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Main / What is a zero energy cold chamber?

Fresh fruit and vegetable spoilage is a serious problem in tropical countries. Cool storage can extend the life of fresh products, but refrigerators are expensive to purchase, expensive to run, and expensive to maintain. However, there is a practical, inexpensive alternative to farm fruit and vegetable storage that uses the cooling power of evaporation. And they are easily made from locally available materials like brick, sand, bamboo, straw, and burlap.

Fresh fruits and vegetables are alive. They breathe and ripen even after the harvest. Cool temperatures stew this process so you can keep your fresh produce longer and avoid spoilage. Make a floor with bricks. Set up a 70 cm high double wall and leave a cavity 7 free.

Soak the chamber with water. Fill the cavity between the double wall with this damp sand. Make a cover frame out of bamboo. Build a thatched roof shed over the chamber to protect the chamber from direct sun and rain. A drip system can be built from plastic pipes and microtubes connected to an overhead source of water.

Do not use bamboo, wood or fiberboard boxes as these will be damaged by moisture. Water twice a day. Irrigation with a drip system. Cover these boxes with a thin polyethylene film.

Rebuild the chamber with new bricks after 3 years. The pores of the bricks become clogged over time and this reduces the effectiveness of the chamber.

Build your chamber in a place where there will be a breeze. Build on a raised construction site to avoid waterlogging. Use clean, unbroken stones with good porosity. Sand should be clean and free of organic matter, clay, etc. Keep the bricks and sand saturated with water. Prevent water droplets from coming into contact with stored products.

Keep the chamber clean. The empty chamber should be treated with an approved fungicide and insecticide. Zero Energy Cooling Chamber The spoilage of fresh fruit and vegetables is a serious problem in tropical countries. Living and breathing Fresh fruit and vegetables are alive. Construction 1 Choose an elevated location near a water source. Make a cover frame out of bamboo. 8 Build a thatched roof shed over the chamber to protect the chamber from direct sun and rain.

Operation - Keep the sand, bricks and top cover of the chamber moist. Irrigation with a drip system Cover these boxes with a thin polyethylene film. Pros - Can be built by an unskilled person. No mechanical or electrical energy is required. Disadvantages - Requires a significant capital investment - Operation relies on a reliable source of water year round. Animal husbandry and dairy.

Selection and breeding of cattle buffalo. Selection and breeding of goats and sheep. Selection and breeding of pigs. Community pasture management. Cattle feeding. Make hay to preserve the fodder. Make silage to get green fodder. Improve the dry food by adding urea. Liquid urea molasses mixture. Lick urea molasses mineral. Clean milk production. Animal diseases. Common diseases in cattle. Protect your cattle from poisoning.

Adjustment of the livestock. Vegetables and post-harvest technologies. Nutritional garden. Get nutrients.

Preservation through fermentation. Zero energy cooling chamber. Ice-free bamboo refrigerator. Organic farming. Compost production. Multipurpose trees and shrubs. Seed production and storage. Produce your own wheat, rice and legume seeds. Storage of grain and seeds. Safe grain storage structures. Improved rodent-free grain storage. Pests and pesticides. Integrated pest control. Neem for crop protection. Neem oil as a mosquito repellent.

Biological control of malaria. Non-chemical weed control methods. Safe use of pesticides. Pesticide hazard. Pesticide facts and fictions. First aid measures against pesticide poisoning. Protect your crops from bird damage.

Reduce the drudgery. Drudgery-reducing devices for women farmers. Fuel efficient chulhas. Solar cooker. Biogas as a rural energy source. Efficient use of fuel energy. Water management for farm and home. Drinking water.

Maintenance of municipal water sources. Drinking water management for the household. Some Simple Ways To Purify Drinking Water. Using native plants to purify water. Soaking pit for proper sewage disposal.

Efficient use of irrigation water. Fish production. Integrated fish farming. Compound fish culture. Paddy - fish culture. Cattle culture. Duck - fish culture. Pig fish culture. Horticulture on dikes.