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• Создано: 23-03-22
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kidswaterproofjackets.com

Описание: kidswaterproofjackets.com Some wear only one jacket all winter. Others alternate between 2 or 3 jackets. It's important to consider the temperature (obviously) and what you intend to do with your ski jacket. For example, for an intense day of cross-country skiing, even if it's -20°C, you'll opt for a thin windproof coat. On the other hand, we'll usually prefer a long, thick and well-insulated jacket for an evening stroll in the city. WHAT KIND OF WINTER JACKET DO YOU NEED?Winter jacket can be devided into many kinds for different people or functions, such as Girls Winter Jackets, Boys Winter Jackets, Mens Winter Jackets, Ladies Winter Jackets, etc. There are three main types of winter jackets. To find the right one for you, think about the activities you plan on doing. Do you need a jacket for walking around town and going to work, or are you looking for something to wear in the backcountry? Technical jackets are the best choice for those looking for lightweight warmth that allows for full range of movement when engaging in outdoor activities. These jackets that are suitable not only for cold weather, but for various activities like skiing, ice climbing and mountaineering. These jackets will include more technical features like helmet-compatible hoods and pit-zips to increase airflow during high-intensity activities. Generally, technical jackets are more lightweight than casual around-town winter jackets, and will be more compressible and packable. Most technical jackets made for intense winter pursuits will feature a 3-layer (3L) construction. This term is most often associated with membranes like GORE-TEX that use a layering system to create durable waterproof shells, perfect for wearing on top when layering. More layers can sometimes mean more weight, so some technical jackets will be designed to reduce bulk and weight while maintaining total weather protection. Some coats are warm coats that are chic enough for the office, happy hour or a shopping trip downtown. These coats will be a bit longer and have features designed for added comfort like a larger hood - sometimes trimmed with fur - and lined pockets. Here, technical details are not particularly necessary because the winter coat will not be used for high intensity activities. Instead, the most crucial element when it comes to urban coats is thermal capacity. Some jackets look just as good in the city as they do on the slopes! They combine attractive style and functionality, with a number of technical details and a well thought-out design. Some offer, among other things, models designed for long days in the mountains, but that are warm enough for days spent in the city. In general, the jackets in this category will be waterproof and protect you well from difficult weather, while being sufficiently insulated. Another interesting detail is that it's often possible to get a quality jacket at a reasonable price. In addition, it's often a jacket that can be worn all winter long because of its versatility. POCKETS ARE PRACTICAL Pockets are an essential part of our winter jacket. Having secure and utilitarian pockets allows your coat to be functional and organized. Look for a jacket with an internal pocket that's compatible with an audio cable so you can move around while listening to the latest hits. This pocket can also hold your important cards if your wallet is too big to keep up with you on the slopes. For those looking for a technical winter jacket for mountaineering or backcountry skiing, check the location of the pockets and their depth. Pockets that are easily accessible and large enough can make all the difference. For clothes for other seasons like normal jacket and pants, there are also some differents design or function. For example, there are obvious special design for differnt people in clothes like Kids Jackets, Girls Jackets, Boys Jackets, Girls Pants, Boys Pants and so on.

