Experimental and Numerical Study of Thermal Performance of an Innovative Waste Heat Recovery System
One of the biggest challenges the world is facing these days is to reduce the greenhouse gases emissions in order to prevent the global warming. Since a significant quantity of CO<sub>2</sub> emissions is the result of the energy producing process required in industry or buildings, the w...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-12-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/11/23/11542 |
| _version_ | 1797507979820400640 |
|---|---|
| author | Robert Stefan Vizitiu Andrei Burlacu Cherifa Abid Marina Verdes Marius Costel Balan Marius Branoaea |
| author_facet | Robert Stefan Vizitiu Andrei Burlacu Cherifa Abid Marina Verdes Marius Costel Balan Marius Branoaea |
| author_sort | Robert Stefan Vizitiu |
| collection | DOAJ |
| description | One of the biggest challenges the world is facing these days is to reduce the greenhouse gases emissions in order to prevent the global warming. Since a significant quantity of CO<sub>2</sub> emissions is the result of the energy producing process required in industry or buildings, the waste heat recovery is an important aspect in the fight for preserving the planet. In this study, an innovative waste heat recovery system which can recover waste heat energy from cooling liquids used in industry or in different processes, was designed and subjected to experimental investigations. The equipment uses heat pipes to capture thermal energy from the residual fluids transiting the evaporator zone and transfer it to the cold water transiting the condenser zone. The efficiency of the heat exchanger was tested in 9 scenarios, by varying the temperature of the primary agent to 60, 65 and 70 °C and the volume flow rate of the secondary agent to 1, 2 and 3 L/min. The temperature of the secondary agent and the volume flow rate of the primary agent were kept constant at 10 °C, respectively 24 L/min. The results were later validated through numerical simulations, and confirmed that the equipment can easily recover waste thermal energy from used water with low and medium temperatures at very low costs compared to the traditional heat exchangers. The results were promising, revealing an efficiency of the equipment up to 76.7%. |
| first_indexed | 2024-03-10T04:56:06Z |
| format | Article |
| id | doaj.art-4c2efa7ff695482dad19bca3572b8b10 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T04:56:06Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-4c2efa7ff695482dad19bca3572b8b102023-11-23T02:09:59ZengMDPI AGApplied Sciences2076-34172021-12-0111231154210.3390/app112311542Experimental and Numerical Study of Thermal Performance of an Innovative Waste Heat Recovery SystemRobert Stefan Vizitiu0Andrei Burlacu1Cherifa Abid2Marina Verdes3Marius Costel Balan4Marius Branoaea5Faculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, RomaniaFaculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, RomaniaIUSTI Laboratory, Aix-Marseille University, 13453 Marseille, FranceFaculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, RomaniaFaculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, RomaniaFaculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, RomaniaOne of the biggest challenges the world is facing these days is to reduce the greenhouse gases emissions in order to prevent the global warming. Since a significant quantity of CO<sub>2</sub> emissions is the result of the energy producing process required in industry or buildings, the waste heat recovery is an important aspect in the fight for preserving the planet. In this study, an innovative waste heat recovery system which can recover waste heat energy from cooling liquids used in industry or in different processes, was designed and subjected to experimental investigations. The equipment uses heat pipes to capture thermal energy from the residual fluids transiting the evaporator zone and transfer it to the cold water transiting the condenser zone. The efficiency of the heat exchanger was tested in 9 scenarios, by varying the temperature of the primary agent to 60, 65 and 70 °C and the volume flow rate of the secondary agent to 1, 2 and 3 L/min. The temperature of the secondary agent and the volume flow rate of the primary agent were kept constant at 10 °C, respectively 24 L/min. The results were later validated through numerical simulations, and confirmed that the equipment can easily recover waste thermal energy from used water with low and medium temperatures at very low costs compared to the traditional heat exchangers. The results were promising, revealing an efficiency of the equipment up to 76.7%.https://www.mdpi.com/2076-3417/11/23/11542waste heat recoveryheat pipeenergy efficiency |
| spellingShingle | Robert Stefan Vizitiu Andrei Burlacu Cherifa Abid Marina Verdes Marius Costel Balan Marius Branoaea Experimental and Numerical Study of Thermal Performance of an Innovative Waste Heat Recovery System Applied Sciences waste heat recovery heat pipe energy efficiency |
| title | Experimental and Numerical Study of Thermal Performance of an Innovative Waste Heat Recovery System |
| title_full | Experimental and Numerical Study of Thermal Performance of an Innovative Waste Heat Recovery System |
| title_fullStr | Experimental and Numerical Study of Thermal Performance of an Innovative Waste Heat Recovery System |
| title_full_unstemmed | Experimental and Numerical Study of Thermal Performance of an Innovative Waste Heat Recovery System |
| title_short | Experimental and Numerical Study of Thermal Performance of an Innovative Waste Heat Recovery System |
| title_sort | experimental and numerical study of thermal performance of an innovative waste heat recovery system |
| topic | waste heat recovery heat pipe energy efficiency |
| url | https://www.mdpi.com/2076-3417/11/23/11542 |
| work_keys_str_mv | AT robertstefanvizitiu experimentalandnumericalstudyofthermalperformanceofaninnovativewasteheatrecoverysystem AT andreiburlacu experimentalandnumericalstudyofthermalperformanceofaninnovativewasteheatrecoverysystem AT cherifaabid experimentalandnumericalstudyofthermalperformanceofaninnovativewasteheatrecoverysystem AT marinaverdes experimentalandnumericalstudyofthermalperformanceofaninnovativewasteheatrecoverysystem AT mariuscostelbalan experimentalandnumericalstudyofthermalperformanceofaninnovativewasteheatrecoverysystem AT mariusbranoaea experimentalandnumericalstudyofthermalperformanceofaninnovativewasteheatrecoverysystem |