Multi-Temperature Heat Pump with Cascade Compressor Connection
The object of the study is a multifunctional heat pump with several evaporators and condensers designed for simultaneous provision of technological processes with heat and cold. The aim of the work is the development and study of the scheme for this type of heat pumps, which ensures minimum irrevers...
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| Format: | Article |
| Language: | English |
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Academy of Sciences of Moldova
2017-08-01
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| Series: | Problems of the Regional Energetics |
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| Online Access: | http://journal.ie.asm.md/assets/files/10_02_34_2017.pdf |
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| author | Sit M.L. Starikov A.V. Zhuravleov A.A. Timchenko D.V. |
| author_facet | Sit M.L. Starikov A.V. Zhuravleov A.A. Timchenko D.V. |
| author_sort | Sit M.L. |
| collection | DOAJ |
| description | The object of the study is a multifunctional heat pump with several evaporators and condensers designed for simultaneous provision of technological processes with heat and cold. The aim of the work is the development and study of the scheme for this type of heat pumps, which ensures minimum irreversibility in the "compressor-gas coolers" chain, without the use of adjustable ejectors installed after evaporators and used as flow mixers. The obtained technical solution ensures the stabilization of the heat pump coefficient of performance (COP) and prescribed thermal regimes of heat exchangers at a variable flow rate of the refrigerant. The novelty of the elaboration is inclusion a compressor of the first stage with a serially connected intermediate heat exchanger and a control valve that are located before the compressor inlet of the second stage of the heat pump, which allows to establish a rational pressure after the first stage of the compressors. A scheme is proposed for regulating the temperature at the inlet of the first stage compressors by regulating the flow through the primary circuits of the recuperative heat exchangers. The first stage compressor control system allows providing the required modes of operation of the heat pump. It is established, because of the exergetic analysis of the sections of the hydraulic circuit of heat pump located between the evaporators and gas coolers that the reduction of irreversible losses in the heat pump is ensured due to the optimal choice of the superheat value of the gas after the evaporators. |
| format | Article |
| id | doaj-art-ea9ce227d1624fec9d7081de32f218bf |
| institution | DOAJ |
| issn | 1857-0070 |
| language | English |
| publishDate | 2017-08-01 |
| publisher | Academy of Sciences of Moldova |
| record_format | Article |
| series | Problems of the Regional Energetics |
| spelling | doaj-art-ea9ce227d1624fec9d7081de32f218bf2025-08-20T02:51:48ZengAcademy of Sciences of MoldovaProblems of the Regional Energetics1857-00702017-08-013429097Multi-Temperature Heat Pump with Cascade Compressor ConnectionSit M.L.0Starikov A.V.1Zhuravleov A.A.2Timchenko D.V.3Institute of Power Engineering of the Academy of Sciences of Moldova Kishinau, Republic of MoldovaSamara State Technical University2, Samara, Russian FederationInstitute of Power Engineering of the Academy of Sciences of Moldova Kishinau, Republic of MoldovaInstitute of Power Engineering of the Academy of Sciences of Moldova Kishinau, Republic of MoldovaThe object of the study is a multifunctional heat pump with several evaporators and condensers designed for simultaneous provision of technological processes with heat and cold. The aim of the work is the development and study of the scheme for this type of heat pumps, which ensures minimum irreversibility in the "compressor-gas coolers" chain, without the use of adjustable ejectors installed after evaporators and used as flow mixers. The obtained technical solution ensures the stabilization of the heat pump coefficient of performance (COP) and prescribed thermal regimes of heat exchangers at a variable flow rate of the refrigerant. The novelty of the elaboration is inclusion a compressor of the first stage with a serially connected intermediate heat exchanger and a control valve that are located before the compressor inlet of the second stage of the heat pump, which allows to establish a rational pressure after the first stage of the compressors. A scheme is proposed for regulating the temperature at the inlet of the first stage compressors by regulating the flow through the primary circuits of the recuperative heat exchangers. The first stage compressor control system allows providing the required modes of operation of the heat pump. It is established, because of the exergetic analysis of the sections of the hydraulic circuit of heat pump located between the evaporators and gas coolers that the reduction of irreversible losses in the heat pump is ensured due to the optimal choice of the superheat value of the gas after the evaporators.http://journal.ie.asm.md/assets/files/10_02_34_2017.pdfheat pumpasimulation |
| spellingShingle | Sit M.L. Starikov A.V. Zhuravleov A.A. Timchenko D.V. Multi-Temperature Heat Pump with Cascade Compressor Connection Problems of the Regional Energetics heat pump a simulation |
| title | Multi-Temperature Heat Pump with Cascade Compressor Connection |
| title_full | Multi-Temperature Heat Pump with Cascade Compressor Connection |
| title_fullStr | Multi-Temperature Heat Pump with Cascade Compressor Connection |
| title_full_unstemmed | Multi-Temperature Heat Pump with Cascade Compressor Connection |
| title_short | Multi-Temperature Heat Pump with Cascade Compressor Connection |
| title_sort | multi temperature heat pump with cascade compressor connection |
| topic | heat pump a simulation |
| url | http://journal.ie.asm.md/assets/files/10_02_34_2017.pdf |
| work_keys_str_mv | AT sitml multitemperatureheatpumpwithcascadecompressorconnection AT starikovav multitemperatureheatpumpwithcascadecompressorconnection AT zhuravleovaa multitemperatureheatpumpwithcascadecompressorconnection AT timchenkodv multitemperatureheatpumpwithcascadecompressorconnection |