Дата Публикации: 23-03-22

jinhaocooler.com

Описание: jinhaocooler.com Evaporator is an important component together with other major components in a refrigeration system such as compressor, condenser and expansion device. The reason for refrigeration is to remove heat from air, water or other substance. It is here that the liquid refrigerant is expanded and evaporated. It acts as a heat exchanger that transfers heat from the substance being cooled to a boiling temperature. Evaporator Construction Types There are three types of Cooler Evaporator. construction that are commonly being used today: Shell and Tube Type Evaporator and Plate Surface construction have the entire surface in contact with the evaporating refrigerant inside. Finned construction are bare-tube coils upon which fins(metal plates usually Aluminium) are being installed. A more detailed discussion on this type of design will be provided here. Finned Evap. The fins are added to the bare-tube to increase the heat transfer capability. They act as heat collector that pick up heat from the surrounding air and conduct it to the refrigerant inside the tube hence improving the efficiency in cooling the air of the surrounding. They are best used in the air-cooling space where the temperature is around 34°F. Having fins mean the surface area for heat transfer has been extended. This means that the finned coils can have more compact in design compared to the bare-tube type of similar capacity. In summary, finned coils help to reduce coil cost, size and weight. Thermal Contact and Fin Spacing Good thermal contact between the fins and tubes is a must to ensure efficient heat transfer. They can be soldered together. The other more practical method is to expand the fins by pressure such that they bite into the tube surface hence a good thermal contact is established.The spacing of the fin depend on the operating temperature of the coil. Low temperature application uses only 1 fin. In air conditioning application, 14-16 fins per inch may be used as long it is designed in such a way that frost does not accumulates in the coils.Excessive finning may reduce the capacity of the evap. by restricting the flow of air over the coil hence the design engineers must do a proper system calculation and simulation at design stage. Another essential part for a cooling system is a Condenser. In a cooling cycle of a refrigeration system, heat is absorbed by the vapor refrigerant in the evaporator followed by the compression of the refrigerant by the compressor. The high pressure and high temperature state of the vapor refrigerant is then converted to liquid at the cond. It is designed to condense effectively the compressed refrigerant vapor. There are basically three types of condensing unit depending on how the heat is removed by the condensing medium which is usually water, air or a combination of both. Air-Cooled types are usually used in the residential and small offices applications. They are used in small capacity systems below 20 tons. The advantages of using this design include not having to do water piping, not necessary to have water disposal system, saving in water costs and not much scaling problems caused by the mineral content of the water. It is also easier to install and has lower initial cost. There isn't much maintenance problems.The disadvantages are that it requires higher power per ton of refrigeration, has shorter compressor life and on days when most cooling is required, the least is available. The circulation of Air Cooled Condenser can be by natural convection or by forced convection (usually using blower or fan). Due to its limited capacity, natural convection is used in smaller applications such as freezers and refrigerators. In forced convection, air is circulated by using a fan or blower that pulls the atmospheric air through the finned coils. Internally, the refrigerant circulates through the coil and air flows across the outside of the tubes. For Water Cooled Condenser, there are 3 types commonly being used. They are shell and tube, shell and coil, and double tube. The most commonly used is the shell and tube type and are usually available from two tons up to couple of hundred tons. This design has lower power requirements per ton of refrigeration and the compressors can last longer compared to the air-cooled type. A water cooling tower is frequently used for higher capacity application. Except for these components, there are also some Condensing Unit needed for a refrigeration like Water Cooled Condensing Unit, Air Cooled Condensing Unit, Air Handling Unit, etc. 

Дата Публикации: 23-03-22

What is a Paper Tube?

