The Experts below are selected from a list of 210 Experts worldwide ranked by ideXlab platform
Nasa - One of the best experts on this subject based on the ideXlab platform.
-
Solar heating system at Security State Bank, Starkville, Mississippi
2013Co-Authors: Nasa, BankAbstract:The 312 square feet of Solaron flat plate air collectors provide for 788 square feet of space heating, an estimated 55 percent of the heating load. Solar heated air is distributed to the 96 cubic foot steel cylinder, which contains two inch diameter Rocks. An air handler unit moves the air over the collector and into the steel cylinder. Four motorized dampers and two gravity dampers are also part of the system. A Solaron controller which has sensors located at the collectors, Rock Storage, and at the return air, automatically controls the system. Auxiliary heating energy is provided by electric resistance duct heaters.
-
SIMS prototype system 4: Design data brochure
2013Co-Authors: NasaAbstract:A pre-package prototype unit having domestic hot water and room solar heating capability that uses air as the collector fluid is described. This system is designed to be used with a small single-family dwelling where a roof mounted collector array is not feasible. The prototype unit is an assemble containing 203 square feet of effective collector surface with 113 cubic feet of Rock Storage. The design of structure and Storage is modular, which permits expansion and reduction of the collector array and Storage bed in 68 square feet and 37 cubic feet increments respectively. The system is designed to be transportable. This permitted assemble and certification testing in one area and installation in another area without tear down and reassemble. Design, installation, operation, performance and maintenance of this system are described.
-
Solar heating system at Quitman County Bank, Marks, Mississippi
2013Co-Authors: NasaAbstract:Information on the Solar Energy Heating System installed in a single story wood frame, cedar exterior, sloped roof building is presented. The system has on-site temperature and power measurements readouts. The 468 square feet of Solaron air flat plate collectors provide for 2,000 square feet of space heating, an estimated 60 percent of the heating load. Solar heated air is distributed to the 235 cubic foot Rock Storage box or to the load (space heating) by a 960 cubic feet per minute air handler unit. A 7.5 ton Carrier air-to-air heat pump with 15 kilowatts of electric booster strips serve as a back-up (auxiliary) to the solar system. Motorized dampers control the direction of airflow and back draft dampers prevent thermal siphoning of conditioned air.
-
Solar Heating System installed at Belz Investment Company, Memphis, Tennessee
2013Co-Authors: Nasa, Belz Investment Co.Abstract:A hot air solar system which utilizes flat plate air collectors is discussed. Collector areas for each of four buildings cover 780 sq ft, with Storage capacity of 390 cu ft per building. The air system has a special air handling unit to move air through the collectors and into and out of the Rock Storage, with connection to the air duct distribution system. The heat of the motor is added to the heat delivered to the system. The solar system also includes four motorized special low leakage dampers and two gravity fabric dampers. The system is automatically controlled by a solid state controller with three thermistors: one located in the collectors, one in the Rock box to plenum, one in the return air duct from the heated space. A three stage heating thermostat, located in the conditioned space, controls the operation.
-
Solar heated two level residence--Akron, Ohio
2011Co-Authors: NasaAbstract:Report describes 1 year evaluation of solar heating and hot water system which satisfied 24 percent of energy requirements. System uses flat plate solar collectors with air as heat transport medium. Rock Storage bin stores collected energy; air to liquid heat pump supplies backup heat.
U. Lindblom - One of the best experts on this subject based on the ideXlab platform.
-
Analyses of gas Storage capacity in unlined Rock caverns
Rock Mechanics and Rock Engineering, 1994Co-Authors: J. Liang, U. LindblomAbstract:Groundwater control is a means of ensuring that no gas leakage occurs from unlined Rock Storage caverns. To achieve a better understanding of the principles of gas containment under groundwater and how to obtain maximum gas Storage capacity, analyses of groundwater conditions surrounding Storage caverns and the effects of different factors on gas Storage capacity have been performed and are reported in this paper. The analysis results indicate that the critical gas pressure of a Storage facility is considerably less than the natural hydrostatic pressure around the caverns and somewhat less than the water curtain pressure. High gas Storage capacity can be obtained by optimizing the design of cavern configuration, water curtain layout, cavern depth, etc. The principles of such optimization are outlined in this paper.
