Archive for May, 2014

Insect Growth Chamber- Behavioral study of insects

May 16th, 2014

Insects are the largest group of Arthropods. There are over 800,000 different types of insects. Insects are very adaptable, living almost everywhere in the world. Common insects include the fly, beetle, butterfly, moth, dragonfly, bee, wasp and praying mantis. Insects have an exoskeleton that covers their entire body. An insect’s body consists of 3 parts: the head, thorax and abdomen.

Insects are beneficial as they pollinate crops, act as natural enemies of damaging pests, and produce useful products for humans. Also, they are harmful as major pets of food crops, vectors for transmitting deadly diseases, and cause damage to our urban infrastructure, environment, forest and natural resources. The study of insect ecology is important to understand their evolution and diversification and their influence on the functional and trophic links between different components of associated habitats.

The Insect Growth Chamber an example of environmental chamber provides a unique high volume solution for a wide variety of entomological studies and offers reliable results for insect rearing experts. Insect growth chamber helps in the behavioral study of insects under environmental conditions such as humidity, temperature and light. Phenol coated refrigeration coils of the insect growth chamber resist the corrosive effects of acids inherent in the rearing of insects.

Entomological studies may help in the prevention of insect borne diseases like malaria and dengue (e.g risk prediction of dengue vector which can be useful for developing dengue vector).

Many insects rely on energy reserves stored in the fall to fuel their breeding biology in the spring. As winter conditions change with climate change, these altered temperatures will affect the energetic of overwintering in many insects. Investigating these effects, using the climate control available in the insect growth chamber one can get the useful data/information that will be valuable for both conservation of biodiversity and the prediction and management of some pest insects.

Many insects migrate in response to both predictable and unpredictable habitat deterioration, using environmental cues to evaluate habitat quality. By examining the ecology and physiology of insect migration under controlled environmental condition, one can generate the data that will not only broaden the basic understanding of the process involved in migration but also allow examining possible consequences of climate change for migratory species.

Some Application areas where Insect growth chamber is useful;

  • Entomological studies
  • Developmental biology
  • Conservation of biodiversity
  • Plant and insect interaction
  • Insect pathogen interaction
  • Insecticide research

Industrial Climate Control Air Curtain

May 14th, 2014

An Air Curtain is a continuous broad stream of air circulated across a doorway serving a conditioned space. Air curtains are normally mounted horizontally over the door. They can also be mounted vertically at the side of the door or under the floor directed upwards

Air curtains are the best device to control the indoor climate in all the places where the doors cannot always be closed. The main purpose of Air Curtain is to disallow the influx of outside air through opening. Opening where an Air Curtain would typically be used are exterior shipping and receiving doors to plants and warehouses and interior doors between plant areas of different temperatures. These are used not only to prevent cold air from pushing its way in, but also prevent warm air from going outside the door.

In order to control climate an Air Curtain emits an air stream with enough velocity at the nozzle and the width of the nozzle. For different door sizes and different wind conditions, different air velocities at the nozzle are required.

To prevent the entry of outside winds the discharge nozzle is angled outward so that the air leaving it meets the wind trying to enter. The wind meet/strike the Air curtain stream in the doorway. Working principle is shown in the figure below;

blog images

When the vector representing the air stream and the vector representing the wind equalize they form a resultant which should meet the floor in the door plane for maximum efficiency.

The doors on industrial buildings are often open for long periods of time and can be extremely wide, in the case of warehouse doors. With people and delivery vehicles needing access, closing these doors to maintain the internal atmosphere is impractical. An industrial Air Curtain mounted above or to the side of these entrances will create a more comfortable and safer working environment.

For areas that are temperature controlled, Air Curtains act as an invisible barrier sealing in the chilled or heated air, providing unhindered access for staff and removing the inconvenience of fast-acting shutter doors or plastic slats.

Ice Flakers Machine

May 13th, 2014

It is an ice making equipment which is used to produce flat and sub cooled ice flakes. In the Ice Flakers Machine water flows from storage container into ice maker cylinder. This cylinder is surrounded by an evaporating coil so that the water is frozen on the inside of the cylinder at low evaporation temperature.

The ice is then removed from cylinder wall in this layer by a work which revolves inside the cylinder and pushes the ice upward. Here it is pressed hard, frozen further & then broken off and ejected. The operations completely automatic and no operating personnel are required.

These ice flakes are widely used in supermarket refreshing, food processing, fishery, chemicals, medical nursery and mining etc as it has got property of outstanding refrigeration effect. In cooling flake ice is quickest than any other ice.

Advantage of Ice Flakers Machines

  • No operating personnel are required
  • Large contact area provided by Ice Flakes (large the contact area faster it cools other stuffs)
  • Long life Expectancy
  • Low production cost (power consumption/kg)
  • Hygienic ice (during production and up to the point of removal from the point of store it is untouched)
  • Quick cooling (because of large and crystalline surface)
  • No wastage of water (each liter produces one kg of ice)

Applications of Ice Flakers Machines

Ice flakers machines has a wide range of application some of it application areas are

  • Research Laboratory; in laboratories some reactions are required to carry out at low temperatures in vitro, then ice flakes due to their large contact area are very useful for these reactions.
  • Industrial Applications; these machines are very useful in many industries such as

a)      chemical industry (pigments, dyes, drugs and intermediates),

b)      construction (low temperature concrete mixing, aggregate/sand cooling),

c)       Meat and poultry (preservation, processing for value addition)

d)      Seafood (fishery, saqua culture, over sea/on land processing and preservation)

  • Food production processes; used in poultry, red meat and sausages plants to retard heat build-up, bacterial and salmonella growth as well as to prevent water weight loss during shipment. It can also be used for preserving fruits and vegetables.
  • Food industries like; Hotels, restaurants, bars, flights kitchens, catering and cold accumulation.
  • Medicines; in most cases of biosynthesis and chemosynthesis, flake ice is used to control the reaction rate and maintain the liveness. Flake ice is sanitary, clean with rapid temperature reduction effect. It is most ideal temperature reducing carrier.
  • Bakery; during the mixing of flour and milk, flake ice can prevent the flour from self-raising.