Fire Safety Guidelines for HDB Estates The Land Transport Authority (LTA) in Singapore is extending free pre-peak travel on the rail network by one year to 23 June 2015 following a successful trial. The initiative launched in June 2013, offers commuters who end their journey before 7.45am on weekdays at 18 designated MRT stations in the city area completely free travel. Any of these early commuters who spend an extra five minutes in bed and exit at these stations between 7.45am and 8am will continue to be given a discount of up to 50 cents off their train fare. The project is part of the Singapore Government’s effort to try to alleviate the morning peak hour crowding situation on trains in the short term, even as rail capacity is being grown through new lines, additional trains and increased frequencies. To further aid this campaign, the LTA have been encouraging businesses and government ministries to enable their staff to enjoy flexible working hours. Mr Tan Hoe Soon, Director, Career Development and Management, Public Service Division, Prime Minister’s Office speaking on the launch of the campaign ;
“... we expect more officers to opt to start work earlier. For this to work, we need to be more accepting of flexible work practices. Managers must be mindful that officers who start work earlier should, correspondingly, be able to leave the office earlier. Work routines, such as meetings, will also have to factor this in.” Newly released data of commuters show that about 7% of commuters have shifted out of the morning peak period since the introduction of Free Pre-Peak Travel. This has resulted in a more even distribution of morning rail ridership. The ratio of morning peak (8am-9am) to pre-peak (7am-8am) travel (based on commuters exiting from the designated stations) has fallen from 2.7 to 2.1. In addition to the free rides, the LTA has been offering a number of additional activities to promote pre-peak travel, including free breakfast vouchers for these early risers.Nice hardware selection included (4) Product is as described (4) Could be hard to install (3) Difficult to determine the correct size.
This product is great. Easy to install with household tools. Works as good if not better then expected Yes review was helpful | No review was not helpfulwell worth it easy to install I had bought a lift kit from an auto parts store with no directions and could not get them to work, ordered a set from Camping World with directions, for half the price, and they workThe directions were right on!! The lift kit really enhances our storage in the bedroom of our new camper!! Buy smaller than you need I bought the standard because my bed platform fit the smallest criteria of the standard. I couldn't get the shocks to compress after installation, even putting all of my 220 pounds on the raised platform. I replaced the struts with 40 pounders and it now works fine. These are about 3x less pressure than those with the kit. Mine is now easy to lift, but would need about 60 pounds to hold it open. Pros: Product is as described, Nice hardware selection included
This makes us have much more storage space My husband installed these recently to our Queen (short) bed. He had watched the video, so it was fairly easy to install. Before this was installed, I didn't keep anything under the bed. It was too hard to open and put something in the space. We are packing the camper for a month trip and I'm so excited about having easy access to the extra space. There is so much space under the bed that I wouldn't have used if it hadn't been for these. You do have to hold the board up for a few seconds before it will stay up, but that doesn't bother me at all. Great add to our new trailer I purchased this lift kit to put under our queen sized bed. The camper we purchased didn't come with a bed lift standard as did many of the competing models we looked at. It took about 30 minutes to install but I did have to fabricate some wooden attach points to fit the recommended distances in the instructions. If you are even modestly handy you should be able to do it.
Deducted one star only because the opening distance could be better. I wish it would open just a few inches more. Overall, the documentation was clear and easy to follow and the product works as advertised.Now my wife can lift the bed (and it stays open) without my help which makes her happy and thus, makes me happy. Pros: Average fit, Product is as described, Nice hardware selection included Great kit but directions are not one size fits all Great kit was super excited when I opened up and all hardware and screws were included. The instructions are not one size fits all though. Expect to install extra blocking and depending on weight of mattress and hinged wood placement may vary. I am very impressed with the kit though! We could not live with out this in our Camper. This video will show you my before and after https://youtu.be/bAlnViifBCo I recently purchased a Heavy Bed Lift Kit by Hatchlift online from Camping World. The kit arrived in less than a week and I installed it on the following day.
I followed the instructions provided based on the size of my storage compartment, with a slight modification of additional side supports due to the light weight material used for the bed platform. The installation went very smooth and I was done in less than an hour. That’s when I ran into a problem. The bed would not close. The instructions stated the gas shocks would compress on their own from the weight of the bed and that they could not be closed manually. I tried to add more weight to the bed, still nothing moved. I contacted Hatchlift customer service and Garry concluded the heavy lift props were too large for my application and sent me the correct size. We couldn’t be happier, with the correct size for the application these work perfectly., Very good instructions. No review was not helpfulCoal gasification is an effective way to reduce the emission of CO2 and alleviate the global warming. The gasification can convert various carbon-based feed stocks to clean synthetic gases, mainly the mixture of H2 and CO, then they can be further used to produce other chemicals, or act as fuel to produce the electricity through Integrated Gasification Combined Cycle (IGCC).
The gasification is quite complex including many processes, such as the heating, pyrolysis, gasification, combustion, tar reforming etc, and in the traditional gasifiers all the processes happen in the same reactor. In order to improve the gasification efficiency and reduce the emission of pollutions, we proposed triple-bed combined circulating fluidized bed to decouple different processes, as seen in the figure below, so the processes can manipulated individually and further synthesized according to their different characteristics. Cheng Y. P., Lau D. Y. J., Guan G. Q., Fushimi C., Tsutsumi A., Wang C. H. Experimental and numerical studies on the electrostatics generation and transport in the triple-bed circulating fluidized bed. Industrial & Engineering Chemistry Research, 51: 14258-14267, 2012. Guan G. Q., Fushimi C., Ishizuka M., Nakamura Y., Tsutsumi A. Mstusda S., Suzuki Y., Hatano H., Cheng Y.P., Lim E. W. C., Wang C. H. Flow behaviors in the downer of a large-scale triple-bed combined circulating fluidized system with high solids mass fluxes.