Jun Xiong - One of the best experts on this subject based on the ideXlab platform.
-
Gas leakage mechanism in bedded salt Rock Storage cavern considering damaged interface
Petroleum, 2015Co-Authors: Jun Xiong, Xiaolan Huang, Hongling MaAbstract:During the long-time operation of salt Rock Storage cavern, between its formations, damaged interfaces induced by discontinuous creep deformations between adjacent layers will possibly lead to serious gas leakage. In this paper, damaged interfaces are considered as main potential leakage path: firstly in meso-level, gas flow rule along the interface is analyzed and the calculation of equivalent permeability is discussed. Then based on porous media seepage theory, gas leakage simulation model including salt Rock, cavity interlayers and interface is built. With this strategy, it is possible to overcome the disadvantage of simulation burden with porous-fractured double medium. It also can provide the details of gas flowing along the damaged zones. Finally this proposal is applied to the salt cavern in Qianjian mines (East China). Under different operation pressures, gas distributions around two adjacent cavities are simulated; the evolvement of gas in the interlayers and salt Rock is compared. From the results it is demonstrated that the domain of creep damage area has great influence on leakage range. And also the leakage in the interface will accelerate the development of leakage in salt Rock. It is concluded that compared with observations, this new strategy provides closer answers. The simulation result proves its validity for the design and reasonable control of operating pressure and tightness evaluation of group bedded salt Rock Storage caverns.
-
numerical simulation of gas leakage in bedded salt Rock Storage cavern
Procedia Engineering, 2011Co-Authors: Xiaolan Huang, Jun XiongAbstract:Abstract Storage of hydrocarbons in underground salt caverns created by solution mining has been commonly and successfully used for several years in developed country. Sealing performance is an important technique and safety index for salt Rock gas Storage. Considering the unique stratigraphic characteristics of the bedded salt Rocks in China, interlayer has great influence on the tightness of salt carven. It is likely that stored natural gas will escape along the interface of interlayer. It is the key problem to establish the permeability model and to provide corresponding numerical simulation which is suitable for bedded salt Rock. In the paper, based on seepage theory in porous media, evolvement equation of gas permeability is established. The salt cavern in Jintan salt mines is taken as engineering background; during the operating period, the pressure distribution and gas leak distance at interface and layers with different operating pressures are studied. It is demonstrated that the gas infiltration velocity along the damaged interface is much faster than the salt Rock and mudstone interlayer, and damaged interface is the main gas leakage path. Moreover, with the bigger operation pressure, natural gas spreads much faster at the beginning years. The simulation results prove scientific basis for the design and reasonable control of operating pressure and tightness evaluation of bedded salt Rock Storage cavern.
H P Garg - One of the best experts on this subject based on the ideXlab platform.
-
PERFORMANCE OF INTEGRATED Rock BED SOLAR AIR HEATER
Energy Developments: New Forms Renewables Conservation, 2013Co-Authors: H P Garg, V K SharmaAbstract:This paper describes the design details and experimental investigations on a prototype solar air collector cum Storage systems, with an intention of providing the necessary inputs for agricultural requirements and resident heating. The system investigated is a conventional type flat plate solar collector connected in series with a Rock Storage cum collection unit. The overall goal of our investigations is to increase the Storage capacity without increasing the surface area of Rock and thus to reduce the total installed cost of the solar air heating system. The experimental results for varying mass flow depths, are reported. The effect of insulation cover of the previous night in heat decay characteristics has also been studied. Moreover, an attempt has also been made to analyze solar air collectors and to evaluate a few parameters, which are critical in designing an efficient solar collector.
