Authors

Improvement of the ABRC-based cooling system to increase the efficiency of the trigeneration complex

DOI: 10.17586/1606-4313-2025-24-3-3-10
UDC 621.574.013-932.2

Improvement of the ABRC-based cooling system to increase the efficiency of the trigeneration complex

Kornilev A.N., Olga S. Malinina, Baranenko A.V.

For citation: Kornilyev A.N., Malinina O.S., Baranenko A.V. Improvement of the ABRC-based cooling system to increase the efficiency of the trigeneration complex. Journal of International Academy of Refrigeration. 2025. No 3. p. 3-10. DOI: 10.17586/1606-4313-2025-24-3-3-10

Abstract
The use of trigeneration systems ensures energy resources saving and improvement of energy efficiency of technologies. Currently, serial absorption litium bromide refrigerating chillers (ABRC) are generally used. The authors have analyzed the energy balance of a trigeneration complex with a single-stage two-section ABRC. The effect of using hot water from the heat utilization system accumulating the heat of waste gases from gas piston units (GPU) as a heat source for the ABRC drive is estimated. The temperature of the generator heating water is in the range of th = (110...75)℃. To possibly increase the cooling capacity for the cooling system of the complex, the selection and calculation of the combined cycle of ABRC with two-stage generation (type 4), which allows simultaneous utilization of waste heat of different potential, is carried out. For this thermodynamic cycle of ABRC, the calculated dependences of values for the thermal coefficient from the degassing zone at different temperatures of cooling water (the thermal coefficient is equal to 0.93 at tw1 = 30 °С, Δξ= 4%), as well as temperature graphs of hot water have been obtained. It is shown that the application of ABRC with two-stage generation (type 4) allows to increase the running capacity of the cooling system by 10.6 %. It also allows to reduce the load on the steam compressor refrigeration machine (PCRM) by more than half, thereby reducing the cost of electrical energy and reducing the number of starts and stops of the screw compressor. The results of the research can be used for modernization of cooling systems in operating trigeneration complexes.

Keywords: trigeneration, absorption lithium bromide refrigerating chiller, solution heat exchanger, gas piston plant, heat utilization system, combined thermodynamic cycle.

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