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... sockets for gas burning appliances Part 2 Specification for corrugated metallic flexible hoses, covers, end fittings and sockets for catering appliances burning 1st, 2nd and 3rd family gases Trang ... Manufacturers' Association Council for Registered Gas Installers Energy Industries Council Health and Safety Executive LP Gas Association Society of British Gas Industries The Association of Catering ... 1st and 2nd family gases Part 2 : Specification for corrugated metallic flexible hoses, covers, end fittings and sockets for catering appliances burning 1st and 2nd family gases This Part of

Ngày tải lên: 28/09/2014, 23:11

... flues that were intended originally for appliances burning other fuels but which are subsequently used for gas appliances NOTE 1 For information on flues for appliances having rated inputs exceeding ... installation requirements for flue systems which form part of a new or replacement appliance installation for domestic or commercial purposes It specifies natural and fanned draught flues for appliances ... with appliances which take air for combustion from either inside or outside the appliance space See BS 5440-2 for specific ventilation requirements. For all these forms of flue system, the motive

Ngày tải lên: 28/09/2014, 23:27

... given for natural gas gross CV quoted in brackets where appropriate The ratio of gross:net heat input is approximately 1.11:1 for natural gas, 1.09:1 for propane and 1.08:1 for butane For example, ... for Registered Gas Installers (CORGI) Thus it is essential that all business or self employed gas fitters should be registered with CORGI Guidance on the individual competency required for gas ... no formally agreed standard for the design or production of air vents for use with gas appliances and thus manufacturers are not obliged to mark their products with an area calculated in a uniform

Ngày tải lên: 28/09/2014, 23:27

... technique with the enhancement in both Trang 15gas separation performance and plasticization pressure PIM-1 has been known for its superior gas separation performance However, PIM-1 does not dissolve ... 179 Table 7.4 Comparison of gas separation performance of PIM-1/Matrimid (10:90) hollow fiber membranes before and after heat treatment 181 Table 7.5 Gas separation performance of PIM-1/Matrimid ... natural gas for electricity production EIA estimates that natural gas production will increase from 69.9 Bcf/d in 2013 to 70.4 Bcf/d in 2014 [2] At the meanwhile, the price for natural gas is

Ngày tải lên: 09/09/2015, 11:27

... candidate for future applications in the industrial gas separation processes owing to its remarkable gas separation performance However, besides the aforementioned, there is limited research performed ... 3.3: Schematic for a constant volume-variable pressure gas permeation chamber for testing mixed gas permeation properties of a flat membrane 57Figure 3.4: Schematic of mixed gas permeation system ... concern for industrial scale-up In terms of stability, glassy polymers outperform rubbery materials Therefore, in recent years, many glassy materials with improved gas separation performance

Ngày tải lên: 10/09/2015, 09:27

... over B α D i,j Ideal selectivity of a gas pair for diffusivity α* i,j Ideal selectivity of a gas pair for permeability α S i,j Ideal selectivity of a gas pair for solubility ∆µ i Chemical potential ... Comparison of separation performance for hollow fiber membranes between the O2/N2 mixed gas and pure gas measurements……… … 245Table B.3 Comparison of separation performance for hollow fiber membranes ... thickness for the fibers heat treated at 200oC for 2 hours before coating……… ….… 168 Fig 7.9 He/N2, O2/N2 selectivity as function of the outer layer thickness for the fibers heat treated at 200oC for

Ngày tải lên: 12/09/2015, 11:24

... Acid Gas Removal from Nature Gas Natural gas processing is also a large potential market for membrane technology The removal of carbon dioxide and hydrogen sulphide impurities is needed before ... transport of gases In this mechanism, the gas molecular sizes, gas condensability, the polymeric chain packing and chain mobility affect the gas transport Table 2.1 Mean Free Path of Gases at 0 ... in a Gas Permeation Cell ……… 171 Trang 10Summary Polyimides have become of interest in recent years as membrane materials for gas separation processes, due to their good separation performance

Ngày tải lên: 15/09/2015, 17:10

... Interestingly, the gas permeability with annealing temperature shows double peaks for medium-size gases such as O2, N2 and CH4, and single peaks for light gases such as He, H2 and CO2 The temperature for transport ... protocols all show similar and superior performance for gas separation Solvents were observed to play an important role on membrane morphology and gas separation performance of a novel 6FDA/PMDA-TMMDA ... (CMSMs) for Gas Separation MSMs are promising inorganic materials for gas separation in terms of separation MSMs can be practically derived from various polymeric precursors [83-88] by C performance

Ngày tải lên: 16/09/2015, 15:54

... compressors and turbines, shaft speed make the formulation much more complex that are unfavorable for commercial solvers Therefore, the model is formulated in a simpler fashion without compromising ... constants     Figure 4.1 Multi-stage superstructure for each stream in WEN synthesis  Trang 54.3 MINLP Formulation for a Fixed SSTC Speed For simplicity, we first assume a known speed of the ... a heater (for HP streams) or cooler (for LP streams) in front A final heater or cooler after stage K s terminates the superstructure for stream s   Figure 4.2 Stage superstructure for a high-pressure

Ngày tải lên: 13/10/2015, 16:41

... feed N   (3.1) the model for feed stream exchanging energy with three different refrigeration cycles Second, we formulate model for PR cycle Third, we formulate model for MR cycle that includes ... applicable for both vapor and liquid streams, we only describe formulation for vapor stream Enthalpy of any MR vapor stream comprises of three terms: ideal heat of formation H f v , ideal gas enthalpy ... mr_6 are the enthalpy of MR stream before Trang 16propane pre-cooler, before MCHE, before valve, after valve, and after MCHE accordingly Calculation of the aforementioned enthalpy in two phase

Ngày tải lên: 13/10/2015, 16:41

... permeance of composite membranes for several gases 50 5.10 Relative permselectivity for composite membranes for several gas pairs 51 Trang 155.12 Relative permselectivity for asymmetric membranes irradiated ... 7.14 Relative area for C=O for all ions as a function of ion dose 112 7.15 Relative area for CF3 group for all ions as a function of in dose 112 7.16 Relative area for C=O for all ions as a ... Permselectivity for Irradiated Samples of 6FDA-6FpDA 171 Trang 143.1 Repeat unit for Polysulfone 8 3.2 Repeat unit for 6FDA-6FpDA 10 3.3 Trade-off curve for O2/N2 11 3.4 Monte Carlo Simulation for H+

Ngày tải lên: 05/07/2016, 14:27

... Librarian, SPE, P.O Box 833836, Richardson, TX 75083-3836, U.S.A., fax 01-972-952-9435 Abstract A new simple method of establishing Inflow Performance Relationship for gas condensate wells ... Inflow Performance Relationship (IPR) for Gas Condensate Wells Sarfraz A Jokhio and Djebbar Tiab/University of Oklahoma, SPE MEMBERS Trang 2P eP d P * P w f S w c Fig.2 Three regions in a gas condensate ... productivity index estimations for oil wells (J = q/∆P) was being used until 1968 for solution solution-gas reservoirs, which handles the two-phase flow of oil and gas Vogel using Weller’s concepts

Ngày tải lên: 26/09/2016, 11:47

... and low uniform Hydrothermal treatment, inversely, can mass synthesize variety morphologies of nanomaterials uniformly and cheaply at low temperature Therefore it has been choosing for synthesizing ... 211.2.3 Solid state gas sensor Figure 5 Solid state gas sensor. Gas sensing materials are some special materials which have ability of changing their properties in ambient gas Normally, they ... exposing in most of gas sensors are still imperfect For SnO2 gas sensors, two typical categories which are now utilizing widely are bulk-type and film-type The bulk-type gas sensor (or can also

Ngày tải lên: 15/07/2017, 23:28

... description of gas purification by using MOFs MOFs have also been investigated for the removal of other toxic gases such as CO and SO2 for the purification of flue gas and the reduction of harmful gases ... capacity of the gases that makes MOFs becoming the leading material for hydrogen and methane storage 2.2 Gas capture for environmental issues The emission of carbon dioxide and other toxic gases due ... scope Therefore, the aim of this paper is to provide a short overview of this material for gas capture and storage to scientists and researchers in Vietnam 2 Metal-organic frameworks for gas capture

