The Impact of Condensing Pressure on the Performance of Solar Solid Adsorption Refrigeration System

2015 ◽  
Vol 1092-1093 ◽  
pp. 109-112
Author(s):  
Xiang Bo Song ◽  
Xu Ji ◽  
Ming Li ◽  
Jia Xing Liu ◽  
Shao Lin Yin
Keyword(s):  
Working Conditions ◽  
System Performance ◽  
Refrigeration System ◽  
Adsorption Refrigeration ◽  
Bed Temperature ◽  
Temperature And Pressure ◽  
Condensing Pressure ◽  
The Impact

A new solar solid adsorption refrigeration system is established in this paper, and the variation relationship between the adsorbent bed temperature and pressure with time are analyzed, and the effects of adsorbent bed condensing pressure on the system performance is researched. Results show that, under the same working conditions, when the condensing pressure is 39 kPa, the daily ice-making capacity of system reach to 5.5 kg with the refrigerating capacity of 2.26 MJ; And when the condensing pressure is 63 kPa, the ice-making capacity of system is only for 3 kg with the refrigerating capacity of 1.48 MJ; The refrigerating capacity of the former is 1.5 times of the latter.

Investigation on Influence of Solar Radiation on Performance of Solar Adsorption Refrigeration System

2014 ◽  
Vol 953-954 ◽  
pp. 57-60
Author(s):  
Xiang Bo Song ◽  
Xu Ji ◽  
Ming Li ◽  
Jie Qing Fan ◽  
Bin Luo ◽  
...  
Keyword(s):  
Solar Radiation ◽  
System Performance ◽  
Refrigeration System ◽  
Adsorption Refrigeration ◽  
Bed Temperature ◽  
The Relationship

This article conducts the research on the relationship between the solar radiation and the adsorption bed temperature, the adsorption bed pressure and the system performance, and obtains that the solar radiation indirectly influences the system refrigeration performance through influencing the adsorption bed temperature and adsorption bed pressure. And in a certain range, the bigger solar radiation is, the higher adsorption bed temperature is, the system refrigeration efficiency is higher, the maximum refrigeration efficiency is 0.122.

Mathematical Analysis on a Special Adsorption Refrigeration System Suitable for Solar Energy System

2014 ◽  
Vol 953-954 ◽  
pp. 119-122
Author(s):  
Yan Ling Liu ◽  
Xue Zeng Shi ◽  
Yuan Yu
Keyword(s):  
System Performance ◽  
Energy System ◽  
Cooling Capacity ◽  
Refrigeration System ◽  
Adsorption Refrigeration ◽  
Study Results ◽  
Actual Use ◽  
Working Principle ◽  
Set Up ◽  
New System

s. In this paper, a new adsorption refrigeration system is designed and calculated. In this system, there are two beds, two condensers and two evaporators. The working principle is explained and specified in this paper. And mathematical models are also set up and through calculation, the system performance is analyzed and evaluated.Theory study results demonstrate that the new system nearly has the same cooling capacity as conventional system and this kind of system can be adopted in actual use.

Design and Analysis of Cooling Cabinet for Vaccine Storage

2014 ◽  
Vol 984-985 ◽  
pp. 1180-1183
Author(s):  
N. Saravanan ◽  
R. Rathnasamy ◽  
V. Ananchasivan
Keyword(s):  
Mathematical Model ◽  
Cooling Effect ◽  
Refrigeration System ◽  
Ansys Software ◽  
Adsorption Refrigeration ◽  
Ammonia Adsorption ◽  
Energy Demands ◽  
Solar Intensity ◽  
Solar Powered ◽  
The Impact

Solar powered adsorption refrigeration system is renewable source in the future energy demands and more useful for off-grid area. In this paper a mathematical model was developed to investigate the performance of a cooling cabinet of a activated carbon-ammonia adsorption refrigeration system, and a new effective method about the refrigeration studies. A brief thermodynamic study of the cooling cabinet is carried out and the effect of operating parameters such as temperature, pressure, cooling effect of the system is numerically analyzed. The impact of solar intensity on performance of the system is significant. The cooling cabinet model is completely analysied for varies capacity and it is able to calculate the cooling cabinet coil length .The designed mathematical model is analyzed by the use of coolpack software and the results are compared with ansys software. It is observed that the system operate more efficient while maximum solar intensity and the cooling effect. Key words: Solar, Adsorption Refrigeration, Mathematical model, Analysis, Solar intensity.

