ECONOMIZERS IN CHILLER SYSTEMS
Vinogradova, Ekaterina (2012)
Vinogradova, Ekaterina
Mikkelin ammattikorkeakoulu
2012
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201301311926
https://urn.fi/URN:NBN:fi:amk-201301311926
Tiivistelmä
There are many buildings that have cooling demands for different purposes. They can be hospitals, administrative and office buildings, shopping centers, data centers and also industrial buildings. Cooling of processes and products, cool rooms, ice halls, and air-conditioning systems require chiller system application. Chiller system is usually the substantial part of energy consumption of the build-ing. That’s why different ways of increasing of the chiller systems efficiency began to be used more often. Due to the widespread use a lot of schemes to optimize and improve the effectiveness of chiller sys-tems have been developed. One possibility is the installation of an additional low-cost equipment like the economizer systems. They may be applied in the refrigeration cycle of the chiller or in the rest chiller system. In the theoretical part of the thesis measures and methods of the chiller systems efficiency increasing and different types of economizers were described. Influencing on the economizers efficiency factors were noted. Study case contains the simulation of the office building in different modes with IDA Indoor Climate and Energy software. Some results of the simulations are presented in the tables. The benefit from the economizer operation is calculated as compared with traditional chiller system. Also influence of the economizer set-point temperature on its benefits was evaluated. The relationship between equipment cost and benefits from the system operation must be precisely evaluated in every individual case.