Sprinkler systems part2

Distributor Johnson Control Indonesia – The working principle of the theory of fire sprinkler utilizes compartment (SFPE Handbook of Fire Protection Engineering, 3rd Edition, 2002). Fire on the floor will make the room air entrainment of smoke and float to the top, called plume. When the plume strikes the ceiling, then a hot air flow radially at or near the ceiling. The hot air flow is called the ceiling jet and occurs at a maximum thickness of 30 cm from the ceiling.

Gambar terkait

When the jet ceiling sprinkler heads then there is the convective heat transfer from the ceiling jet to heat the sensor element sprinkler (fusible link or glass bulb) which causes the temperature to rise from the previous same as the temperature of the room. This heat sensor element has a nominal working temperature varying from 57 ° C s / d 343 ° C, can be selected for each depending on the design of a fire hazard occupancy.

Sprinkler heads will operate when the temperature of the heat sensor element has climbed to a nominal working temperature. For residential apartments, commonly used nominal temperature of 57 ° C or 68 ° C. The operating principle is exactly the same sprinkler operating principle of a thermal detector such as that used in the detection and alarm system. Therefore, when the building was protected by a sprinkler then no longer need to be equipped with a heat detector and only need to be equipped with smoke detectors.

If the fire continues, then in the room / compartment will form two layers, namely, (a) the smoke layer above, and (b) non-relative layer underneath. The temperature and the thickness of the smoke will rise and continue to grow as long as there is a fire. While the temperature of the smoke-free layer beneath it is relatively the same as the temperature of the room.

At the time of sprinkler operation, the temperature of the room (not the temperature of the flame) is relatively unchanged or increase is not great, unless there is a failure of the sprinkler system so the fire is not extinguished and the smoke layer will continue to fall to the floor. It can be predicted by the simulation program fires in compartments (CFast and ASSET Program).

Although the percentage is very small sprinkler failure than success, sprinkler can fail mainly due to the following reasons, first, the design error, Haras sprinkler systems designed in accordance with the level of risk of fire building. For example, a building with residential apartments above and paserba on the podium, has a different hazard, so the design was different densities.

Second, installation errors, execution in the field kuang, for example, the position of the sprinkler head on the ceiling and obstacles (column and beam structure) does not meet the installation requirements thus greatly reducing the performance of the sprinkler. Third, the absence of a program of inspection, testing and periodic maintenance of appropriate standards (NFPA 25), resulting in the system does not operate when required if there is a fire.

And fourth, the characteristics of the building as an open architecture so that the floor is open to the outside air, and compartments that do not have a fire resistance (from combustible material wood and others). These characteristics affect the performance of the sprinkler system.

Sprinklers is a system used to extinguish a fire at a building. Sprinkler will automatically turn on when a fire occurs.

Things that should be considered in the planning system of fire sprinkler:

• The system type and function of a fire hazard
• Calculation of hydraulic every type of dwelling (fire hazard light Q = 225 l / min, p = 2.2 kg / cm2; the fire hazard was Q = 375 – 1100 l / min, p = 1.0 – 1.7 kg / cm2; severe fire hazard Q = 2300-4550 l / min, p = 1.8 – 7.3 kg / cm2).
• The density of the emission and the maximum work estimated
• The water supply system
• Placement and location of sprinkler heads
• type sprinkler head (57 0C-orange, 68 0C-red, 79 0C-yellow, 93 0C-green, 141 0C-blue, 182 0C violet, 203/260 0C-black).

While the maximum number of sprinkler heads which can be mounted on a control valve for a fire hazard light system (considering our topic is the analysis of the hotel) was 500 pieces of the sprinkler head. Supplies alarms for the sprinkler system should consist of a control valve alarm (the alarm control valve) or a flow detection device (flow switch) are justified with the necessary equipment to provide a warning signal.

SPRINKLER CLASSIFICATION
sprinkler system consists of three classifications in accordance with the classification of residential fire hazard, namely:
1. The system is light a fire hazard
Density planned emission 2:25 mm / min, with an estimated maximum work area: 84 m2, while the lighter types of residential fires, among others such as office buildings, housing, education, hospitality, hospitals and others.