-
Some mechanical aspects of low cost augmented integrated Rock system
Energy Conversion and Management, 2003Co-Authors: H P Garg, V K Sharma, R.b. Mahajan, A. K. BhargavaAbstract:Abstract The development of an augmented integrated Rock system is described in this paper. A unique AIRS (Flat Plate air heater connected in series with an integrated Rock Storage and collection system) concept is used as the absorber plate-to-air stream and then air stream-to-Rock bed Storage and collection unit heat transfer mechanism. The intention was to increase the efficiency of the air heater, over that of a ‘conventional’ type solar air heater by increasing the absorber area which includes the metallic absorber plate and the Rock surface exposed directly to the sun. The programme objective was to design a device which can store the energy during its operation and supply it during the evening and late night hours when there is no sun in the sky. In order to achieve this goal, we have fabricated, tested and evaluated ‘AIRS’, and the results obtained are presented in this paper.
-
Design and development of an augmented integrated solar collector with Rock Storage system for heating applications
Energy Conversion and Management, 1991Co-Authors: V K Sharma, G. Rizzi, H P GargAbstract:Abstract The main objective of this research communication is to furnish the necessary information to correctly design a solar air heating system that can be used for residential or agricultural applications. An inexpensive augmented integrated solar collector cum Storage system using Rocks as a sensible heat Storage medium has been designed and fabricated to provide low grade heat to suit the needs for space heating and agricultural applications. Experimental observations of fluid temperature, energy Storage and other measures of system performance are also presented in detail.
V K Sharma - One of the best experts on this subject based on the ideXlab platform.
-
PERFORMANCE OF INTEGRATED Rock BED SOLAR AIR HEATER
Energy Developments: New Forms Renewables Conservation, 2013Co-Authors: H P Garg, V K SharmaAbstract:This paper describes the design details and experimental investigations on a prototype solar air collector cum Storage systems, with an intention of providing the necessary inputs for agricultural requirements and resident heating. The system investigated is a conventional type flat plate solar collector connected in series with a Rock Storage cum collection unit. The overall goal of our investigations is to increase the Storage capacity without increasing the surface area of Rock and thus to reduce the total installed cost of the solar air heating system. The experimental results for varying mass flow depths, are reported. The effect of insulation cover of the previous night in heat decay characteristics has also been studied. Moreover, an attempt has also been made to analyze solar air collectors and to evaluate a few parameters, which are critical in designing an efficient solar collector.
-
Some mechanical aspects of low cost augmented integrated Rock system
Energy Conversion and Management, 2003Co-Authors: H P Garg, V K Sharma, R.b. Mahajan, A. K. BhargavaAbstract:Abstract The development of an augmented integrated Rock system is described in this paper. A unique AIRS (Flat Plate air heater connected in series with an integrated Rock Storage and collection system) concept is used as the absorber plate-to-air stream and then air stream-to-Rock bed Storage and collection unit heat transfer mechanism. The intention was to increase the efficiency of the air heater, over that of a ‘conventional’ type solar air heater by increasing the absorber area which includes the metallic absorber plate and the Rock surface exposed directly to the sun. The programme objective was to design a device which can store the energy during its operation and supply it during the evening and late night hours when there is no sun in the sky. In order to achieve this goal, we have fabricated, tested and evaluated ‘AIRS’, and the results obtained are presented in this paper.
-
Design and development of an augmented integrated solar collector with Rock Storage system for heating applications
Energy Conversion and Management, 1991Co-Authors: V K Sharma, G. Rizzi, H P GargAbstract:Abstract The main objective of this research communication is to furnish the necessary information to correctly design a solar air heating system that can be used for residential or agricultural applications. An inexpensive augmented integrated solar collector cum Storage system using Rocks as a sensible heat Storage medium has been designed and fabricated to provide low grade heat to suit the needs for space heating and agricultural applications. Experimental observations of fluid temperature, energy Storage and other measures of system performance are also presented in detail.
