{ "item_title" : "Electrical Engineering Basics for HVAC System", "item_author" : [" Prasun Barua "], "item_description" : "Welcome to Electrical Engineering Basics for HVAC SystemThis is a nonfiction science book which covers fundamentals of electrical engineering that HVAC engineers and other mechanical engineers would find beneficial in their daily work. A heating, ventilation, and air-conditioning (HVAC) system is a simple system of heating and cooling exchangers that use water or refrigerant as the medium (direct expansion system). Pumps transport warm or cooled water to exchangers. The warmed or cooled air produced by the exchangers is subsequently moved to the occupied building interiors via fans. As a result, heating and cooling occur in two stages. They are as follows: water stage and air stage. Water is the most efficient and cost-effective medium for cooling (through a chiller) or heating (via a boiler). Because it may be cooled or heated through coils, air is the medium for heat exchange in the building. Fans are utilized in HVAC systems for air circulation and ventilation. Cooling is performed through the use of chillers to provide chilled water for large buildings or direct expansion cooling devices such as packaged air conditioners for small structures. In the heating system, boilers are most commonly used to provide hot water for heating, but electric heaters are also widely utilized for zonal reheat. Pumps are used to circulate hot water, chilled water, and condenser water. Heat rejection is accomplished by the use of cooling towers. The cooling tower fan and pumps consume the most energy. Non-electrical engineers may find power distribution systems and equipment needed to power HVAC machines, motors, and other auxiliaries to be difficult. This is the first edition of the book. Thanks for reading the book.", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/9/79/839/555/9798395555649_b.jpg", "price_data" : { "retail_price" : "29.99", "online_price" : "29.99", "our_price" : "29.99", "club_price" : "29.99", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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