Cooling Performance Assessment of a Slinky Closed Loop Lake Water Heat Pump System under the Climate Conditions of Pakistan
Abstract
:1. Introduction
2. Mathematical Modelling
2.1. Heat Transfer Model of Submerged Heat Exchanger (HX)
2.1.1. External Convection Heat Transfer Coefficient of Coil
2.1.2. Internal Convection Heat Transfer Coefficient of Coil
2.1.3. Overall Heat Transfer between the Submerged Coil and Lake Water
2.2. Heat Pump Performance Model
2.3. EES Modeling
3. Experimental Setup
3.1. Test Room Used for Experimental Purposes
3.2. Heat Pump/Reversible Vapor Compression System
3.3. Lake Water Heat Exchanger
3.4. Sensors
3.4.1. Temperature Sensors
3.4.2. Flow Meter
4. Results and Discussion
4.1. Effect of Lack Depth on Water Temperature
4.2. Effect of Heat Transfer Rate through Slinky Coils on Heat Transfer Coefficient
4.3. Performance Results of Heat Pump
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
Nomenclature
v | Kinematic Viscosity of lake water ] |
Rayleigh number | |
Parantal Number | |
Specific heat of water | |
μ | Dynamic viscosity of fluid [kg.m−1.s−1] |
Thermal Conductivity of water [W.m−1.K−1] | |
Outside Nusstlet Number | |
Internal Nusselt Number | |
Outside diameter of pipe [inch] | |
K | Thermal Conductivity of copper pipe |
Darcy friction factor | |
Renoyld Number | |
External convective coefficient of slinky coils | |
Internal convective coefficient of slinky coils | |
Effectiveness of submerged copper coils | |
g | Acceleration due to gravity ] |
α | Thermal diffusivity ] |
Internal thermal resistance of pipe | |
Thermal resistance of copper pipe | |
Thermal resistance outside the pipe |
Abbreviation
HDPE | High Density Polyethylene |
HVAC | Heating Ventilation and Air Conditioning |
LWHP | Lake water Heat Pump System |
LWT | Lake water temperatures [C] |
HTC | Overall heat transfer coefficient |
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Shahzad, M.K.; Rehan, M.A.; Ali, M.; Mustafa, A.; Abbas, Z.; Mujtaba, M.; Akram, M.I.; Yousaf, M.R. Cooling Performance Assessment of a Slinky Closed Loop Lake Water Heat Pump System under the Climate Conditions of Pakistan. Processes 2019, 7, 553. https://doi.org/10.3390/pr7090553
Shahzad MK, Rehan MA, Ali M, Mustafa A, Abbas Z, Mujtaba M, Akram MI, Yousaf MR. Cooling Performance Assessment of a Slinky Closed Loop Lake Water Heat Pump System under the Climate Conditions of Pakistan. Processes. 2019; 7(9):553. https://doi.org/10.3390/pr7090553
Chicago/Turabian StyleShahzad, Muhammad Kashif, Mirza Abdullah Rehan, Muzaffar Ali, Azeem Mustafa, Zafar Abbas, Muhammad Mujtaba, Muhammad Imran Akram, and Muhammad Rabeet Yousaf. 2019. "Cooling Performance Assessment of a Slinky Closed Loop Lake Water Heat Pump System under the Climate Conditions of Pakistan" Processes 7, no. 9: 553. https://doi.org/10.3390/pr7090553
APA StyleShahzad, M. K., Rehan, M. A., Ali, M., Mustafa, A., Abbas, Z., Mujtaba, M., Akram, M. I., & Yousaf, M. R. (2019). Cooling Performance Assessment of a Slinky Closed Loop Lake Water Heat Pump System under the Climate Conditions of Pakistan. Processes, 7(9), 553. https://doi.org/10.3390/pr7090553