2. Systems fire hazard being
Density jets planned 5 mm / min, with an estimated maximum work area: 72-360 m2, while including the types of residential fires are: light industry such as: dairies, electronics, canning, textile, cigarettes , keremik, metal processing, auto repair shops and others.

3. System of severe fire danger
for the industrial process emission density of the planned 7.5 – 12.5 mm / min, with an estimated maximum work area is 260 m2, while the danger in high-density warehouses planned accumulation of 7.5 – 30 mm / min. Work area maximum estimated 260-300 m2 with a density of jets planned for hazards on building hoarding high depending on the nature of the danger of the goods stored, as for the kind of residential fires are the heavy industries such as: chemical plants, lighters, explosives, rubber foam, oil refineries, and others.

Official Android Lollipop Plana Even on Galaxy Note 3 Neo

Official Android Lollipop Plana Even on Galaxy Note 3 Neo

Who knows if it will be the last of the ‘survivors’. In any case, the news will please purists of Samsung and of course the owners of Galaxy Note 3 Neo, one out smartphone with Android 4.3 Jelly Bean, KitKat will also see that after upgrading to Android Lollipop (it is unknown whether 5.0 or 5.1) .

The confirmation of the imminent update to Android Lollipop for Galaxy Note 3 Neo came from Samsung UK on Twitter, in response to a user’s specific request, who asked for clarification about the device upgrade to Android Lollipop (in the post is done mention of Galaxy S3, cut off from the list of updates).

The finding of Samsung UK has confirmed the update for the Samsung Galaxy Note 3 Neo much to recommend a manual search of the upgrade on your smartphone.

In any case, it is very unlikely that the owners of a Samsung Galaxy Note 3 Neo might receive the update of the operating system Android Lollipop during August http://smilesmultimedia.com. For all information on the device Samsung officially updated (with roll out in the course or run) the advice is always to check

Cosi ‘fan tutte even after Facebook, news on Twitter

A rise in shares val well a change. even epochal, even conceptual news also comes on Twitter, just as we did already for Facebook. And ‘the site Buzzfeed, to anticipate the new strategy of Twitter, which is pioneering in applications for iOS and Android a section dedicated to news with topical titles in the foreground, followed by themed tweets.

The goal of Twitter is clear to focus also on information to re-launch at a time of great pressure. The new experiment (already active in Japan and at the start time in the US), which was confirmed, aims to make the content easy to find and enjoy the microblog.

The new section to the Twitter news puts emphasis on the re-launched or discussed topical headlines on Twitter at any given time. When users click on the titles will open a new page with the text of the news, photos and any major tweet on the subject.

Then there is the second part of the installation it must choose language, edition, and architecture of the operating system remember that those who upgraded from Windows 7 and 8.1 Home should have only the Home version of W10, while those who have Windows 7 Ultimate and Windows 8.1 Pro receives W10 Pro.

Best Cheap Smartphones 2016 Samsung Galaxy A3 And A5 (2016)

Best Cheap Smartphones 2016 Samsung Galaxy A3 And A5 (2016)

cost smartphone

The highlight of these two devices is to offer a design and a premium build quality, top of the range, at a price that is rather cheap smartphone. The look is made of aluminum for the frame and glass for the rear shell, it is very elegant and makes it one of the most compact smartphones on the market. Excellent 4.7-inch display with HD resolution, which has the Super AMOLED technology and has a definition and a very good color rendition. There are very few displays of this size on modern smartphones, and this is one of the few that you can also use comfortably with one hand.

Among the hardware we have a quad core Exynos 7580 1.5 GHz frequency, 1.5 GB of RAM and 16 GB of internal storage expandable up to 128 GB. Although the hardware is not high end we have an excellent fluidity and optimized with the TouchWiz interface https://teknorus.com. They make their terrible figure, excuse the term, even cameras from 1305 megapixel shots with rich functionality and acceptable in all lighting conditions. We also have many features for the shots that manage to improve yield and increase usage scenarios. More than the standard also the autonomy of 2300 mAh battery, which comes with any use at the end of the day and beyond.

