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What are the disadvantages and advantages of air drying?
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What are the advantages and disadvantages of an air cooler?
Some advantages to an air cooler include:Cooler temperaturesComfortSome disadvantages to an air cooler include: Uses electricityNoise pollutionBigger expenseTakes up space
What are the advantages and disadvantages of public distribution of India?
1. air born diseases are caused by overpopulation
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.
What are the advantages and disadvantages for tides energy?
no air pollution
What are the advantages and disadvantages of living in rural area?
fresh air
What are the disadvantages of air drying?
Air drying can be slower than using a machine dryer, which means it may take longer for items to dry completely. In humid climates, air drying may not be as effective because the air is already moisture-laden, prolonging drying times. Additionally, air drying may not be suitable for all types of materials, such as delicate fabrics that could be damaged by hanging or stretching.
What are the advantages and Disadvantages of Air brakes on train?
working of burners in ntpc
What are the advantages disadvantages of road transport?
Advantages : 1. We can travel any where we went. 2.It is fairly cheap as compared to air travel. Disadvantages: 1.It is slow as compared to air travel. 2.There is alot of traffic from which we get late.
What is sun drying air drying?
what are the example of sun and air drying
What are the advantages and disadvantages of air rifle hunting?
One of the main advantages of air rifle hunting is that it's easy to use, gives you cheap practice and is also good for hunting small game. One of the main disadvantages or air rifle hunting is the fluctuation of pressure in relation to ambient air temperature.
What are the advantages and disadvantages of the air conditioner?
An advantage of an air conditioner is that people will not be hot in the summer. A disadvantage is that it will raise the electricity bill.
