HVAC TECH

Performance Of Cooling Tower  Cooling tower performance The vital Parameters, from the purpose of determinant the performance of cooling towers, are: "Range" is that the difference between the cooling tower water Inlet and outlet temperature.  " Approach " is that the difference between the cooling system outlet cold water temperature and close wet bulb temperature. Although, each vary and approach ought to be monitored , the 'Approach' may be a higher indicator of cooling system Performance. cooling system effectiveness (in percentage) is that the ratio of range, to the perfect range, i.e.,difference between cooling water water temperature and close wet bulb temperature,  or in alternative words it's = range / (range +Approach).                                                                      ...

  HEAT EXCHANGERS  What is heat Transfer:- Heat Transfer  is the transition of thermal energy from a hotter object to a cooler  object. Heat Transfer done from a hot or warm area to a cold medium in 3 ways: By radiation from a warm surface to a cooler surface through air space  By conduction through solisolid or fluid materials  By convection which involves the physical  movement of air  Basics for heat Transfer are:- Difference in temperature between the hot and cold  fluids, greater the difference-higher the rate at which the heat will flow between them. area of the conductive barrier provided for heat flow. The greater the area, the larger the amount of  heat that will flow in a given time with a given temperature difference. rate of heat flow into,or,out, from each of the fluids. High high resistance to heat flow in either fluid will produce a slow overall rate of Transfer. flow of heat through the conductive barrier between fluids. ...

DESIGN Of HVAC SYSTEMS AND elements HVAC systems ought to be suitably designed and managed throughout their life cycle.  Documentation like schematic drawings ought to be maintained to replicate this state of affairs, together with however not restricted to, air offer and extraction,air Handling units,room pressure cascades,air flow direction, personnel and material movement,and waste removal. Risk management principles ought to be applied throughout the planning of AN HVAC system.  This includes,but isn't restricted to, acceptable controls of the climate and also the presentation of contamination and cross-contamination. The HVAC system capability ought to be enough to confirm that the desired Performance is maintained throughout traditional use.  Materials of construction for elements of AN HVAC system shouldn't become a supply of contamination.  Where potential, Ducting, piping, fittings sensors and different elements ought to be clearly marked or tagged for ea...

  CFM of Air Compressor  CFM stands for isometric feet per minute. it's the measuring of air volume discharged by the mechanical device in an exceedingly minute. The effectiveness of the mechanical device is often determined by the live of CFM and therefore the corresponding PSI. it's maybe the foremost important range that issues the compressor. It additionally determines the suitableness of the mechanical device for a selected work. the speed of air delivered typically depends on the pressure valves of the machine. Air Compressor CFM:- Air compressor CFM tends to vary reckoning on environmental variables like air pressure, humidity, and temperature. it's additionally Associate in Nursing uncertified definition and is thus used interchangeably with SCFM or normal isometric feet per minute. How to calculate CFM of Air Compressor:- Step 1:- To calculate air compressor CFM you have to first calculate the volume of the compressed air receiver tank. Which is mentioned on the ma...

Performance Of Refrigeration System  The intention of Performance checking is to  corroborate the performance of Refrigeration system by using  factual Performance  measures. The test will measure net cooling capacity( tons of Refrigeration) and the energy conditions all on the  factual  handling condition.    Definations-  1) Tons of Refrigeration( TR)- One tons of Refrigeration is the  quantum of cooling  goods produced in one ton of ice melting in a day.    1TR =  3024 kcal/ h, or 12000 btu/ h or 3.516 thermal kw    2) Energy effectiveness rate- EER is calculated by dividing the  quantum of Refrigeration  goods produced in watts to the  quantum energy input consumed to produce that effect in watts at full  cargo condition.    3) Kw/ ton conditions Generally known as a  effectiveness, but actually power input to compressor motor is divided by the refrigeration  good...

  Boiler Efficiency  Performance Evaluation of Boiler :- The performance parameter of boiler like evaporation ratio and the efficiency deteriorates with time due poor combustion, heat transfer surface fouling and poor maintenance and operation. Even for a new boiler, reasons such as a deteriorating fuel quality, water quality etc. can result in a poor boiler Performance. Evaporation ratio and boiler efficiency helps to find out the deviation of boiler efficiency. Boiler Evaporation ratio:- Boiler Evaporation ratio, is also known as a steam to fuel ratio is a common and simple indicator for boiler Performance trending. The typical valve of evaporation ratio on a different types of fuel used are as follows:- Biomass fired boiler    :   2.0 to 3.0 Oil fired boiler              :   13.5 to 14.5 Coal fired boiler           :    4.0 to 5.5 Gas fired boiler      ...