A Numerical Study on System Performance of Groundwater Heat Pumps
Groundwater heat pumps have energy saving potential where the groundwater resources are sufficient. System Coefficients of Performance (COPs) are measurements of performance of groundwater heat pump systems. In this study, the head and power of submersible pumps, heat pump units, piping, and heat ex...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2015-12-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1996-1073/9/1/4 |
| _version_ | 1818040604264759296 |
|---|---|
| author | Jin Sang Kim Yujin Nam |
| author_facet | Jin Sang Kim Yujin Nam |
| author_sort | Jin Sang Kim |
| collection | DOAJ |
| description | Groundwater heat pumps have energy saving potential where the groundwater resources are sufficient. System Coefficients of Performance (COPs) are measurements of performance of groundwater heat pump systems. In this study, the head and power of submersible pumps, heat pump units, piping, and heat exchangers are expressed as polynomial equations, and these equations are solved numerically to determine the system performance. Regression analysis is used to find the coefficients of the polynomial equations from a catalog of performance data. The cooling and heating capacities of water-to-water heat pumps are determined using Energy Plus. Results show that system performance drops as the water level drops, and the lowest flow rates generally achieve the highest system performance. The system COPs are used to compare the system performance of various system configurations. The groundwater pumping level and temperature provide the greatest effects on the system performance of groundwater heat pumps along with the submersible pumps and heat exchangers. The effects of groundwater pumping levels, groundwater temperatures, and the heat transfer coefficient in heat exchanger on the system performance are given and compared. This analysis needs to be included in the design process of groundwater heat pump systems, possibly with analysis tools that include a wide range of performance data. |
| first_indexed | 2024-12-10T08:17:10Z |
| format | Article |
| id | doaj.art-54f6cad8aae44dcaa984611e0a361ab7 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-12-10T08:17:10Z |
| publishDate | 2015-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-54f6cad8aae44dcaa984611e0a361ab72022-12-22T01:56:27ZengMDPI AGEnergies1996-10732015-12-0191410.3390/en9010004en9010004A Numerical Study on System Performance of Groundwater Heat PumpsJin Sang Kim0Yujin Nam1Blue Economy Strategy Institute, Suite 911, 55 Digital-Ro 34-Gil, Seoul 08378, KoreaDepartment of Architectural Engineering, Pusan National University, Jangjun-2 Dong, Busan 609-735, KoreaGroundwater heat pumps have energy saving potential where the groundwater resources are sufficient. System Coefficients of Performance (COPs) are measurements of performance of groundwater heat pump systems. In this study, the head and power of submersible pumps, heat pump units, piping, and heat exchangers are expressed as polynomial equations, and these equations are solved numerically to determine the system performance. Regression analysis is used to find the coefficients of the polynomial equations from a catalog of performance data. The cooling and heating capacities of water-to-water heat pumps are determined using Energy Plus. Results show that system performance drops as the water level drops, and the lowest flow rates generally achieve the highest system performance. The system COPs are used to compare the system performance of various system configurations. The groundwater pumping level and temperature provide the greatest effects on the system performance of groundwater heat pumps along with the submersible pumps and heat exchangers. The effects of groundwater pumping levels, groundwater temperatures, and the heat transfer coefficient in heat exchanger on the system performance are given and compared. This analysis needs to be included in the design process of groundwater heat pump systems, possibly with analysis tools that include a wide range of performance data.http://www.mdpi.com/1996-1073/9/1/4groundwater heat pumpcoefficient of performanceregression analysisUA valueheat exchanger |
| spellingShingle | Jin Sang Kim Yujin Nam A Numerical Study on System Performance of Groundwater Heat Pumps Energies groundwater heat pump coefficient of performance regression analysis UA value heat exchanger |
| title | A Numerical Study on System Performance of Groundwater Heat Pumps |
| title_full | A Numerical Study on System Performance of Groundwater Heat Pumps |
| title_fullStr | A Numerical Study on System Performance of Groundwater Heat Pumps |
| title_full_unstemmed | A Numerical Study on System Performance of Groundwater Heat Pumps |
| title_short | A Numerical Study on System Performance of Groundwater Heat Pumps |
| title_sort | numerical study on system performance of groundwater heat pumps |
| topic | groundwater heat pump coefficient of performance regression analysis UA value heat exchanger |
| url | http://www.mdpi.com/1996-1073/9/1/4 |
| work_keys_str_mv | AT jinsangkim anumericalstudyonsystemperformanceofgroundwaterheatpumps AT yujinnam anumericalstudyonsystemperformanceofgroundwaterheatpumps AT jinsangkim numericalstudyonsystemperformanceofgroundwaterheatpumps AT yujinnam numericalstudyonsystemperformanceofgroundwaterheatpumps |