DRYERS FOR AGRICULTURAL PRODUCTS USING SOLAR ENERGY
VINASAY, Vietnam is a pioneer and market leader in commercializing solar dryer technology for a variety of agricultural products. Our Poly Carbonate Solar Dryers are available in a variety of capacities, ranging from small household applications to large commercial applications.
We present a brief overview of Solar Drying Technology and its general characteristics in order to make the subject more understandable.
Drying is the process of removing moisture from food in order to prevent biochemical reactions and microbial growth. Drying extends the shelf life of the product, allowing it to be sold during the off-season.
Drying is one of the earliest methods of agricultural product preservation. The drying process requires approximately 2.4 MJ of energy to evaporate one litre of water. Most of our food crops are 80–90% water, and the majority of this water must be removed prior to long-term storage. In practice, the majority of dryers used are less than 50% efficient, indicating that significant amounts of energy are consumed during this post-harvest activity.
Sun drying agricultural products in the open air is a traditional method used in the majority of developing countries. The term "sun drying" refers to the process of exposing a commodity to direct solar radiation and the convective force of natural wind. Drying is the most cost-effective and widely used method of preserving and storing agricultural products.
Certain new techniques for efficient drying processes, such as hot air drying or dielectric heating, have been introduced. However, these processes consume a great deal of energy, which is typically derived from conventional energy sources such as fossil fuels. Due to the depletion of fossil fuels and the subsequent increase in energy prices, an increasing emphasis is being placed on the use of renewable energy sources for drying.
Drying the product at an optimal temperature is critical, but other factors such as contamination with foreign bodies, chemicals, dust, and bacteria are also critical.
The following criteria must be met in order to classify a solar dryer:
- Mode of air movement
- Exposure to insulation
- Direction of airflow
- Arrangement of the dryer
- Solar contribution
- Type of fruit to be dried
Solar drying systems have been developed as a viable and cost-effective method of agricultural product drying. Solar drying is accomplished through direct sunlight and the greenhouse effect. Solar energy received by the drying chamber is dependent on the amount of sunshine, the climate, the weather, the clarity of the atmosphere, and the location.
On a clear day, the amount of solar radiation available to any location is determined by the sun's angle relative to the horizon. Solar energy is a zero-cost, renewable, abundant, and environmentally friendly source of energy.
Solar dryers face two fundamental limitations: sunlight hours and weather change.
Polycarbonate Solar Dryers: These are solar dryers that are directly irradiated, meaning the products absorb solar energy directly through the polycarbonate sheet. Direct solar radiation heats and dries the upper layer, while conduction heats and dries the subsequent layers. Solar natural dryers include polyhouse or greenhouse drying. Due to the fact that the drying process is weather and sunlight dependent, a constant drying temperature cannot be maintained. Solar dryers thrive in conditions of high outdoor temperature, low humidity, and clear skies. The inside air temperature of the polyhouse is approximately 20–30 °C warmer than the outside air temperature, which accelerates drying in comparison to conventional drying, thereby reducing drying time.
THE BENEFITS OF SOLAR DRYERS
Several advantages of solar dryers include the following:
- Solar dryers can help you save money on fuel and electricity, and the drying time is significantly shorter than with open drying.
- Solar-dried fruits and vegetables are higher in quality and more hygienic than those dried in the open.
- Products are protected from flies, rain, and dust; products can be left in the dryer overnight during inclement weather due to the waterproof nature of the dryer.
- It minimizes losses and provides a more competitive market price for the products.
- Materials required to construct a solar dryer are readily available locally.
- Solar dryers pose no risk of fire.
- The dryers can be connected in series to increase capacity as needed, and they can be easily dismantled for easy transportation from one location to another.
- Achieved Product Quality
CONCLUSION: Solar drying systems, particularly for agricultural and marine products, are particularly viable in developing countries where labor costs are low but fossil fuel energy costs are extremely high.
Payment Options:Others: TT
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| ||REQUEST TO REMOVEWhat is Vinyasa? - Definition from Yogapedia|
May 02, 2018 · Vinyasa is a type of yoga that links movement and breath to attain balance in the mind and body. From the Sanskrit “to place in a special way,” vinyasa aligns a deliberate sequence of poses with the breath to achieve a continuous flow. Inhalation is usually connected to upward, open movements, while exhalation is often tied to downward ...
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Mar 21, 2017 · This cyclical sequence of downward-facing dog, plank pose, lowering down, cobra pose and downward-facing dog again is your basic vinyasa flow. It forms the foundation for many other flow sequences in Vinyasa yoga, and is the perfect starting point for exploring Vinyasa yoga. Flow through this sequence a couple more times to build familiarity ...
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May 01, 2020 · The word “Vinyasa”. While some people believe vinyasa means “movement with breath”, vinyasa actually is sanskrit for “to place in a special way”. The word predates yoga as a physical practice. You could “vinyasa” anything, from how you completed a project to how you hiked a certain path. Vinyasa was about mindfulness in the ...
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Sep 14, 2020 · Vinyasa can refer to a small subset of postures, like a mini sequence, or it can describe a whole class. For example, among the various vinyasa yoga poses is the sun salutation, or surya namaskara sequence. Surya namaskara A and surya namaskara B are two hallmark vinyasa sequence subsets found in almost all vinyasa classes.
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Vinyasa yoga is all about movement and the flow of energy as you sync the body and the mind together through motion and breath. This form of yoga embodies a yogic philosophy that in order to achieve true balance we must accept the change that happens around us and embrace it. We move through our poses as a way to accept the fluctuation of the world and join the body, the mind, and spirit into ...
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Feb 19, 2019 · Vinyasa is a style of yoga characterized by stringing postures together so that you move from one to another, seamlessly, using breath. Commonly referred to as “flow” yoga, it is sometimes confused with “ power yoga “. Vinyasa classes offer a variety of postures and no two classes are ever alike. The opposite would be “fixed forms ...
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A vinyasa ( Sanskrit: विन्यास, IAST: vinyāsa) is a smooth transition between asanas in styles of modern yoga as exercise such as Vinyasa Krama Yoga, Ashtanga Vinyasa Yoga and Bikram Yoga, especially when movement is paired with the breath. This article contains Indic text. Without proper rendering support, you may see question ...
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Jun 28, 2016 · Vinyasa Krama is a method of yoga practice that builds every posture from the simplest form to most complex using the appropriate kramas or stages, prioritizing the primary benefits and key actions of each. As a sequence progresses, any hindrance to breath or alignment indicates key actions from the previous krama have not been integrated and ...