scholarly journals Performance comparison of Closed Loop Heat Pump Dryer with Bed, Tray and Bed-Tray Dryer for Curry Leaves

2021 ◽  
Author(s):  
Ashok Kumar M ◽  
Kumaresan G ◽  
Rajakarunakaran S ◽  
Sivakumar V
Keyword(s):  
Heat Pump ◽  
Closed Loop ◽  
Performance Comparison ◽  
Curry Leaves

Exergy-Based Ecological Optimization of an Irreversible Quantum Carnot Heat Pump with Spin-1/2 Systems

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaowei Liu ◽  
Lingen Chen ◽  
Yanlin Ge ◽  
Huijun Feng ◽  
Feng Wu ◽  
...  
Keyword(s):  
Heat Pump ◽  
Performance Comparison ◽  
Ecological Function ◽  
Performance Characteristics ◽  
Numerical Examples ◽  
Ecological Performance ◽  
Special Cases ◽  
Heating Load ◽  
Ecological Optimization

AbstractBased on an irreversible quantum Carnot heat pump model in which spin-1/2 systems are used as working substance, an exergy-based ecological function and some other important parameters of the model heat pump are derived. Numerical examples are provided to investigate its ecological performance characteristics. The influences of various irreversibility factors on the ecological performance are discussed. Performance comparison and discussion among maximum points of ecological function, heating load, and so on, are conducted. At last, three special cases are discussed.

Process simulation and analysis of a closed-loop heat pump clothes dryer

2021 ◽  
pp. 117545
Author(s):  
Xiang Cao ◽  
Jing Zhang ◽  
Zhen-Yu Li ◽  
Liang-Liang Shao ◽  
Chun-Lu Zhang
Keyword(s):  
Heat Pump ◽  
Process Simulation ◽  
Closed Loop ◽  
Clothes Dryer

scholarly journals Small Signal Modeling and Analysis of a Dual Input Interleaved DC-DC Converter

2020 ◽  
Vol 8 (6) ◽  
pp. 5402-5411
Keyword(s):  
Performance Analysis ◽  
Closed Loop ◽  
Dynamic Performance ◽  
Energy System ◽  
Vital Role ◽  
Performance Comparison ◽  
Small Signal ◽  
Solar Pv ◽  
Modeling And Analysis ◽  
Hybrid Energy

The idea of DC-DC converter with multi-input is yet to attain a vital role in the field of 'hybrid energy system (HES)' integration and electric vehicle applications. So, the analysis of the dynamic behavior of the multi input converters is crucial in designing a proper controller to achieve a stable performance. This paper reports a 'small signal model (SSM)' and the performance analysis of a 'dual-input DC-DC converter (DIC)'. The parasitic resistances of capacitor and inductor are considered in the modelling. The significant transfer function (TF)s are derived with the help of the SSM, and the Bode plots for the TFs have been obtained. The performance analysis shows that the derived TFs allow better closed loop performance of the system. The simulation of the DIC converter in MATLAB/ Simulink® has been carried out and the simulation waveforms are presented. A hardware setup of the DIC converter is fabricated and experimented in the laboratory. The dynamic performance of the DIC is analyzed under the variations in the source and load conditions. The presented converter with a closed loop controller can be used in the applications to formulate a HES with solar-PV, battery, fuel cell, etc. Also the performance comparison of the DIC converter has been performed with other reported converters which shows that the DIC converter has higher efficiency and several other potential merits.

On-Vehicle Performance Comparison of an R-152a and R-134a Heat Pump System

2003 ◽  
Author(s):  
Lawrence P. Scherer ◽  
Mahmoud Ghodbane ◽  
James A. Baker ◽  
Prasad S. Kadle
Keyword(s):  
Heat Pump ◽  
Performance Comparison ◽  
Pump System ◽  
Vehicle Performance ◽  
Heat Pump System ◽  
R 134A

scholarly journals Evaluation of Suitable Areas to Introduce a Closed-Loop Ground Source Heat Pump System in the Case of a Standard Japanese Detached Residence

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4294
Author(s):  
Gaurav Shrestha ◽  
Mayumi Yoshioka ◽  
Hikari Fujii ◽  
Youhei Uchida
Keyword(s):  
Heat Exchange ◽  
Heat Pump ◽  
Closed Loop ◽  
Ground Source Heat Pump ◽  
Standard Size ◽  
Pump System ◽  
Heat Pump System ◽  
The North ◽  
Ground Source ◽  
Suitability Map

Evaluation of appropriate areas to introduce a closed-loop ground-source heat pump (GSHP) system in the case of a standard detached residence was conducted in Akita Plain, Japan. Depth of borehole heat exchanger (BHE) required to use a GSHP system was taken as the suitability index, which is simpler for the general public to understand and to promote the system. Heating and cooling loads of the standard size detached residence were calculated based on the 2013 Energy Conservation Standard. To estimate BHE depths and estimate a suitable area, identical 3D BHE models were constructed at 30 points in the plain. Required BHE depths were determined by performing heat exchange simulations at each location using the calculated loads and heat exchange rates. A suitability map showing distribution of the required BHE depths was prepared. BHE depths were shorter in the north-western area compared to the other parts, implying that the coastal lowlands in this area are more suitable for closed-loop system in the standard detached residences in terms of heat exchange performance as well as the cost reduction. Thickly distributed Quaternary System with higher thermal conductivity is contributing to shorter BHE depths. The suitability map is effective to adopt potential areas for the system installation in the standard detached Japanese residences.

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