Описание: What is a Paper Tube? Paper tubes consist of paper or paperboard sheet layers wound together to form strong, hollow, and usually cylindrical shapes. The paper layers are laminated or bonded together using adhesives. The wall thickness of the tube can vary depending on the number of layers wrapped during manufacturing. Paper tubes are also known as paper cores, paperboard tubes, paper cans, fiber drums, fiber tubes, paper tubing, wound tubes, composite cans, coreboard tubes, and cardboard tubes. While widely used everywhere, the term "cardboard tube" is a misnomer. Cardboard consists of three kraft layers with the central layer corrugated. Paper Tube Types and ShapesWhile paper tubes, paper cores and related products are all made from wound plies of paper or paperboard. Paper tubes or cores can be constructed from one, two or many plies of brown kraft paper or paperboard. The innermost layer or ply, the liner, and the outermost layer, the wrap, can consist of different materials (foil, film, etc.) or specialized paper. The specialized paper and materials can provide water resistance, graphics or labeling, or a specific color. The two main types of paper tubes and cores include spiral wound and convolute or parallel wound paper tubes. Convolute wound tubes are used in applications requiring high bend strength, crush resistance and dynamic strength. A spiral wound tube has the paper ply or plies wrapped around at an angle to the tube's axis. In convolute tubes, the outer two edges of the paper strip are wrapped parallel or at a 90-degree angle to the tube's axis. Paper tubes have thinner walls and are widely used as containers or packaging for products. A paper core is essentially a heavy-walled paper tube. The much thicker wall of paper cores enables their use in winding webs or sheets of flexible material into rolls in converting operations. Besides, a paper tube may require other accessories to help, such as Paper Angle Bead, Medical Tape Dispenser and Paper Stick Excpet for paper tube, another harder material is also widely used. It is Plastic Pipe, which can be devided into many types for different materials like PE Pipe, PVC Pipe and PP Pipe. Indoor plumbing has been around for centuries. As many things change over the years, so has the type of pipes that maintain your plumbing. For instance, if looking at the plumbing system of older homes versus newer ones, you may find galvanized pipes in one and PVC tubing in the other. And for older homes especially, galvanized pipes are an outdated plumbing method and that should be replaced as soon as possible. Advantages of Using Plastic Pipes Long Life Cycle One of the best benefits of plastic water pipes is longevity. Unlike metal pipes that rust and corrode over time, plastic pipes will not corrode, rust, or develop sediment buildup that can lead to bursting. Plastic pipes feature a longer life cycle when compared to metal linesIn addition to its inability to corrode and long-lasting capability, plastic tubing also is fairly cheaper than the standard metal pipes. Especially in recent years metal, primarily galvanized steel or copper pipe prices have skyrocketed.Plastic piping is typically constructed with low-cost, light-weight material in a factory setting. Not to mention, it's also fairly easy to transport, thus making them cheaper to manufacture. Energy Efficiency When it comes to the installation of plastic tubing, PVC pipes don't need insulation which makes them far less likely to lose heat or experience unwanted heat intrusion. In addition, they're more resistant to sweltering summer temperatures or the brutal cold of the winter. This means that they don't need condensation as well. Easy to InstallSince you don't have to worry about insulation, plastic water lines are ultra-easy to install. Typically, a plumber in Trenton, NJ will need a CPVC primer or some form of plumbing cement to glue the pipes together. And in just a few minutes, your pipes are ready to go. Similar to repairing a plastic pipe, you may need to cut out the damaged section of the pip and replace it using a few couplers, which takes no time.

Дата Публикации: 23-03-22

What is a dry cabinet?

Описание: What is a dry cabinet? A dry cabinet, also called dehumidifying cabinet or dry box, is a storage solution used to protect sensitive items from excess humidity. These devices are used across many industries, but they are particularly popular for sensitive camera equipment storage. The main issue dry cabinets serve to fight is fungal growth. Cameras and camera lenses are susceptible to fungus given the right conditions – darkness and excess humidity. Dry cabinets come in various shapes and sizes and there are different technollogies available. For example, there are Standard Dry Cabinet, Dry Nitrogen Cabinet, Baking Dry Cabinet, Optional Configuration or even Dry Cabinet Custom-made Solutions. As opposed to it's name, a dry cabinet's purpose is not to provide an environment devoid of any humidiy, as this might actually be detrimental to the equipment encased within. Much like a cigar humidor, the dry cabinet’s job is to maintain an optimal relative humidity. Most dry boxes are equipped with a hygrometer to allow you to check the humidity level inside. How does a dry cabinet work?Dry boxes can be broadly divided into two categories: active and passive. A passive model utilizes a dessicant inside an airtight sealed box, and typically offers limited control over the humidity level. These boxes require no electricity to operate, but need regular dessicant changes (or reactivation for multiple-use dessicant), especially when activelly used. Therefore, a passive dry box is a good solution when power consumption is an issue, for example in an off-the-grid application. For regular home use, an active dry cabinet is generally a simpler and more effective solution. The typical active dehumidifying cabinet is an enclosure with electronic humidity control that automatically maintains a stable relative humidity (RH) at a preset level. Simpler models usually feature a small Peltier element to condense and remove the air-bourne moisture. More advanced models operate using multi-porous molecular sieve desiccants with automatic regeneration mechanisms. Electronic Dry Cabinet is much more precise and reliable than passive models, but do require a constant power source. Do you need a dry cabinet?Whether or not you need a dry cabinet depends on your location, climate, gear and use patterns. Climate is generall the number one factor determining the need of such a device. If you live in a warm, humid climate like Southeast Asia or equatorial states, chances are a dehumidifying cabinet would be a wise purchase. Even the cooler temperate climate can provide enough moisture to cause trouble in the right conditions, especially in seaside areas.Usage patterns are the second most important factor when you consider a dry cabinet for your equipment. If you constantly use your gear, day in and day out, the chances of it developing moisture related issues is minimal even in a moderately humid climate. Having the cameras out in the open, in sunlight and air, would usually suffice to prevent fungal growth in all but the most extreme cases. On the other hand, if you find yourself storing your equipment for several months at a time, you might find a nasty surprise under a lens cap one day. The risk of fungus issues increases if you often work in wet, dewey conditions. In a humid environment, gear will accumulate moisture even if kept out of the rain. Putting away equipment in a dark, warm cabinet after such a shoot is a great way to grow some fungi. What is the optimum humidity for camera storage?Using a dry cabinet for camera storage is a straighforward process. The amount of work you have to do depends on the type of enclosure you are using. With an active dry box, the only thing you need to do is to set the desired humidity level and let the electronics do their work. Best humidiy level for camera storage is around 40-45%. If you are using a passive dry box, you need to add enough dessicant to keep the humidity close to these numbers.Too dry can be almost as bad as too humid, which is why using a dry box without means of controlling the actual relative humidity inside is a bad idea. Storing your gear in an enclosure with extremely low humidity will affect rubber parts, leatherette, certain plastics, lubricants and some electronic components. Electrostatic build up is also a danger when humidity is kept too low. 

