0
the speed at which drying occurs
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Why vaccume is given during loss on drying?
Becouse in some of the substance cantain high boiling point solvent, which is not dry easily ,but when we applied vaccume during the drying in oven which decrese the boiling point and increase the rate of evaporation.
What is sun drying air drying?
what are the example of sun and air drying
Does Japan dryer work with polyurethane?
No. Japan Dryer was designed to accelerate the drying rate of oil based products, not synthetic based products. Read the instructions and use the recommended amount.
Is rock salt a drying agent?
Sodium chloride is not used in laboratory as a drying agent.
What is safe reliable method of drying the crystals?
You can use air drying, an oven or an exsicator.
Formula for calculating drying rate?
Drying rate is not constant throughout the drying process. Drying rate generally decreases with the decrease of free moisture content. ( water in food is present in different forms; bound and unbound.Its easy to remove unbound moisture. In a drying curve, there's a constant rate drying period and a falling rate drying period. Depending on the equilibrium moisture content, critical moisture content and the final moisture content there are different formulas for calculating drying rates.
Does the drying rate vary with different fabrics?
The drying rate varies with different fabrics because these fabrics vary in the absorbency. Materials that absorb more liquid tend to take the longest to dry.
Why vaccume is given during loss on drying?
Becouse in some of the substance cantain high boiling point solvent, which is not dry easily ,but when we applied vaccume during the drying in oven which decrese the boiling point and increase the rate of evaporation.
What are the methods of drying?
Drying what?
What is sun drying air drying?
what are the example of sun and air drying
What are the three basic methods of drying?
Sun drying,Heat drying,
What are the different types of seasoning timber?
Seasoning of timberSeasoning is the name given to the methods of drying timberThere are two methods by which timber can be dried:(i) natural drying or air drying, and(ii) artificial drying.Air dryingAir-drying is the drying of timber by exposing it to the air. The technique of air-drying consists mainly of making a stack of sawn timber (with the layers of boards separated by stickers) on raised foundations, in a clean, cool, dry and shady place. Rate of drying largely depends on climatic conditions, and on the air movement (exposure to the wind). For successful air-drying, a continuous and uniform flow of air throughout the pile of the timber needs to be arranged. Coating the planks with any substance that is relatively impermeable to moisture can control the rate of loss of moisture; ordinary mineral oil is usually quite effective. Coating the ends of logs with oil or thick paint, improves their quality upon drying. Wrapping planks or logs in materials, which will allow some movement of moisture, generally works very well provided the wood is first treated against fungal infection by coating in petrol/gasoline or oil. Mineral oil will generally not soak in more than 1-2 mm below the surface and is easily removed by planning when the timber is suitably dry.Natural seasoning of timberKiln dryingThe process of kiln drying consists basically of introducing heat. This may be directly, using natural gas and/or electricity or indirectly, through steam-heated heat exchangers, although solar energy is also possible. In the process, deliberate control of temperature, relative humidity and air circulation is provided to give conditions at various stages (moisture contents or times) of drying the timber to achieve effective drying. For this purpose, the timber is stacked in chambers, called wood drying kilns, which are fitted with equipment for manipulation and control of the temperature and the relative humidity of the drying air and its circulation rate through the timber stackKiln drying provides a means of overcoming the limitations imposed by erratic weather conditions. In kiln drying as in air drying, unsaturated air is used as the drying medium. Almost all commercial timbers of the world are dried in industrial kilns. A comparison of air drying, conventional kiln and solar drying is given below:1. Timber can be dried to any desired low moisture content by conventional or solar kiln drying, but in air drying, moisture contents of less than 18% are difficult to attain for most locations.2. The drying times are considerably less in conventional kiln drying than in solar kiln drying, followed by air-drying.1. This means that if capital outlay is involved, this capital is just sitting there for a longer time when air-drying is used. On the other hand, installing an industrial kiln, to say nothing of maintenance and operation, is expensive.2. In addition, wood that is being air-dried takes up space, which could also cost money.3. In air-drying, there is little control over the drying elements, so drying degrade cannot be controlled.Air-drying is the drying of timber by exposing it to the air. The technique of air-drying consists mainly of making a stack of sawn timber (with the layers of boards separated by stickers) on raised foundations, in a clean, cool, dry and shady place. Rate of drying largely depends on climatic conditions, and on the air movement (exposure to the wind). For successful air-drying, a continuous and uniform flow of air throughout the pile of the timber needs to be arranged. Coating the planks with any substance that is relatively impermeable to moisture can control the rate of loss of moisture; ordinary mineral oil is usually quite effective. Coating the ends of logs with oil or thick paint, improves their quality upon drying. Wrapping planks or logs in materials, which will allow some movement of moisture, generally works very well provided the wood is first treated against fungal infection by coating in petrol/gasoline or oil. Mineral oil will generally not soak in more than 1-2 mm below the surface and is easily removed by planning when the timber is suitably dry.Natural seasoning of timberKiln dryingThe process of kiln drying consists basically of introducing heat. This may be directly, using natural gas and/or electricity or indirectly, through steam-heated heat exchangers, although solar energy is also possible. In the process, deliberate control of temperature, relative humidity and air circulation is provided to give conditions at various stages (moisture contents or times) of drying the timber to achieve effective drying. For this purpose, the timber is stacked in chambers, called wood drying kilns, which are fitted with equipment for manipulation and control of the temperature and the relative humidity of the drying air and its circulation rate through the timber stackKiln drying provides a means of overcoming the limitations imposed by erratic weather conditions. In kiln drying as in air drying, unsaturated air is used as the drying medium. Almost all commercial timbers of the world are dried in industrial kilns. A comparison of air drying, conventional kiln and solar drying is given below:1. Timber can be dried to any desired low moisture content by conventional or solar kiln drying, but in air drying, moisture contents of less than 18% are difficult to attain for most locations.2. The drying times are considerably less in conventional kiln drying than in solar kiln drying, followed by air-drying.1. This means that if capital outlay is involved, this capital is just sitting there for a longer time when air-drying is used. On the other hand, installing an industrial kiln, to say nothing of maintenance and operation, is expensive.2. In addition, wood that is being air-dried takes up space, which could also cost money.3. In air-drying, there is little control over the drying elements, so drying degrade cannot be controlled.
How do you write a writeup on sundrying?
When you do a writeup on sun drying fruits and vegetables be sure to include information on how to prepare them for drying, such as do you peel tomatoes for drying or not, how to avoid insects from getting on you drying screens, and how to store and use them after drying.
A body preserved by drying?
a body preserved by drying
How can a hydrate be turned into an anhydrate?
By drying, heating, vacuum drying
What is quick drying paint called?
Quick-Drying Paint
What effect can be achieved with finger drying hair?
How do you finger drying
