×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Chiller Vs Boiler

Chiller Vs Boiler

Chiller Vs Boiler

(OP)
the heating capacity of the building which i m designing is 250 TR now i have to recommend either absorption chiller or Boiler both have almost same consumption rate, the installation of the chiller is about 1.35 times the installation of boiler. but if i install chiller i will get an advantage of cooling during summer season. now help me decide the option, which should be preferred? and also tell me if i am going right ?

RE: Chiller Vs Boiler

Seriously?

A decision like this requires significant life-cycle cost analysis.

Do you really expect that anyone could provide any useful advice at all from the zero information that you have provided?

RE: Chiller Vs Boiler

Hire an Engineer familiar with HVAC and read forum policies which begin as follows:

>>>>>>>>These fora should not be used to bypass your own in-depth research on the issues that affect you, nor is it intended to be a substitute for appropriate professional assistance within your field or geographical region.>>>>>>>>>>>

RE: Chiller Vs Boiler

Do a life-cycle analysis and evaluate between the two (or more) decisions, you might need detailed hourly loads to do this, peak heating/cooling loads by itself are meaningless if you are evaluating operating costs.

RE: Chiller Vs Boiler

Absorption chillers are typically more expensive and are only used when you have large amounts of waste heat available. But as everyone has said before...you should conduct a life cycle cost analysis.

Justin K, P.E.
http://www.engproguides.com

RE: Chiller Vs Boiler

First off, there may be a bit of confusion that needs to be cleared up. Are you looking to produce hot water or are you looking for a load to reject waste heat? An absorption chiller will use waste heat and provide a heating load and give you cold water. If you are looking to produce hot water, which is what it sounds like from your post as your alternative is a boiler, I don't think an absorption chiller is what your after.

In any case, I would seriously have second thoughts about an absorption chiller. They tend to be *VERY* maintenance sensitive and require a lot of care and feeding. If not handled properly, they also have short life spans. If you have a decent cooling load, most of the time, with a constant need for hot water, you may want to consider a heat recovery system using an electric chiller. A typical system will produce hot water at ~1.2KW/ton, which may be less than your boiler costs, with the benefit of getting cold water as a side effect. The overall efficiency and cost if you need both heating and cooling can result in a substantial savings. You can also gain better efficiency if you run the chiller at a lower condenser temperature and may be better off overall to use it as a preheat for a boiler system. The other thing to consider is that if you need a cooling load for your cold water in order to make hot water with a chiller.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources