Operational optimisation of centrifugal compressors in multilevel refrigeration cycles

An Artificial Neural Network Model for Prediction of the Operational Parameters of Centrifugal Compressors: An Alternative Comparison Method for Regression

Nowadays, centrifugal compressors are commonly used in the oil and gas industry, particularly in the energy transmission facilities just like a gas pipeline stations. Therefore, these machines with different operational circumstances and thermodynamic characteristics are to be exploited according to the operational necessities. Generally, the most important operational parameters of a gas pipel...

Performance Evaluation of Small Centrifugal Compressors for Application in Air-Cycle Power and Refrigeration System

COPs OF R718 IN COMPARISION WITH OTHER MODERN REFRIGERANTS

Water as a refrigerant (R718) is compared with other modern refrigerants (R717, R290 R134a, R12, R22, and R152a) regarding refrigeration capacity and COP (coefficient of performance). A computer program simulating a theoretical vapor compression refrigeration cycle was developed to calculate COPs, compression ratios, and discharge temperatures of the refrigerants from the compressor. The effect...

Breakthrough of Large Positive Displacement Rotary Compressors in the Second Half of the 20th Century

Only two classes of compressors were offered at the end of the 1950s in the United States for large air conditioning and refrigeration applications: the positive displacement reciprocating and the dynamic centrifugal machines. Reviewing manufacturers’ catalogs of water chillers showed that the capacity range of the two classes overlapped. The authors of a 1961 paper came to the following conclu...

A Computer Programmed Design Optimisation and Analysis of Compressor Impeller

Centrifugal compressors are most widely used in large capacity refrigeration and air conditioning plants. Its other applications include in gas turbines for air craft applications, diesel engine turbochargers, chemical and process industries, factory workshop air supplies etc. In refrigeration field these are suitable for high specific volume refrigerants or low pressure stages. They have been ...