COMPUTER SIMULATION OF WASTE HEAT RECOVERY GAS TURBINE UNIT INTAKE AIR COOLING SYSTEM WITH PRODUCING OF CONDENSATE

Андрей Николаевич Радченко, Богдан Сергеевич Портной, Александр Игоревич Прядко, Сергей Анатольевич Кантор, Александр Игоревич Прядко, Сергей Анатольевич Кантор

Abstract


The heat-humidity processes in the two-stage air cooler of combined type with water stage of precooling air to the temperature above 15 °C and refrigerant stage of further deep cooling air to the temperature about 10 °C by utilizing the exhaust gas waste heat in the absorption lithium-bromide chiller as the high temperature cooling stage and refrigerant ejector chiller as the low temperature cooling stage of the combined thermotransformer for gas turbine intake air cooling has been analyzed for daily changing ambient air temperatures and corresponding heat loads on the stages as consequence. The processes of producing the condensate as a subproduct of gas turbine unit intake air two-stage cooling were simulated for two variants of design heat loads upon air cooler stages: for approximately equal heat loads upon the air cooler stages and for more than twice decreased heat load upon the high temperature cooling stage as compared with a heat load upon the low temperature cooling stage. The data about hourly amount of condensate extracted in each air cooler stage summed up over days and month and its temperature were calculated. The results of calculation have shown that the temperature of condensate received in the refrigerant low temperature cooling stage is about 11 °C and the temperatures of condensate received in the high temperature cooling stage with a chilled water temperature of 7 °C from absorption lithium-bromide chiller is about 15 °C that is the first one is lower by about 4 °C. It was also shown that the temperature of condensate from both stages of a combined twostage air cooler remained nearly unchangeable during July. A conclusion about separate rejecting condensate from high and low temperature cooling stages of air cooler was made. The reserves of refrigeration capacity of absorption lithium-bromide chiller and refrigerant ejector chiller due to daily changeable heat loads were analyzed from the point of their use for cooling of condensate to the temperature of about 7 °C and its application as a coolant for high temperature cooling stage of gas turbine intake air cooler.

Keywords


combined cooling, air, absorption-ejector heat transformation, condensate, accumulatio

References


Popli, Sahil., Rodgers, Peter., Eveloy, Valerie. Trigeneration scheme for energy efficiency enhancement in a natural gas processing plant through turbine exhaust gas waste heat utilization. Applied Energy, 2012, no. 93, pp. 623–636.

Popli, Sahil., Rodgers, Peter., Eveloy, Valerie. Gas turbine efficiency enhancement using waste heat powered absorption chillers in the oil and gas industry. Applied Thermal Engineering, 2013, no. 50, pp. 918– 931.

Radchenko, A. N., Kantor, S. А. Metodologicheskiy podhod k racionalnomu proektirovaniju kombinirovannoi teploispolzuyushchey sistemy okhlazhdeniya vozdukha na vhode gazoturbinnoy ustanovky [Metodological aproaches of rational designing of combined waste heat recovery system for gas turbine unit intake air cooling]. Аviatsionnokosmicheskaya tehnika i tehnologiya – Aerospace technics and technology, 2015, no. 4 (121), pp. 76–79.

Radchenko, A. N., Kantor, S. А. Metod vybora racionalnoy teplovoy nagruzky absorbcionnoezhektornogo termotransformatora okhlazhdeniya vozdukha na vhode regenerativnyh GTU kompressornyh stanciy [The method of evaluation of rational heat load on absorption-ejector thermotransformer for cooling regenerative GTU intake air of compressor stations]. Аvitsionno-kosmicheskaya tehnika i tehnologiya – Aerospace technics and technology, 2015, no. 5 (122), pp. 61–64.

Hans Güntner GmbH. Available at: http://www.guntner.su/; Güntner Product Calculator Available at: http://www.guentner.de (аccessed 15.09.2017).




DOI: https://doi.org/10.32620/aktt.2017.6.07