What is the Appropriate Chiller System Layout?

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Jejo Active Contributor Join Date: May 2011 Posts: 11	What is the Appropriate Chiller System Layout? 06/07/2011 7:07 AM
	I have doubt in the cooling system layout implemented in our plant.Our plant has two air cooled(60Ton and 30ton) and a water cooled(15Ton) chiller.The inlet to both air cooled chiller is taken from tank 2.The outlet from the chiller also goes to the same tank 2.Then it is pumped to the load1.The return from the load is fed to another tank(tank 1).It is allowed to rest for some time(Maintenance head of our company says it is for sedimentation).Then it is pumped to the tank 2 and circuit completes.Meanwhile the water cooled chiller takes it inlet from tank 3 and outlet back to the same tank.Then it is pumped to the load 2 and back to the same tank.The cooling tower for the water cooled chiller takes water from the tank 1 and return the water back to it. Please find the drawing. I am new to this company and very much confused about this layout.There is no splits in the tank.All our pumps are constant flow type. Is this the appropriate layout? Is the inlet and outlet of the chiller given to same tank normally?
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chrisg288 Guru Join Date: Sep 2006 Location: Clive, Alberta, Canada Posts: 5916 Good Answers: 204	#1 Re: What is the Appropriate Chiller System Layout? 06/07/2011 11:43 PM
	I tend to agree.. but I'm not an HVAC engineer. I did work with the hvac graphics for 10 years, and attend a 2 week course. what I'm used to seeing is chilled water separated from condenser water. the tank 1 seems to be mixing condenser water from the cooling tower with the chwr from the load 1. that is confusing to me too. are you sure there isn't a heat exchanger inside tank 1? chris
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#2 Re: What is the Appropriate Chiller System Layout? 06/08/2011 12:07 AM
	It might be amusing to have whoever built this actually explain it, especially if there are no baffles (splits) in the various tanks. In the drawing, it would be nice to show the pump locations and flows, and also the water temperatures at all the various piping points. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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mrswamy Guru Join Date: Jun 2008 Location: Oman Posts: 612 Good Answers: 14	#3 Re: What is the Appropriate Chiller System Layout? 06/08/2011 12:30 AM
	Is the chilled water is used for A.c purpose or for process applications? What are the inlet and out temperatures? I must have been designed by HVAC consultant? If you refer the O & M manual system must have described with proper justification. With your observation if you professionally feel the lay out can be modified to save energy or any other parameters you can discuss with your higher officials and execute your innovative ideas.
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dj95401 Guru Join Date: May 2009 Location: Saint Helens, Oregon Posts: 2216 Good Answers: 70	#4 Re: What is the Appropriate Chiller System Layout? 06/08/2011 2:38 AM
	Is this some kind of cool sewer system? It's a cool block diagram, but that's all it looks like to me. Seems like your missing some critical pages mainly the spec's __________________ Confucius once said, “ Ability will never catch up with the demand for it".
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Geon Melek Zahir Ahsan Associate Join Date: Mar 2011 Posts: 29 Good Answers: 1	#5 Re: What is the Appropriate Chiller System Layout? 06/08/2011 7:55 AM
	Flow diagram shows work of a plumbing man, not HVAC agency. All tanks should be removed & chilled water pipe headers connected directly to loads in factory thru variable secondary chilled water pumps+2way valves or constant speed pumps+3way valves. You have not mentioned the country of installation, however any good agency will be able to rectify within a short time. A common CHW header with a set of pumps will suffice if water temperature is uniform, alternately use seperate headers & pumps
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Fredski Guru Join Date: Feb 2011 Posts: 7025 Good Answers: 207	#6 Re: What is the Appropriate Chiller System Layout? 06/08/2011 8:19 AM
	This is a joke, right?
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pritam Guru Join Date: Aug 2008 Location: City of destiny, INDIA Posts: 775 Good Answers: 67	#7 Re: What is the Appropriate Chiller System Layout? 06/19/2011 9:34 AM
	Is this the appropriate layout? Is the chiller inlet & outlet of the chiller are given to the same tank normally? This is not an appropriate layout. The chiller inlet & outlet are not given to the same tank normally. There must be a big flaw in your layout. Bigger air cooled chiller and smaller water cooled chiller is also not digestible. Normally water cooled chillers are bigger in capacity. Provision of cooling tower with pump and piping for tiny 15 ton chiller looks amazing.
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