Chiller Vs Boiler

[irfansiddiqui]

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 ?

 

[MintJulep]

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?

 

[willard3]

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.>>>>>>>>>>>

 

[ProcessHVAC]

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.

 

[jkauwale]

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

 

[Noway2]

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.