Chemical Engineering Science, 66 (18): 4212-4220, 2011. In the triple-bed combined circulating fluidized bed, coal pyrolysis, gasification and combustion are separated and they will happen in the downer, bubbling fluidized and riser respectively. Coal is fed into the downer through the nozzles at the top of downer, after mixing with the hot circulating silica sand, coal will gain the heat and start the pyrolysis, through the gas-solid separator at the bottom of downer, the produced gases and tar are separated from the char, then the char enters the bubbling fluidized bed to be gasified with steam. The unreacted char flows downward to the bottom of riser, where it will be combusted with air and generate heat. The heat then will be transferred by inert silica sand to the downer and bubbling fluidized bed for coal pyrolysis and gasification. Figure 1 Triple-bed combined circulating fluidized bed Cheng Y.P., Guan G.Q., Lim E. W. C., Fushimi C., Ishizuka M., Wang C. H., Tsutsumi A. Numerical simulations and experiments on heat transfer around a probe in the downer reactor.
Powder Technology, 2012, 235: 359-367, 2013. The heat transfer performance of a downer reactor has great significance for coal gasification processes due to the very short residence time. In this study both experimental and numerical works were carried out to study heat transfer around a heating probe in a downer. Both experimental results and numerical results revealed that average heat transfer coefficients decreased with increasing superficial air velocity or decreasing solids mass flux, which could be attributed to decreasing solids holdup, as particle-particle convection was dominant in the heat transfer mechanism for the current cases. Numerical simulations also revealed that heat transfer may deteriorate with increasing particle size. Finally it was found that the heat transfer performance with constant temperature boundary condition around the probe was much better than that with constant heat flux boundary condition. These results may help us better understand heat transfer in downers for improving the design of downers with higher efficiencies.
Figure 2 Arrangement of heat transfer probe in the downer Figure 3 Comparison of experimental and numerical results Cheng Y.P., Lim E.W.C., Wang C.H., Guan G.Q., Nakamura Y., Ishizuka M., Fushimi C. and Tsutsumi A., Studies of solid-solid mixing behaviors in a downer reactor, AIChE annual meeting, Minneapolis, Minnesota, USA, 16-21, Oct. 2011. In the downer reactor, the silica sand (red) flows from the top and coal particles (black) are injected from the nozzles. As the residence time of particles in the downer is quite short, the mixing between coal and silica sand is very critical to achieve high pyrolysis efficiency. In our study, the Discrete Element Method coupled with Computational Fluid Dynamics is adopted to simulate the motions of silica sand and coal particles, and their mixing is characterized based on their motions, then the optimal injection nozzle arrangement and operating conditions are obtained. Figure 4 Coal (black) and silica sand (red) mixing in the downer
Cheng Y. P., Lim E. W. C., Wang C. H., Guan G. Q., Fushimi C., Ishizuka M., Tsutsumi A. Electrostatic characteristics in a large-scale triple-bed circulating fluidized system for coal gasification. Chemical Engineering Science, 75: 435-444, 2012. Electrostatics charge generation by triboelectrification has significant implications for the proper design and operation of a circulating fluidized bed. In this study, electrostatics in the fully developed regions of both the riser and downer of a large-scale triple-bed combined circulating fluidized bed was characterized in terms of the equivalent currents over the cross section of the developed region. The average equivalent currents and solids holdup were measured under different superficial velocities in the riser, downer and gas-sealing bed. It was found that in the fast fluidization regime in the riser, the negative equivalent currents were comparable with the positive equivalent currents due to the typical core-annulus flow pattern.
With increasing superficial velocities in the riser or in the gas-sealing bed, the flow pattern would approach dilute phase transport or dense suspension upflow regime. Thus, the positive equivalent currents became dominant because the backflow of sand particles were greatly suppressed. Some dominant frequencies for the equivalent currents in the riser were almost identical regardless of the magnitude of superficial velocities in the riser and the gas-sealing bed, indicating that they were determined by the inherent characteristics of electrostatics and/or signal noise, and were not affected by gas�Csolids flow behaviors. The frequencies in the downer were focused on the low value range, and the dominant frequencies were nearly zero. Both the solids mass flux and solids holdup had significant influence on the average equivalent currents. With increasing superficial velocities in the gas-sealing bed, the average equivalent currents first increased and then approached a constant. This led to the same trend in variation of solids mass flux, as well as solids holdup.
With increasing air superficial velocities in the riser, the average equivalent currents in the riser increased, while the average equivalent currents decreased in the downer with increasing air superficial velocities in the downer. Figure 5 Large-scale triple-bed combined circulating fluidized bed for coal gasification Figure 6 Measurement with Modular Parametric Current Transfer (MPCT) W. B. Zhang, Y. P. Cheng, C. H. Wang, C. Wang, W. Q. Yang Investigation on Hydrodynamics of Triple-Bed Combined Circulating Fluidized Bed using Electrostatic Sensor and Electrical Capacitance Tomography, 9th European Congress of Chemical Engineering, World Forum, The Hagen, Netherlands, April 21-25, 2013. In the circulating fluidized bed, due to the frequent collisions and frictions between particle-particle and particle-wall, electrostatic charge is generated on the solid particles and walls. When charged particles move near the electrostatic electrodes, the charges are induced on the electrodes.