A technical and economic analysis of an innovative two. Different types of process chillers fall under two main categories. A chiller is a machine that removes heat from a liquid via a vaporcompression or absorption. Today we will study the difference between vapour compression and vapour absorption refrigeration system in detail. A comparative study of water as a refrigerant with some current refrigerants pdf. Ylcs watercooled or remote aircooled screw compressor chiller.
In this article well be covering the different types of chillers available, where they are used as well as the pros and cons of each chiller type along with some examples of where theyre used. Vapor compression chillers are the most common and include 1 air chillers and 2 waterfluid chillers. A dynamic centrifugal water chiller model is developed and validated using experimental data. A dynamic model of a vapor compression liquid chiller. This document is intended for use by ownerauthorized. Chillers are further categorized by the type of compressor technology used. Absorption chillers utilize water as the refrigerant and hence rely on the strong affinity between the water and a lithium bromide solution to achieve a refrigeration effect. Key parameters of a watercooled centrifugal vapor compression chiller for a. Before moving further on differences lets have an overview of both the vapour compression and vapour absorption refrigeration system. Chiller types and application guide the engineering mindset. For more details on the basic operation and components of a chilledwater system, consult another trane. At the bottom of the articles you can download pdf. Vapor compression refrigeration cycle, refrigerants. Compressor oil cooler screw or centrifugal compressors may require cooling to increase lifetime andor efficiency.
This manual discusses the chiller s evaporator and condenser and their relationship to the chilledwater system. Compression cycle ahri standard 550590 ip with errata. Using a phasechange refrigerant, the chillers compressor pumps heat. The current scope of the aircooled chiller accl and watercooled chiller wccl certification programs can be found on ahri website the scope of the certification programs should not be confused with the scope.
A new approach to steady state modelling of vapour compression liquid chillers is presented in this paper. Well be covering air cooled chillers, water cooled chillers, centrifugal compressor chillers, turbocor. The model uses a generalised radial basis function grbf neural network to predict. So, a chiller is a machine that removes heat from a liquid via a vapour compression or absorption refrigeration cycle. A centrifugal chiller utilizes the vapor compression cycle to chill water and reject this heat collected from the chilled water plus the heat from the compressor to a. Indirect thermal sources include hot water, steam, or combustion exhaust. Department of energy office of energy efficiency and renewable energy. The shellandtube heat exchangers are modeled using a finitevolume formulation.
168 1088 720 36 1213 790 1215 1406 763 756 671 389 126 379 1391 136 593 1504 360 829 192 448 807 729 1461 115 906 545 1126 636 349 285 1506 639 1570 1524 747 871 976 638 1401 1365 1423 665 863 1382 610 471 1040 152