Optimal thermal power of the absorption heat pump with steam heating, which is integrated into the steam turbine PT-60/70-130/13

Authors

Oleksandr L. Shubenko, Anatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine (2/10, Komunalnykiv str., Kharkiv, 61046, Ukraine), e-mail: shuben@ipmach.kharkov.ua, ORCID: 0000-0001-9014-1357

Viktoriia O. Tarasova, Anatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine (2/10, Komunalnykiv str., Kharkiv, 61046, Ukraine), e-mail: vat523710@gmail.com, ORCID: 0000-0003-3252-7619

Mykola Yu. Babak, Anatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine (2/10, Komunalnykiv str., Kharkiv, 61046, Ukraine), e-mail: Bab67Nik@gmail.com, ORCID: 0000-0002-4281-2790

Oleksii Yu. Boiarshynov, Anatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine (2/10, Komunalnykiv str., Kharkiv, 61046, Ukraine), e-mail: aleksey.boiarshynov@gmail.com, ORCID: 0000-0003-3412-3212

Abstract

The task of calculating the optimal thermal intensity of an absorption lithium bromide heat pump (ALBHP) with steam heating, integrated into the thermal circuit of a steam turbine, has been formulated and solved. PT-60/70-130/13 when operating in a mode with minor changes in the rotary control diaphragm. The turbine unit supplied steam to the boilers and ensured heat supply on a schedule of 150 / 70 ºС. The characteristics of ALBHP were modeled using the approximate deposits based on the characteristics of thermotransformers. The ALBHP was heated by steam from a vibrating turbine after a steam propeller machine installed for energy saving. A complete optimization task with the function of changing the monthly burning costs after the integration of ALBHP, based on the average monthly temperature of the current air in the burning season in Ukraine, was divided into 6 additional optimization tasks. The control parameters for these tasks were: thermal pressure of the ALBHP, steam pressure at the turbine condenser and at the inlet of the heat pump, steam loss into the turbine head. This problem was solved using the coordinate descent method. The following modes were monitored with steam rates at the same time as turbine selection for employees: 15, 30 and 45 t/h (with parameters: 1.296 MPa, 280 ºС) and network water: 1600, 1650 and 1700 m³/h. Their peculiarity is the provision of “bark” generation in the volumes that robots demonstrate PT-60/70-130/13 without ALBHP with a closed rotary diaphragm. For all considered options for turbine installation, the optimal intensity of the integrated ALBHP is set at 20 MW. During the burning period, PT-60/70-130/13 with ALBHP 20 MW when operating in a mode close to thermal heating with less waste of generator steam and network water, allows you to save: burning ~3.5%, blended water 8.5%, technical water 79.9%, and also gives a significant environmental effect due to the reduction of liquid waste to the atmosphere. The leading line of ALBHP capacity is close to 3 rocks. It appears that the option of a robotic integrated turbine with a partially open regulating diaphragm, for obvious prices for fuel and electricity, produces according to economic indicators the option with a closed diaphragm.

Keywords: energy saving, absorption heat pump, thermal circuit of a steam turbine.

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Received 01 September 2024

Published 30 December 2024