Chilled water piping system design

Meet its needed evaporator flow requirements independent of other chiller operation. Primary flow must always be equal to or greater than secondary flow. The chilled water produced reduces the load on the central chillers. The maximum allowable elevation of chilled water piping in the building is 565 feet above sea level. Chilled water system in hindi chilled water pipe sizing. In this training video you are going to learn how to design a hvac chilled water piping using pipe sizing software and autocad as example. The building system includes all chilled water piping in the building. Chilled water plant design guide energydesignresources taylor. The main disadvantage of cpf designs is high pump energy con sumption. Designing chilled water systems specifying engineer. Chilledwater system design issues learning from past. Designing chilled water systems typically used for cooling and dehumidifying a buildings air, chilled water chw systems circulate it throughout a building or campus complex. Chilled water piping distribution systems ashrae 31214.

While designing a chilledwater system, a myriad of decisions must be made. Chilled water piping distribution systems ashrae 3. Chilled water design specifications facilities services. This 400ton system includes two watercooled chillers piped in parallel. Conversion of a parallelpiped system to series, and from conventional to increased. System flow below chiller min flow 250 gpm variable primary flow at 25% system load twoway valves control capacity by varying flow of water in coils per chiller system load 50 tons 176kw 50tons 176 kw primary bypass flow 250 gpm 95 ls 150 gpm 9. Chilled water system in hindi chilled water pipe sizing part 1. This video gives a brief overview of the basic function of a chilled water system and chilled water piping basics, and explain working of. Mechanical engineers who design chilled water plants are the target audience for the guide. Chilled water pipe designing design calculation pipe sizer.

Chilled water system basics hvac commercial cooling. Chilledwater system design decisions this engineers newsletter walks through a number of design decisions, with discussion and examples to explain how and why those decisions are made. The basics about chilled water piping, pipe sizing,pump selection. Experienced engineers often make these decisions automatically as they have in the. Control and operation of the system is relatively simple and easy to understand. The chilled water is generated and circulated in the primary side, the secondary loops will pull chilled water out of the header to cool the building and then dump the warm return back into the header. It may be beneficial to pipe the chillers in series if the system.

The range of allowable elevation of chilled water piping in the building is a maximum of 565 feet above sea level and a minimum of 350 feet above sea level. Chiller compressor may be centrifugal, scroll, screw or reciprocating 3. The chilled water circulates through a chilled water loop and through coils located in air handlers. Chw systems also may be used for removing process or other heating loads. If the system is above 150 psi static intermediate he or chw systems are. Designing chilled water systems consulting specifying engineer. Chilled water systems include other hvac equipment designed to exchange heat such as computer room air conditioners. Chilled water plant design guide december 2009 energydesignresources. Selecting chilled water distribution system flow arrangement. Table 68 pipe sizing chart from addendum af to ashrae standard 90. Chilled water design specifications unc facilities. The designer must consider the following when designing the building chilled water systems. Regardless of whether the design is for a new chilled water chw system.