Ngày tải lên: 14/12/2017, 16:36

... Valves for Gas Distribution Manually Operated, NPS 2½ (DN 65) to NPS 12 (DN 300), 125 psig (8.6 bar) Maximum Trang 3ASME B16.38-2012(Revision of ASME B16.38-2007) Large Metallic Valves for Gas ... American Gas Association determined that standardization of gas valves used in distribution systems was desirable and needed The A.G.A Task Committee on Standards for Valves and Shutoffs was formed ... in piping systems indicated above, carrying natural gas, manufactured gas [includes syn-thetic natural gas (SNG)], and liquefied petroleum gases (distributed as a vapor, with or without the admixture

Ngày tải lên: 07/08/2018, 11:41

... and low uniform Hydrothermal treatment, inversely, can mass synthesize variety morphologies of nanomaterials uniformly and cheaply at low temperature Therefore it has been choosing for synthesizing ... 211.2.3 Solid state gas sensor Figure 5 Solid state gas sensor. Gas sensing materials are some special materials which have ability of changing their properties in ambient gas Normally, they ... exposing in most of gas sensors are still imperfect For SnO2 gas sensors, two typical categories which are now utilizing widely are bulk-type and film-type The bulk-type gas sensor (or can also

Ngày tải lên: 28/02/2021, 15:00

... depletion layer for n-type semiconductors or a hole accumulation layer for p-type semiconductors on the surface of SMO-NW as a core–shell model is responsible for the performance of single NW gas sensors ... developed for for gas nanosensor development Comini and coworkers initially explored the gas-sensing post-synthesis techniques, but these techniques are limited by various factors Thus, SnO2 NW gas ... p-type SMO gas sensors exhibit more promising gas sensing materials for various applications than n-type SMO gas sensors do Huber and coworkers demonstrated that the response of p-type SMO gas sensors

Ngày tải lên: 17/03/2021, 20:19

... Zn2SnO4 etc and examine their gas-sensitive characteristics for applications on nano gas sensors Trang 301.2.4 Gas sensitivity mechanism of metal oxide for VOCs Gas sensors based on semiconductor ... application of the Zn2SnO4 hollow block for VOC gas sensor applications Therefore, this thesis targets to the “Fabrication of Zn 2 SnO 4 nanostructures for gas sensor application” 2 Aims of the ... excellent gas sensor performance with isoprene gas Both ZnO nanoparticles and Trang 33ZnO quantum dots have gas detection limits below 0.01 ppm In this study, the ability to enhance the gas sensitivity

Ngày tải lên: 07/04/2021, 10:59

... Zn2SnO4 etc and examine their gas-sensitive characteristics for applications on nano gas sensors Trang 301.2.4 Gas sensitivity mechanism of metal oxide for VOCs Gas sensors based on semiconductor ... application of the Zn2SnO4 hollow block for VOC gas sensor applications Therefore, this thesis targets to the “Fabrication of Zn 2 SnO 4 nanostructures for gas sensor application” 2 Aims of the ... excellent gas sensor performance with isoprene gas Both ZnO nanoparticles and Trang 33ZnO quantum dots have gas detection limits below 0.01 ppm In this study, the ability to enhance the gas sensitivity

Ngày tải lên: 26/04/2021, 11:42

... Zn2SnO4 etc and examine their gas-sensitive characteristics for applications on nano gas sensors Trang 301.2.4 Gas sensitivity mechanism of metal oxide for VOCs Gas sensors based on semiconductor ... application of the Zn2SnO4 hollow block for VOC gas sensor applications Therefore, this thesis targets to the “Fabrication of Zn 2 SnO 4 nanostructures for gas sensor application” 2 Aims of the ... excellent gas sensor performance with isoprene gas Both ZnO nanoparticles and Trang 33ZnO quantum dots have gas detection limits below 0.01 ppm In this study, the ability to enhance the gas sensitivity

Ngày tải lên: 30/04/2021, 08:19