Thermal performance of triplex-tube latent heat storage exchanger: simultaneous heat storage and hot water supply via condensation heat recovery
In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) h...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Cao, Xiaoling [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2020transfer abstract |
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| Schlagwörter: |
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| Umfang: |
10 |
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| Übergeordnetes Werk: |
Enthalten in: Technologies and practice of CO - HU, Yongle ELSEVIER, 2019, an international journal : the official journal of WREN, The World Renewable Energy Network, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:157 ; year:2020 ; pages:616-625 ; extent:10 |
| Links: |
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| DOI / URN: |
10.1016/j.renene.2020.05.059 |
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| Katalog-ID: |
ELV050688642 |
|---|
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| 245 | 1 | 0 | |a Thermal performance of triplex-tube latent heat storage exchanger: simultaneous heat storage and hot water supply via condensation heat recovery |
| 264 | 1 | |c 2020transfer abstract | |
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| 520 | |a In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. | ||
| 520 | |a In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. | ||
| 650 | 7 | |a Phase change |2 Elsevier | |
| 650 | 7 | |a Triplex tube heat exchanger |2 Elsevier | |
| 650 | 7 | |a Latent heat thermal energy storage |2 Elsevier | |
| 650 | 7 | |a Heat recovery |2 Elsevier | |
| 700 | 1 | |a Zhang, Nan |4 oth | |
| 700 | 1 | |a Yuan, Yanping |4 oth | |
| 700 | 1 | |a Luo, Xiaolong |4 oth | |
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10.1016/j.renene.2020.05.059 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001048.pica (DE-627)ELV050688642 (ELSEVIER)S0960-1481(20)30757-6 DE-627 ger DE-627 rakwb eng Cao, Xiaoling verfasserin aut Thermal performance of triplex-tube latent heat storage exchanger: simultaneous heat storage and hot water supply via condensation heat recovery 2020transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. Phase change Elsevier Triplex tube heat exchanger Elsevier Latent heat thermal energy storage Elsevier Heat recovery Elsevier Zhang, Nan oth Yuan, Yanping oth Luo, Xiaolong oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:157 year:2020 pages:616-625 extent:10 https://doi.org/10.1016/j.renene.2020.05.059 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 157 2020 616-625 10 |
| spelling |
10.1016/j.renene.2020.05.059 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001048.pica (DE-627)ELV050688642 (ELSEVIER)S0960-1481(20)30757-6 DE-627 ger DE-627 rakwb eng Cao, Xiaoling verfasserin aut Thermal performance of triplex-tube latent heat storage exchanger: simultaneous heat storage and hot water supply via condensation heat recovery 2020transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. Phase change Elsevier Triplex tube heat exchanger Elsevier Latent heat thermal energy storage Elsevier Heat recovery Elsevier Zhang, Nan oth Yuan, Yanping oth Luo, Xiaolong oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:157 year:2020 pages:616-625 extent:10 https://doi.org/10.1016/j.renene.2020.05.059 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 157 2020 616-625 10 |
| allfields_unstemmed |
10.1016/j.renene.2020.05.059 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001048.pica (DE-627)ELV050688642 (ELSEVIER)S0960-1481(20)30757-6 DE-627 ger DE-627 rakwb eng Cao, Xiaoling verfasserin aut Thermal performance of triplex-tube latent heat storage exchanger: simultaneous heat storage and hot water supply via condensation heat recovery 2020transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. Phase change Elsevier Triplex tube heat exchanger Elsevier Latent heat thermal energy storage Elsevier Heat recovery Elsevier Zhang, Nan oth Yuan, Yanping oth Luo, Xiaolong oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:157 year:2020 pages:616-625 extent:10 https://doi.org/10.1016/j.renene.2020.05.059 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 157 2020 616-625 10 |
| allfieldsGer |
10.1016/j.renene.2020.05.059 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001048.pica (DE-627)ELV050688642 (ELSEVIER)S0960-1481(20)30757-6 DE-627 ger DE-627 rakwb eng Cao, Xiaoling verfasserin aut Thermal performance of triplex-tube latent heat storage exchanger: simultaneous heat storage and hot water supply via condensation heat recovery 2020transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. Phase change Elsevier Triplex tube heat exchanger Elsevier Latent heat thermal energy storage Elsevier Heat recovery Elsevier Zhang, Nan oth Yuan, Yanping oth Luo, Xiaolong oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:157 year:2020 pages:616-625 extent:10 https://doi.org/10.1016/j.renene.2020.05.059 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 157 2020 616-625 10 |
| allfieldsSound |
10.1016/j.renene.2020.05.059 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001048.pica (DE-627)ELV050688642 (ELSEVIER)S0960-1481(20)30757-6 DE-627 ger DE-627 rakwb eng Cao, Xiaoling verfasserin aut Thermal performance of triplex-tube latent heat storage exchanger: simultaneous heat storage and hot water supply via condensation heat recovery 2020transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. Phase change Elsevier Triplex tube heat exchanger Elsevier Latent heat thermal energy storage Elsevier Heat recovery Elsevier Zhang, Nan oth Yuan, Yanping oth Luo, Xiaolong oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:157 year:2020 pages:616-625 extent:10 https://doi.org/10.1016/j.renene.2020.05.059 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 157 2020 616-625 10 |
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Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. 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thermal performance of triplex-tube latent heat storage exchanger: simultaneous heat storage and hot water supply via condensation heat recovery |
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Thermal performance of triplex-tube latent heat storage exchanger: simultaneous heat storage and hot water supply via condensation heat recovery |
| abstract |
In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. |
| abstractGer |
In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. |
| abstract_unstemmed |
In refrigeration system, refrigerant condensing will release a lot of heat. Using condensation heat from cold storage refrigeration system to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation, and latent heat thermal energy storage (LHTES) has unique advantages. Compared with the shell-and-tube heat exchanger, the triplex-tube heat exchanger (TTHE) can achieve simultaneous heat storage and hot water preparation, but few studies have investigated the thermal performance. A mathematical model of TTHE is established by enthalpy method, and the dynamic characteristics has been studied. The results show that liquid sensible heat transfer, latent heat transfer and solid sensible heat transfer are three stages experience in the whole process. The heat storage rate increases and the heat release rate decreases gradually with the opposite trend, but finally reaches to balance with a stable value. The higher the HTF inlet temperature is, the higher the outlet temperature is, but the temperature difference in stable stage is smaller. With the increase of mass flow rate, its effect on heat release gradually weakened. Under the calculation conditions, phase change material with 80 °C transformation temperature for cold storage refrigeration system condensing heat recovery is reasonable. |
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