With Galaxy A5 (2016) greatly enhances the hardware side first of all we have a Full HD display. This goes to make this terminal a little ‘less compact, yet provides extremely sharp images and colors to scare. In addition we have an octa-core 1.6 Ghz processor and 2 GB of RAM. Improve performance and optimization, with good fluidity and the important feature that allows you to create two windows to use two applications at the same time. Very even more powerful battery which here reaches 2,900 mAh. Autonomy is beyond expectation for a capacity like that, as with any use you can get past the endurance day. If you do not strive this device and you might even last the beauty of two days. This is therefore one of the most complete and balanced budget smartphone.

Samsung Galaxy A3 (2016)

PRO advanced camera Build quality from top range, excellent screen performance, autonomy more than sufficient

CONS The design levitates the price

Samsung Galaxy A5 (2016)

PRO Design Premium, camera in top-end, outstanding, satisfactory autonomy display

CONS Price above average, nothing Notification LED

This is how a hacker has managed to steal more than 100 million dollars from Google and Facebook

google

Do you think you take all necessary steps to stay safe on the Internet? If the answer is yes, I have bad news for you. Google and Facebook, two of the world’s most important technology companies on the planet, will most likely rely on the most secure and advanced security methods available and have lost more than $ 100 million Hacker who has been attacking both companies … for two years.

Of course, you ask yourself: how is this possible? As we are told from Fortune, both companies have been victims of a phishing attack that has caused them losses of a few million dollars, which have gone to the bank account of a citizen of Lithuania.

Even Google and Facebook are safe from phishing

Although it was last month when US authorities identified the attacker, Evaldas Rimasauskas, a 40-year-old Lithuanian citizen, it has not been so far when it has been discovered that among the companies affected by the Rimasauskas attacks, the names of these two Technological giants.

In order to carry out the attacks, ** the hacker was responsible for creating e-mail addresses, invoices and corporate seals to impersonate a large Asian manufacturer ** who, on a regular basis, did business with the two affected companies. Thus, during these two years, this hacker has managed to receive a sum of money that exceeds 100 million dollars without anyone suspecting the least. Of course, Rimasauskas has denied the facts.

Although today, both Facebook and Google have already recovered funds lost due to the attacks, this is further evidence that ** and each of us can be victims of Internet fraud **, however advanced that Be the techniques and safety methods used.

These are the 4 best Chinese mobile phones you can get with discount

4 best Chinese mobile phones

Luckily for all those who are excited by the world of telephony, many companies, many from China, have burst onto the market. ** These are making things quite difficult for traditional manufacturers, especially in China. The mid-range.

But this past 2016 we have found that these same manufacturers have also put in trouble – not economically – companies like Samsung, Apple or LG. And is that it is no secret that terminals like the OnePlus 3T have nothing to envy other flagships like the Galaxy S7. So we have decided to collect 4 of the best high-end Chinese mobile phones that you can buy at a discount and compete from you to you with the Apple and Samsung terminals.

Xiaomi Mi 5s

First we have the Xiaomi Mi 5s, the renewal of last year’s flagship of the Chinese company, which has a Qualcomm Snapdragon 821 and 4 GB of RAM, little more to say so that you get an idea of the good Performance of the terminal. Available in white, with metallic finishes and a 5.15 inch screen, it is the smallest smartphone you will find in this compilation.

OnePlus 3T

The OnePlus 3T is possibly the best smartphone of 2016, it has everything: good autonomy, a good photographic section and a hardware capable of moving any application – 6 GB of RAM and a 821 Snapdragon. Definitely a great option if you are looking for a smartphone with pure Android and it will be updated constantly.

Huawei Mate 9

Third is the Huawei Mate 9, a large phone with a huge 5.9-inch screen. Yes, it’s a big thing, but it’s all getting used to it. Regarding hardware, it incorporates a Kirin 960 – which implies a very good battery management – accompanied by 4 GB of RAM. All together with a fairly good photographic section, of which his double camera stands out.

Xiaomi My Mix

Finally, the Xiaomi Mi Mix, which was one of the first terminals to incorporate design lines characterized by the great use of the front by the screen. But since everything is not based on aesthetics, the Mi Mix incorporates a Qualcomm Snapdragon 821 and 6 GB of RAM, incredible hardware, although we could ask for something more to your rear camera that, despite being good, is not a The height of others, such as the S7.