Showing posts with label ventilation system. Show all posts
Showing posts with label ventilation system. Show all posts

Saturday, February 4, 2017

Techshore Inspection Services : KITCHEN HOOD VENTILATION SYSTEM

KITCHEN HOOD VENTILATION SYSTEM
  • A Kitchen hood is a device containing a mechanical fan that hangs above the stove or cook top in the kitchen to provide proper ventilation inside a kitchen.
  • It removes airborne grease, combustion products, fumes, smoke, odours, heat, and steam as a result of cooking from the air by evacuation of the air and filtration. Also it provides the provision for the fresh air to enter.
Drawing1-Model.jpg
        The main component of a kitchen hood ventilation system is the hood which contains a fan or a blower which is driven by electricity. The blower can be placed either inside the hood or outside the kitchen according to the size of the hood.

CLASSIFICATION BASED ON INLET & EXHAUST

1. Single skinned
2. Double skinned
OBJECTIVE OF A KITCHEN HOOD VENTILATION SYSTEM
  • Remove fumes as a result of cooking at the source, i.e. as close as to the cooking equipment as possible, the ideal distance between hob and a hood is 0.6 to 0.9 meters.
  • Remove excess hot air and introduce fresh clean air so that a comfortable environment can be achieved. Inadequate ventilation can cause stress and suffocation for occupants, contributing to unsafe systems of work and high staff turnover.
  • Provide sufficient oxygen for complete combustion and prevent the risk ofaccumulating inside the room.
  • Should be easy to clean, fat residues and blocked air inlets should be avoided which lead to loss of efficiency and increase risk of fire.
  • Should be vibration free and noise free operation.
Electrostatic-Kitchen-Exhaust-Air-Filter-Oil-Grease-Precipitator.jpg



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Location: 36/977A Kattunilath, Lissie Hospital Road, Kochi, Kerala 682018, India

Tuesday, January 31, 2017

Techshore Inspection Services : District cooling system

District cooling system

District cooling systems (DCS) is a system which distributes chilled water or other media, usually provided from a dedicated cooling plant, to multiple buildings for air conditioning or other uses.
District cooling means the centralized production and distribution of cooling energy. Chilled water which is delivered through an underground insulated pipe line to office, residential and industrial buildings to cool the indoor air of the buildings within a district. The particularly designed units in each of the building then use this water to reduce the temperature of air which passing through the buildings ACS.
The output of one cooling plant is enough to achieve the cooling-energy demand of dozen of buildings. DC can be run on either electricity or natural gas, and can use as regular water or sea water. Along with water and electricity, DC constitutes a new form of energy service.
District cooling helps the environment by increasing energy efficiency and reducing environmental emissions including the greenhouse gas (GHG), air pollution, carbon di oxide (CO2) and ozone –destroying refrigerants. District cooling can minimize annual CO2 emissions by about 1 Ton for every Ton of district cooling refrigeration demand functioned.  
DCS –Components
  • Central Chiller Plant – Generate chilled water for cooling purpose.
  • Distribution Network – Distribute the chilled water to building.
  • User Station – Interface or crossing point own building air conditioning circuit.
The following figures illustrate the DCS system in a zone.



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Location: 36/977A Kattunilath, Lissie Hospital Road, Kochi, Kerala 682018, India

Thursday, September 1, 2016

HVAC (Heating Ventilation and Air Conditioning)

HVAC (Heating Ventilation and Air Conditioning)

Air conditioning, or HVAC&R, is an active, rapidly developing technology. It is closely related to the living standard of the people and to the outdoor environment, such as through ozone depletion and global warming. The term HVAC&R is an abbreviation of heating, ventilating, air conditioning, and refrigerating. The combination of processes in this commonly adopted term is equivalent to the current definition of air conditioning. Because all these individual component processes were developed prior to the more complete concept of air conditioning, the term HVAC&R is often used by the industry.
HVAC&R, system is composed of components and equipment arranged in sequence to condition the air, to transport it to the conditioned space, and to control the indoor environmental parameters of a specific space within required limits. Most air conditioning systems perform the following functions:
l  Provide the cooling and heating energy required
l  Condition the supply air, that is, heat or cool, humidify or dehumidify, clean and purify, and attenuate any objectionable noise produced by the HVAC&R equipment
l  Distribute the conditioned air, containing sufficient outdoor air, to the conditioned space
l  Control and maintain the indoor environmental parameters–such as temperature, humidity, cleanliness, air movement, sound level, and pressure differential between the conditioned space and surroundings—within predetermined limits.
Parameters such as the size and the occupancy of the conditioned space, the indoor environmental parameters to be controlled, the quality and the effectiveness of control, and the cost involved determine the various types and arrangements of components used to provide appropriate characteristics. Air conditioning systems can be classified according to their applications as (1) comfort air conditioning systems and (2) process air conditioning systems.
Comfort air conditioning systems provide occupants with a comfortable and healthy indoor environment in which to carry out their activities. The various sectors of the economy using comfort air conditioning systems includes the commercial sectors (office buildings, supermarkets, shopping centers etc.), institutional sectors (colleges, concert halls, theaters etc.), residential sectors ( hotels, motels, apartment houses etc.), health care sectors ( hospitals, nursing homes, and convalescent care facilities), and transportation sectors ( aircraft, automobiles, cruising ships etc.)
Process air conditioning systems provide needed indoor environmental control for manufacturing, product storage, or other research and development processes. Some example of areas that require process air conditioning systems are, humidity control in textile mills, clean room for electronic product manufacturing, precise temperature control during the production of precision instruments, and temperature, humidity and air cleanliness control for pharmaceutical products.

Reference:

Shan K Wang, Handbook of Air Conditioning and Refrigeration, McGraw-Hill, 2001.        
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Location: 36/977A Kattunilath, Lissie Hospital Road, Kochi, Kerala 682018, India
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