattended, automatic operation of stand-alone 9-kWe dish/Stirling solar power generation systems in both on and off-grid modes at the National Solar Thermal Test Facility (NSTTF) in Albuquerque, NM and in the field. In 1999, a first generation (Mod 1) system was fielded at the NSTTF and routine unattended operation initiated. In 2000, a system reliability tracking system was implemented on the Mod 1 system and an upgraded, second-generation (Mod 2) system, including a stand-alone water-pumping capability was developed. To better understand the market and system requirements, field-testing will be conducted at one or more American Indian applications partners test sites in the Southwest U.S. Partnering agreements have been initiated with four tribes and familiarization training completed. In this paper, the ADDS project plan and technical approach are presented. The major system components and features along with test results and project status are also described.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Angel, Roger, and Justin Hyatt. "Track and Tilt Collection for Central Receiver CSP." In ASME 2016 10th International Conference on Energy Sustainability collocated with the ASME 2016 Power Conference and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/es2016-59618.

Повний текст джерела
Анотація:
Here we describe a new type of point-focus solar collector for CSP called “track and tilt”. It bridges the gap between dish and heliostat arrays collectors, having the high optical efficiency of a dish but with larger aperture (> 1000 m2) focused to a tower mounted receiver in fixed gravity orientation. It is well matched to the next generation of high efficiency cavity receivers transferring heat to a storage medium at temperatures exceeding 700C. The collector uses silvered glass reflectors mounted on a rotating, rigid structure in the form of a 120 degree conical arc. In operation, this large structure rotates in azimuth on a track around the central receiver tower, keeping the gravity load on the structure constant. The central receiver is rotated about a vertical axis so as to face the reflector arc. The reflectors are concave, all with the same focal length, and are individually tilted to follow solar elevation to focus sunlight onto the tower-mounted receiver. A detailed optical model made of a collector with 40 m focal length has 1,450 m2 total reflector area, and delivers on average 1.2MW of sunlight to the receiver, (under 1000 W/m2 DNI and allowing for reflector and small geometric losses). The collector forms an only slightly aberrated image of the sun at the receiver, showing a concentration of 2000x averaged over the receiver entrance with spillage < 2%. The overall annual averaged efficiency, defined as (total sunlight energy delivered to the receiver entrance)/(direct normal irradiance × total reflector area) is >80%. This calculation includes 90% reflectivity of the mirrors. To avoid the high mass and cost of a structure which must withstand 85 mph winds, our unique arc support structure takes the form of four lightly built panels which are lowered to the ground in high wind and for maintenance. Cables from the central tower are used to lower and raise the panels into operating position where they are locked together. The top section of the tower carrying the cable mechanism and the receiver rotate on a bearing in synchronization with the track mounted reflector assembly. The small scale of the collector unit means that a first prototype of the radical new architecture can be built and tested at relatively modest cost. Higher power systems with multiple collectors and receivers might be built either with individual storage and turbines, such as sCO2, or with heat transfer to a common storage and power generation facility (as in trough systems). Continual improvements of the collector should be affordable, as system iteration costs are low.
Стилі APA, Harvard, Vancouver, ISO та ін.
Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!

До бібліографії