Improved model for calculating the coefficient of performance of a Peltier module

2000 ◽  
Vol 41 (2) ◽  
pp. 163-171 ◽  
Author(s):  
Gao Min ◽  
D.M Rowe
Keyword(s):  
Coefficient Of Performance ◽  
Peltier Module ◽  
Improved Model

scholarly journals A Report on Design & Setup of Peltier Module Based Air Cooler

2020 ◽  
Vol 9 (1) ◽  
pp. 2458-2463
Keyword(s):  
Common Knowledge ◽  
Coefficient Of Performance ◽  
Heat Radiation ◽  
Air Conditioners ◽  
Power Efficient ◽  
Capillary Tubing ◽  
Long Run ◽  
Peltier Module ◽  
Air Cooler ◽  
Manufacturing Techniques

With the increase in global warming levels day by day leading to the increase in average temperature throughout the year which makes people living in areas infested with loadshedding more hectic and troublesome. As the contemporary cooling method including Coolers and Air-conditioners do not work on the inverter for backup electricity purposes which make them useless as such during the peak heat hours. So, as to combat the problem with portability, economy and cost-effectiveness in mind the concept of alternative air conditioning using TEC while being used of the grid and rechargeable. While it is a common knowledge that co-efficient of performance of TEC is sub-par when compared to vapor compression air refrigeration used today but with optimized manufacturing techniques and forced convection of cold liquid increasing the effective cooling for the device and humidity controlling using moisture absorbent along with capillary tubing as thermal siphoning for heat reduction at the hot sink instead of air fin to reduce ambient heat radiation. Basically in this research we tried to increase the coefficient of performance of the Peltier Module using various techniques. The Module is also not power efficient , so in long run we can’t use plenty of them either two or three also we need to create the cooling effect . So keeping everything in mind we use the module accordingly to achieve the goal and make it a model for mass production

scholarly journals Effect of Water and Ethanol as Coolant on the Performance of Peltier Module for Cold Storage

2019 ◽  
Vol 8 (6) ◽  
pp. 1911-1913
Keyword(s):  
Heat Dissipation ◽  
Coefficient Of Performance ◽  
Liquid Cooling ◽  
Lower Efficiency ◽  
Peltier Module ◽  
Working Principle ◽  
Module Efficiency ◽  
Heating Up ◽  
Vapour Compression ◽  
Cooling Methods

The steep rise in earth temperature also tends to rise in energy consumption for the sake of which demand for cooling also increases. Various cooling equipment’s are available within the market within different working principle, in which vapour compression system being the most common. But due to its design it is not easy to make it portable in which use of Peltier comes in place. Peltier being solid state in nature also has a benefit of being small in size as well it runs completely on Direct current. But due to lower efficiency of Peltier module the use is limited to some specific purpose. The heat dissipation of Peltier is higher than that of the absorption which intends require continuous removal of heat. For which liquid cooling outperform all in coefficient of performance. There are various coolants that can be incorporated within the system, in which water being the most common. So as per this research, water is compared to that of ethanol which being less common in terms of coolant. The study majorly concerned into various analytical part used for the calculation of COP of Peltier module in both the cases. Since our system doesn’t concern about overall system performance at present it is only concerned with the module efficiency so system COP was omitted in case of calculation and comparison. In the study it was obtained that for water and ethanol subjected to both natural and fan assisted radiator cooling a COP of 0.402, 0.413, 0.409 and 0.412 was obtained respectively for both coolant and cooling methods. Water was found the most suitable medium of cooling in regard to ethanol as due to tendency of heating up.

An Improved Model for Short-Term Traffic Forecasting Considering Weather Impacts

CICTP 2017 ◽  
2018 ◽  
Author(s):  
Xinchao Chen ◽  
Si Qin ◽  
Jian Zhang ◽  
Huachun Tan ◽  
Yunxia Xu ◽  
...  
Keyword(s):  
Short Term ◽  
Traffic Forecasting ◽  
Improved Model ◽  
Weather Impacts

PENGARUH BEBAN PENDINGIN PADA MESIN PENKONDISIAN UDARA HIBRIDA DENGAN KONDENSOR DUMMY TIPE MULTI HELICAL COIL SEBAGAI WATER HEATER

2019 ◽  
Vol 17 (2) ◽  
pp. 69
Author(s):  
Afdhal Kurniawan Mainil ◽  
Sarwo Fikri ◽  
Azridjal Aziz
Keyword(s):  
Cooling Effect ◽  
Coefficient Of Performance ◽  
Helical Coil ◽  
Water Heater

Mesin pengkondisian udara umumnya digunakan untuk memberikan efek pendinginan (cooling effect). Efek pendinginan dimaksudkan untuk memberikan kenyamanan di ruang yang didinginkan, sehingga rasa nyaman membuat orang betah didalamnya. Mesin pengkondisian udara secara termodinamika kebanyakan beroperasi menggunakan siklus kompresi uap, dimana panas diserapkan disisi evaporator di dalam ruangan, kemudian panas tersebut dibuang di kondensor di luar ruangan. Proses tersebut dapat berlangsung karena kerja kompresor dan penurunan tekanan yang terjadi pada katup ekpansi atau pipa kapiler, sehingga siklus kompresi uap bekerja sempurna. Pada sistem pengkondisian udara biasanya panas terbuang kelingkungan begitu saja, panas tersebut dapat dimanfaatkan untuk memanaskan air dengan penambahan kondensor dummy. Penambahan kondensor dummy pada penelitian ini dilakukan untuk melihat pengaruh penambahan kondensor dummy terhadap beban pendingin, daya kompresi, temperatur, dan Coefficient of Performance (COP). Metode yang digunakan pada penelitian ini ialah metode rancang bangun dan eksperimental. Berdasarkan hasil pengujian, selama pengoperasian 120 menit diperoleh temperatur air panas pada  kondisi tanpa beban (0W), beban 1000W, 2000W dan 3000W berturut-turut adalah 52,83oC, 56,58oC, 57,93oC dan 64,73oC.

Improved Model for Vocal Folds with a Polyp with Potential Application

2020 ◽  
Author(s):  
Jônatas Santos ◽  
Jugurta Montalvão ◽  
Israel Santos
Keyword(s):  
Potential Application ◽  
Vocal Folds ◽  
Improved Model

scholarly journals Human Prehistoric Demography Revealed by the Polymorphic Pattern of CpG Transitions

2020 ◽  
Vol 37 (9) ◽  
pp. 2691-2698 ◽  
Author(s):  
Xiaoming Liu
Keyword(s):  
Population Dynamics ◽  
Population Expansion ◽  
Future Research ◽  
Human Populations ◽  
Neolithic Revolution ◽  
Cpg Sites ◽  
Hunting And Gathering ◽  
Genome Wide ◽  
Polymorphic Pattern ◽  
Improved Model

Abstract The prehistoric demography of human populations is an essential piece of information for illustrating our evolution. Despite its importance and the advancement of ancient DNA studies, our knowledge of human evolution is still limited, which is also the case for relatively recent population dynamics during and around the Holocene. Here, we inferred detailed demographic histories from 1 to 40 ka for 24 population samples using an improved model-flexible method with 36 million genome-wide noncoding CpG sites. Our results showed many population growth events that were likely due to the Neolithic Revolution (i.e., the shift from hunting and gathering to agriculture and settlement). Our results help to provide a clearer picture of human prehistoric demography, confirming the significant impact of agriculture on population expansion, and provide new hypotheses and directions for future research.

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