Дата Публикации: 23-03-22

chinaturbokits.com

Описание: chinaturbokits.com WHAT IS A TURBOCHARGER AND HOW DOES IT WORK A turbocharger is a device fitted to a vehicle's engine that is designed to improve the overall efficiency and increase performance. This is the reason why many auto manufacturers are choosing to turbocharge their vehicles. The new Chevrolet Trax and Equinox are both offered with turbocharged engines and as time goes on, more and more vehicles will be fitted with them. Obviously,, different brands of vehicles need different kinds of turbocharger to fit, for example, there are Turbocharger for Audi, Turbocharger for Seat, Turbocharger for Skoda, Turbocharger for Volkswagen, Turbocharger for BMW, Turbocharger for Mercedes-Benz, Turbocharger for Toyota, Turbocharger for Volvo, Turbocharger for Hyundai, etc. How does it work?A turbo is made up of two halves joined together by a shaft. On one side, hot exhaust gasses spin the turbine that is connected to another turbine which sucks air in and compresses it into the engine. This compression is what gives the engine the extra power and efficiency because as more air can go in the combustion chamber, more fuel can be added for more power. Advantages In addition to the extra power, turbochargers are sometimes referred to as devices that offer "ree power" because unlike a supercharger, it does not require the engine's power to drive it. The hot and expanding gasses coming out of the engine are what power a turbocharger so there is no drain of the engine's net power. Turbocharged engines are also not affected in the same way as naturally aspirated engines are when they go at higher altitudes. The higher in altitude a naturally aspirated engine climbs, the harder it becomes for it to get oxygen due to the thinning atmosphere. A turbocharger gets around this problem because it forces the oxygen into the engine's combustion chamber, sometimes at 2 times the pressure of the atmosphere. Turbochargers also improve the fuel efficiency of a vehicle however there is a misconception when it comes to turbocharged vehicles and fuel efficiency. Taking a naturally aspirated engine and slapping on a turbocharger on it will not improve fuel efficiency. The way that manufacturers improve fuel efficiency though turbocharging is by down-sizing an engine and then turbocharging it. For example, take a 2.5L inline-4 cylinder naturally aspirated engine and decrease the displacement to 1.4L and then turbocharger it. The smaller, turbocharged engine would still have the same performance figures (or slightly better) but because of the smaller displacement, it would also use less fuel. DisadvantagesTurbochargers have 2 main disadvantages when compared to a naturally aspirated or supercharged engine. Firstly is heat. Because a turbo is powered by hot exhaust gasses, it gets very hot. Sometimes under certain engine conditions, the turbocharger itself could start glowing red but of course this doesn't happen in everyday driving conditions; it happens when the engine is pushed to its limits for a continuous amount of time. This is why you see some turbocharged sports cars with vents in the hood or down the side, it's to try to get air moving through the engine bay and keep things cool. The other big disadvantage of a turbocharger is something called turbo lag. Under certain conditions, whenever you put your foot down on the throttle, there is a delay between the time you demand power from the engine and the moment you actually start to feel it. That is turbo lag. When the engine's speed is low, there isn't a lot of exhaust gasses passing through the turbocharger so when you do demand power from the engine, the turbocharger turbine needs time to start spinning at an optimal speed. The effects of this can be reduced by downshifting to a lower gear but keen drivers can still sometimes notice the split delay in response. So the next time you're in a GM showroom, don't overlook the turbocharged vehicles. They offer the same or more power as V6 or sometimes even V8 counterparts and they usually have better fuel economy due to the smaller displacement engine and less weight.

