Theoretical Investigation and Analysis of Solar Thermoelectric Air-Conditioner

2014 ◽  
Vol 687-691 ◽  
pp. 3216-3220
Author(s):  
Hui Tian ◽  
Zhao Hui Qi ◽  
Zhong Zan Wang

With consideration of energy utilization and environmental protection, a solar thermoelectric air conditioner is designed, its composition characteristics, working principle is introduced, and factors that affect its performance have been analyzed theoretically.

2019 ◽  
Vol 7 (3) ◽  
pp. 163-176
Author(s):  
Felisa L. Sanico

This study investigated the perceptions of the faculty of members, school official and students in terms of environmental protection and management. It employed random sampling using survey questionnaires to gather data from the respondents. Frequency counts and percentage were used to process the data. Most of the respondents had positive responses on waste reduction and management, as the commonly used environmental protection strategy in the school. A majority of them rejected plastics and agreed that these are harmful to the environment friendly products, are materials that can be recycled, and less favored materials are the non-toxic products, and a majority of the respondents favored that individual bulk packaging is preferred than bulk packaging of products from suppliers. High percentage favored that the classrooms are designed to make use of natural ventilation and natural lighting. Most of the respondents had negative responses on the issue of planning the campus in such a way as to reduce the use of motor vehicle in terms of motor boat as mode of transportation. There was a high percentage of positive response regarding the physical greening of the school, as observed in the entire campus. A majority of the respondents had positive responses on fluorescent lamps as the commonly used source of light, than of the use of incandescent. Most of the respondents had negative response on artesian well as the source of water, and a high positive response was observed regarding local water works as the source of water for everyday use.  Majority of the respondents agreed that office machines are turned off when not in use, and using the fans whenever possible also had a high positive response; only fewer respondents agreed on the usage of air conditioner. A majority of the respondents agreed that white paper is the most preferred kind of paper in the school. A majority of the respondents had positive response in using the used paper in photocopying articles as commonly used paper recycling or use of reduction program. A majority of the respondents agreed that composting biodegradable was right in the campus and wet waste sent to recyclers had a low positive response. There was a high percentage of positive response on disposable plastic utensils as the most discouraged material in the canteen. Disposable cups, disposable plates, paper napkins and plastic wrappers had also high percentage as materials discouraged in the canteen. A majority of the respondents agreed that waste segregation in the school is practiced. Most of the respondents agreed that containers for biodegradable and non-biodegradable are provided in the entire campus. A majority of the respondents favored that biodegradable materials are made to compose. Respondents favored that sealing properly before disposal of hazardous/chemicals water is done inside the campus. All the eight (8) environment concerns/themes are integrated in the curriculum. A majority of the respondents indicated that environment concerns/themes are incorporated in Music, Health and Physical Education. They are also integrated in English, Social Studies, Pilipino, and Mathematics.


2002 ◽  
Vol 23 (2) ◽  
pp. 59-68 ◽  
Author(s):  
C. Lertsatitthanakorn ◽  
J. Hirunlabh ◽  
J. Khedari ◽  
M. Daguenet

2011 ◽  
Vol 308-310 ◽  
pp. 1710-1713
Author(s):  
Yuan De Dai ◽  
Xiao Ying Liang ◽  
Hai Cun Du

A prototype of photovoltaic semiconductor cooling box was designed based on the demand of energy saving and environmental protection. This paper presents the composition and working principle of the prototype. The data of the lowest internal temperature of the cooling box was gained by measuring the actual operational performance of the system at different ambient temperatures. And according to the experimental results, the coefficient of performance of the system was derived. The obtained results showed that the minimum air temperature inside the cooling box can be maintained within 6~10°Cand the coefficient of performance can reach up to 0. 28~0.32 in the hot summer days.


2014 ◽  
Vol 43 (6) ◽  
pp. 2179-2187 ◽  
Author(s):  
Alaa Attar ◽  
HoSung Lee ◽  
Sean Weera

Author(s):  
A. Anthony Adeyanju ◽  
K. Manohar

Thermoelectric devices use the Peltier effect which creates a heat flux between the junctions of two different types of materials. The thermoelectric module also referred to as a heat pump transfers heat from one side to the other when a DC current is applied. This study carried out the theoretical and experimental analysis of a thermoelectric air conditioning system. A prototype thermoelectric air conditioner of 286 W cooling capacity was built and a testing enclosure made from plywood and Styrofoam was also constructed in order to validate the theoretical result with an experimentation. It was discovered that thermoelectric air conditioning took 4 minutes to reach its desired temperature of 22℃ whereas the standard air conditioning system (Refrigeration Cycle) took 20 minutes to cool to a room temperature. Economically it was also discovered that thermoelectric air conditioning system is 50% cheaper than the refrigeration cycle air conditioning systems. The thermoelectric air conditioner has cheaper maintenance and greater estimated life span of 7 years more than the refrigeration air conditioner. This is because the air conditioner that operates on the refrigeration cycle uses a rotating compressor while the thermoelectric air conditioner uses thermometric module.


2014 ◽  
Vol 675-677 ◽  
pp. 440-443
Author(s):  
Rui Ying Lei ◽  
Yue Wang ◽  
Yong Feng Li

The beet sugar wastewater is a substance produced in the sugar process, which contains deep color and high concentration of nitrogen phosphorus and potassium. Treatments of beet sugar wastewater have been one of the most important challenges for environmental protection workers. Currently, treatments which are widely used in beet sugar wastewater processing are concentration drying, anaerobic method, aerobic method and incineration. The fundamental structure, working principle as well as hydraulic model of internal circulation (IC) reactor were introduced. The application and the possibility of using IC reactor to treat beet sugar wastewater were also concluded.


2018 ◽  
Vol 7 (4.35) ◽  
pp. 487
Author(s):  
A. Ashraf ◽  
M. Faisal ◽  
K. Parvin ◽  
Pin Jern Ker ◽  
M. A. Hannan

Smart load management system with an advanced metering infrastructure operates to monitor the electricity consumption by the load and transferring data to the utility grid. It has direct benefit to the end-users by managing the load. This system has incorporated with home appliance for achieving the goal of home energy management system (HEMS) such as efficient energy utilization of house by avoiding the wastage. Efficient loading system can strengthen the efficient power utilization and thus can save the economy greatly. Air conditioner (AC), thermostat associated with a room were selected for this purpose as they have the high demand of electricity consumption. This study mainly focuses on developing the mathematical model and simulate it for the considered home appliances to assess the trend of electricity consumption. Research proved that, considering the ambient temperature developed model can provide the specific instructions for automatic controlling of the appliances which will save the electricity consumption and utility bill of end-users compare to the manual operation of the system. Matlab /Simulink software was used to implement and justify the model.


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