Chilled Water Cooling Coil Selection

Understand the balance of coil face area airside pressure drop and waterside pressure drop when selecting a coil 5.

Chilled water cooling coil selection.

Whether it s a basic duct booster coil or a custom coil we can meet all of your specifications with accuracy ease and at a competitive price. Coil performance can even influence the efficiency of the chiller. In many cases higher delta t results in a higher average temperature of the chilled water as it goes through the cooling coil at your load. We design to avoid this.

Standard and custom designs are available for new and retrofit installations. The delta t was 10 degrees 54. On a cooling coil air velocities above 500 fpm is the point where water droplets can leave the outer edge of the fin. Water coils need to be piped for counter flow with the return being on the entering air side of the coil and the supply being on the leaving air side of the coil.

Most chilled water coils have air entering the system at a temperature ranging from 75 f to 95 f return or outside air while chilled water enters the coil at a temperature around 42 45 f. Chilled water coils typically consist of between 3 12 rows of tubes. Key decisions for coil selection dynamics of heat. Properly protect water coils from freezing when necessary agenda water and air velocity ranges coil selection examples chilled.

Evaluate water coil selection choices at various water temperatures and flow rates 4. Chilled water cooling coil selection example 4 chilled water coil worksheet example 5 chilled water coil worksheet 6 enthalpy of air table 1 7 air density correction at altitude table 2 7 air density correction at temperature table 3 7 log mean temperature difference table 4 8 basic capacity figure 1 8fpi 9 basic capacity figure 2 1ofpi 10. The extent to which coils raise the chilled water temperature dramatically affects both capital investment in chilled water piping and pumping power. Chilled and hot water coils chilled and hot water coils are available in 1 5 8 1 2 and 3 8 inch od copper tubes with aluminum or copper fins.

With options that include copper fins and stainless steel casings our coil units help to power the broadest line of air handling systems in the industry. In these cases the cooling coil cannot perform as much cooling. We offer a complete line of hvac heating and cooling coils for all your replacement and new construction needs. For example it was once common for chilled water to be 44 f supply temperature and 54 f return temperature.

This is called moisture carry over. This allows the return water to temper the warmest entering air getting it closer to its set point prior to leaving the last row where it will see the coldest supply water temperature. Cooling coils are an integral part of the chilled water system too. York offers a broad selection of high efficiency commercial hvac coils for hot water or steam heating and chilled water or direct expansion air conditioning.

Typical chilled water coil 500 fpm.