Дата Публикации: 23-03-22

chinaflasks.com

Описание: chinaflasks.com A thermos is referred to as a small appliance designed for keeping hot things hot and cold things cold for quite a reasonable period of time. Thermos vacuum flask is useful for those who travel a lot as they can use it to keep some coffee or other food items. A Vacuum Thermos Flask has very good capacity to hold very cold liquids such as liquid nitrogen for a substantial length of time. Except vacuum flask, there are other types of thermos, such as Stainless Steel Vacuum Bottle, Stainless Steel Cola Bottle, Stainless Steel Vacuum Flask, Stainless Steel Vacuum Space Pot, Vacuum Pot, Stainless Steel Mug, Stainless Steel Vacuum Mug, etc. How Thermos WorkA thermos doesn't give heat room for heat transfer by any of the three ways including convection, conduction, and radiation, which heat can travel. It is the silver coating located on the internal surface of the thermos that puts a stop to heat transfer by radiation, while the vacuum connecting its double wall avoids heat moving by convection. The thinness of the glass walls prevents heat from leaving or entering the thermos by conduction. Furthermore, the casing surrounding the thermos flask offers added insulation. What about radiation? As soon as infrared radiation makes an effort to disappear from the hot liquid, the reflective lining of the inner chamber returns it back in again instantly. As a matter of fact, there is practically no way heat can break out from a thermos and a hot drink stored inside will remain steaming hot for several hours. Thermos used extensively in technology, medicine, and science for storing food and drink. Since thermos is the way to transport samples of human tissue, insulin, and donor organs, it is the extremely advantageous in medicine. On the other hand, it is advantageous in aircraft instrumentation and also as an equipment to observe the weather. Thermos is notable among office workers, nursing mothers, travelers and many other people. Discussed here are some other advantages associated with using thermos.Preservation of hot food Items – Thermos is very useful for keeping tea or coffee hot in winters. It is used to savor the original taste of your food item, tea or coffee. Thermos is insulated and can be of great help any time any day. Keeping Cold Water Cold Thermos is not only used to keep things hot, it is also used to keep cold thing cold for hours. Consequently, in a hot weather condition, thermos is the perfect choice to keep your cold drinks cold all day long. Irrespective of wherever you are going, you can use a thermos to carry your food along. You can use thermos to pack your children's lunch, or your own launch to the office. Whatever you pack in the thermos will remain hot and fresh for several hours because it makes use of a doubled layered, vacuum insulation design that offers extraordinary temperature retention. No matter the kind of food you stored in the thermos and the time you wish to enjoy the food, it remains fresh and tasty. There has been an explosion in hydration technology over the last decade, resulting in ever more advanced vessels from which to consume our favorite beverages. Vacuum Bottles are the pinnacle product in the personal-hydration market, even becoming a minor status symbol in some cases. They keep liquids hot or cold, don't sweat from condensation, and won't transfer heat or cold to your hand. Double-walled water bottles aren't cheap, but their advantages outweigh the nominal increase in cost. Here are three additional reasons to consider one as your next water bottle. Non-ToxicThe industrial chemical bisphenol A. (BPA) has been used to make plastic products of all kinds since the 1960s. Ever since the dangers of BPAs became widely understood, water bottle manufacturers have moved away from plastics containing BPA and towards other materials, including glass and steel. Vacuum insulated water bottles made of 18/8 food-grade stainless steel strike the best balance between toxin-free construction and durability. Multiple lids If you are going to pay a premium price for something as mundane as a water bottle, you might as well get the most versatile one possible. Look for a bottle sold with two lids. One should be a leak-free, airtight top for maximum thermal retention, and the other should incorporate a folding straw meant for quick sips when hiking, riding, climbing, or paddling. No Flavor TransferIn addition to keeping your beverage either hot or cold, a vacuum insulated water bottle made of stainless steel eliminates the transfer of flavor from one beverage to another. Your juice will taste like juice, your soda will taste soda, and water will taste like water. 