scholarly journals Thermal Prospective Estimations of COP and TR for R12 and HR12 Vapour Compression Refrigeration Systems

2019 ◽  
Vol 9 (2) ◽  
pp. 897-902
Keyword(s):  
Performance Evaluation ◽  
Power Consumption ◽  
Linear Relationship ◽  
System Performance ◽  
Graphical Representation ◽  
Refrigeration System ◽  
Energy Meter ◽  
Temperature And Pressure ◽  
Vapour Compression ◽  
System Performance Evaluation

Experimentations got executed for investigating influence of R12 and HR12 refrigerants on system performance evaluation in terms of COP and TR. Temperature and pressure got measured by different temperature and pressure gauges mounted at several predetermined locations. Additionally, power consumption by refrigeration system also got measured from the installed energy meter readings. Altogether, it summarizes the tabular inscriptions of the variations of COPth, COPact and COPrel with TR for R12 and HR12 refrigerants. Besides, it also demonstrates the graphical representation of the corresponding variations of COPth, COPact and COPrel with TR for R12 and HR12 refrigerants. As expected, it stands observed (from both the stated table and figure) that both COPth and COPact increase with TR, however, the COPrel decreases with the same for said R12 and HR12 refrigerants. Furthermore, the stated variations of COPth, COPact and COPrel with TR remain observed as approximately linear, independently. That’s why, both COPth and COPact stay directly proportional to TR, however, the COPrel stays inversely proportional to the same because of approximately linear relationship between the COPth, COPact and COPrel with TR, individually. Additionally, COPact decreases with the increase of Wi/p for both R12 and HR12 refrigerants. However, Qext increases with Wi/p for both R12 and HR12 refrigerants.

scholarly journals Influential factors and optimization analysis of adsorption refrigeration system performance

AIP Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 105315
Author(s):  
Xueling Zhang ◽  
Feifei Wang ◽  
Xudong Lei ◽  
Yanling Wang ◽  
Qi Zhang ◽  
...  
Keyword(s):  
System Performance ◽  
Influential Factors ◽  
Refrigeration System ◽  
Adsorption Refrigeration ◽  
Optimization Analysis

Study on Solar Energy for Pre-Cooling Technology of Fruit and Vegetable

2014 ◽  
Vol 700 ◽  
pp. 37-41
Author(s):  
A Min Ji ◽  
Tian Tian ◽  
Bo Ning Tang
Keyword(s):  
Mathematical Model ◽  
Activated Carbon ◽  
Solar Energy ◽  
System Performance ◽  
Refrigeration System ◽  
Adsorption Refrigeration ◽  
Vacuum Tube ◽  
Rate Versus ◽  
Adsorption Temperature ◽  
Cooling Technology

This paper discusses the importance of per-cooling vegetable and fruit, establishes a mathematical model of the solar adsorption refrigeration system collector bed. It applies activated carbon - methanol as working pairs, takes solar vacuum tube－water cooled collector bed for refrigerating, adsorption temperature and adsorption rate versus time are calculated , draw the corresponding curve figure. Analyses solar adsorption refrigeration system performance and puts forward the improvement direction.

scholarly journals Influence of initial bed temperature on bed performance of an adsorption refrigeration system

2018 ◽  
Vol 22 (6 Part A) ◽  
pp. 2583-2595 ◽  
Author(s):  
Anirban Sur ◽  
Randip Das ◽  
Ramesh Sah
Keyword(s):  
Activated Carbon ◽  
Cycle Time ◽  
Cooling System ◽  
Cooling Capacity ◽  
Heat Transfer Fluid ◽  
Low Grade ◽  
Refrigeration System ◽  
Adsorption Refrigeration ◽  
Bed Temperature ◽  
Engineering Department

