Aerospace Technic and Technology

It is proposed the definition of the installed (rational) refrigeration capacity of a waste heat-recovery absorption-ejector chiller that utilizes the heat of the exhaust gases of a gas turbine unite to cool the air at the inlet. Since the effect of air cooling, in particular in the form of a reduction in the specific fuel consumption, depends on its depth (the magnitude of the decrease in air temperature) and duration, it is proposed to determine it by the annual fuel economy. As an example of air cooling at the inlet of a gas turbine unit, the value of reducing specific fuel consumption due to cooling the air at the inlet to the temperature of 15 °C by an absorption lithium-bromide chiller and two-stage air cooling: to a temperature of 15 °C in an absorption lithium-bromide chiller and down to 10 °C – in a refrigerant ejector chiller as the stages of a two-stage absorption-ejector chiller, depending on the installed (design) refrigeration capacity is analyzed.

It is shown that proceeding from the different rate of increment of the annual reduction in the specific fuel consumption due to the change in the thermal load in accordance with the current climatic conditions, it is necessary to choose such design heat load for the air cooling system (installed refrigeration capacity of the chillers), which ensures the achievement of the maximum or close to annual reduction in the specific fuel consumption at relatively high rates of its increment. In order to determine the installed refrigeration capacity, which ensures the maximum annual refrigeration capacity (annual production of cold), the dependence of the increment of annual fuel economy from the installed refrigeration capacity is analyzed. Based on the results of the investigation, it was proposed to determine the rational thermal load of the air cooling system (installed - the design refrigeration capacity of the chiller) in accordance with the changing climatic conditions of operation during the year, which provides a maximum annual reduction in the specific fuel consumption at relatively high rates of its increment

thermal load; chiller; two-stage air cooling; specific fuel consumption

Marques, R. P., Hacon, D., Tessarollo, A., Parise, J.A.R. Thermodynamic analysis of trigeneration systems taking into account refrigeration, heating and electricity load demands. Energy and Buildings, 2010, vol. 42, pp. 2323–2330.

Ortiga, Jordi., Bruno, Joan Carles., Coronas, Alberto. Operational optimisation of a complex trigeneration system connected to a district heating and cooling network. Applied Thermal Engineering, 2013, vol. 50, pp. 1536–1542.

Radchenko, A. N., Kantor, S. А. Metod vybora ratsional'noy teplovoy nagruzki absorbtsionno-ezhektornogo termotransformatora okhlazhdeniya vozdukha na vkhode regenerativnykh GTU kompressornykh stantsiy [The method of evaluation of rational heat load on absorption-ejector thermotransformer for cooling regenerative gtu intake air of compressor stations]. Aviacijno-kosmicna tehnika i tehnologia - Aerospace technic and technology, 2015, no. 5 (122), pp. 61–64.

Radchenko, A. N., Kantor, S. А. Metodologicheskiy podkhod k ratsional'nomu proyektirovaniyu kombinirovannoy teploispol'zuyushchey sistemy okhlazhdeniya vozdukha na vkhode gazoturbinnoy ustanovki [Metodological aproaches of ratinal designing of combined waste heat recovery system for gas turbine unit intake air cooling]. Aviacijno-kosmicna tehnika i tehnologia - Aerospace technic and technology, 2015, no. 4 (121), pp. 76–79.