Дата Публикации: 23-03-22

yasesteesoaps.com

Описание: yasesteesoaps.com Soap is a salt of a fatty acid used in a variety of cleansing and lubricating products. In a domestic setting, soaps are surfactants usually used for washing, bathing, and other types of housekeeping. In industrial settings, soaps are used as thickeners, components of some lubricants, and precursors to catalysts. When used for cleaning, soap solubilizes particles and grime, which can then be separated from the article being cleaned. In hand washing, as a surfactant, when lathered with a little water, soap kills microorganisms by disorganizing their membrane lipid bilayer and denaturing their proteins. It also emulsifies oils, enabling them to be carried away by running water. Soaps are sodium or potassium fatty acids salts, produced from the hydrolysis of fats in a chemical reaction called saponification. Each soap molecule has a long hydrocarbon chain, sometimes called its 'tail', with a carboxylate 'head'. In water, the sodium or potassium ions float free, leaving a negatively-charged head. How Soap CleansSoap is an excellent cleanser because of its ability to act as an emulsifying agent. An emulsifier is capable of dispersing one liquid into another immiscible liquid. This means that while oil (which attracts dirt) doesn't naturally mix with water, soap can suspend oil/dirt in such a way that it can be removed. The organic part of natural soap is a negatively-charged, polar molecule. Its hydrophilic (water-loving) carboxylate group (-CO2) interacts with water molecules via ion-dipole interactions and hydrogen bonding. The hydrophobic (water-fearing) part of a soap molecule, its long, nonpolar hydrocarbon chain, does not interact with water molecules. The hydrocarbon chains are attracted to each other by dispersion forces and cluster together, forming structures called micelles. In these micelles, the carboxylate groups form a negatively-charged spherical surface, with the hydrocarbon chains inside the sphere. Because they are negatively charged, soap micelles repel each other and remain dispersed in water. Grease and oil are nonpolar and insoluble in water. When soap and soiling oils are mixed, the nonpolar hydrocarbon portion of the micelles break up the nonpolar oil molecules. A different type of micelle then forms, with nonpolar soiling molecules in the center. Thus, grease and oil and the 'dirt' attached to them are caught inside the micelle and can be rinsed away. The Disadvantage of Soap Although soaps are excellent cleansers, they do have disadvantages. As salts of weak acids, they are converted by mineral acids into free fatty acids. These fatty acids are less soluble than the sodium or potassium salts and form a precipitate or soap scum. Because of this, soaps are ineffective in acidic water. Also, soaps form insoluble salts in hard water, such as water containing magnesium, calcium, or iron. mThe insoluble salts form bathtub rings, leave films that reduce hair luster, and gray/roughen textiles after repeated washings. Soap can be a nice parnter for body cleaning, and it is mainly used as a Bath Soap or a Laundry Soap. For our skin, Handmade Soap is much milder and more suitable. Don't forget to prepare a Box Case for it. Also, for body cleaning, you win't miss a great Toothpaste, facial cleanser and our Body Butter and face cream. For babies, you may perpare the special cream and cleanser designed for babies and the Diapers. 

Дата Публикации: 23-03-22