The study deals with the complete dynamic analysis (numerical and practical) of an existing adsorption refrigeration system. The adsorption refrigeration setup is available at Indian School of Mines (Dhanbad, India), Mechanical engineering department. The system operates with activated carbon (as an adsorbent) and methanol (as refrigerant).Numerical model is established base on energy equation of the heat transfer fluid (water) and transient heat and mass transfer equations of the adsorbent bed. The input temperature of heat source is 90?C, which is very low compared to other low-grade energy input refrigeration system. The thermo-physical properties of an adsorptive cooling system (using activated carbon?methanol pair) are considered in this model. In this analysis influence of initial bed temperature (T1) on the bed performances are analysed mathematically and experimentally. The simulation and practical results of this system show that the cycle time decreases with increase in initial bed temperature and the minimum cycle time is 10.74 hours (884 minutes for practical cycle) for initial bed temperature of 40?C. Maximum system COP and specific cooling capacity are 0.436 and 94.63 kJ/kg of adsorbent under a condenser and evaporator temperatures of 35?C and 5?C, respectively. This analysis will help to make a comparison between simulated and experimental results of a granular bed adsorption refrigeration system and also to meet positive cooling needs in off-grid electricity regions.

Experimental Investigation of the Parameters Influencing Refrigerant Migration in a Refrigeration System

2007 ◽  
Author(s):  
Serdar Kocaturk ◽  
Yalcin Guldali ◽  
A. Nilufer Egrican
Keyword(s):  
Experimental Parameter ◽  
Solenoid Valve ◽  
Experimental Facility ◽  
Refrigeration System ◽  
Pressure Equalization ◽  
Cycling Frequency ◽  
Temperature And Pressure ◽  
Set Up ◽  
Compressor Power ◽  
Condensing Pressure

Refrigerant migration, which is characterized by the pressure equalization between condenser and evaporator during compressor off period, is one of the most effective cycling losses phenomena with the cause of 5–15% increasing rates in the energy consumption of a refrigeration system. In this study, an experimental facility was set up to investigate the parameters influencing refrigerant migration. A freezer cabinet with wire&tube evaporator and R600a and R134a reciprocating compressors were used. For the detailed control of various condensing parameters (condensing temperature, pressure, condensing rate in the condenser) a double-tube water-cooled condenser was designed. The condenser was constructed to allow the application of various lengths. Temperature and pressure values on various points of the system, refrigerant mass-flow rate, compressor power and consumed energy values were measured simultaneously. Condensing pressure and condensing rate in the condenser, condenser length, cycling frequency, refrigerant type used in the system, and ambient temperature were investigated as parameters influencing refrigerant migration. Refrigerant migration during the off period was blocked with a solenoid valve that is located before the inlet of the expansion device, and energy consumptions and COP values were mainly compared for the opened-valve and closed-valve conditions for each controlled experimental parameter.

scholarly journals Experimental Performance Determination of COP and TR for R12 Vapour Compression Refrigeration System

2019 ◽  
Vol 9 (2) ◽  
pp. 887-891
Keyword(s):  
Performance Evaluation ◽  
System Performance ◽  
Graphical Representation ◽  
Refrigeration System ◽  
Experimental Performance ◽  
Energy Meter ◽  
Temperature And Pressure ◽  
Vapour Compression ◽  
System Performance Evaluation

Experiments stand performed for investigating influence of R12 refrigerant on system performance evaluation in terms of COP and TR. Temperature and pressure got measured by different temperature and pressure gauges mounted at several predetermined locations. Additionally, power consumption by refrigeration system also got measured from the installed energy meter readings. Altogether, it summarizes the tabular inscriptions of the variations of COPth, COPact and COPrel with TR for R12 refrigerant. Besides, it also demonstrates the graphical representation of the corresponding variations of COPth, COPact and COPrel with TR for R12 refrigerant. As expected, it stands observed (from both the stated table and figure) that both COPth and COPact increase with TR, however, the COPrel decreases with the same for said R12 refrigerant. Furthermore, the stated variations of COPth, COPact and COPrel with TR remain observed as approximately linear, independently. That’s why, both COPth and COPact stay directly proportional to TR, however, the COPrel stays inversely proportional to the same because of approximately linear relationship between the COPth, COPact and COPrel with TR, independently.

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