Suitability of Adaptive Self-Regulated e-Learning to Vocational Training

2015 ◽  
Vol 5 (3) ◽  
pp. 31-46 ◽  
Author(s):  
Aurora Dimache ◽  
Thomas Roche ◽  
Simone Kopeinik ◽  
Lisa Christina Winter ◽  
Alexander Nussbaumer ◽  
...  
Keyword(s):  
Heat Pump ◽  
Vocational Training ◽  
Learning Experience ◽  
Pump System ◽  
Heat Pump System ◽  
University Environment ◽  
Self Regulated Learning ◽  
Advantages And Disadvantages ◽  
E Learning ◽  
Level Of Knowledge

Many studies have been conducted, mainly in a university environment, and researchers have identified both advantages and disadvantages of e-learning. Very little is known about the applicability and suitability of e-learning to vocational and skills-based training. The research presented in this paper evaluates an adaptive e-learning model (INNOVRET) which combines skills-based learning by means of the Competence based Knowledge Space Theory (CbKST) with the principles of self-regulated learning (SRL) for a practically-oriented vocational training area, namely highly skilled heat pump system installation, in Ireland. The research methodology employed to carry out this study consists of a participative study to develop the INNOVRET approach for e-learning for heat pump systems installation and an empirical study carried out to evaluate the INNOVRET system. The results show that it is the IT skills of the installers that determine the way they perceive the system and the whole learning experience, as well as the level of knowledge acquired.

scholarly journals Enhancement of a R-410A Reclamation Process Using Various Heat-Pump-Assisted Distillation Configurations

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3776
Author(s):  
Nguyen Van Duc Long ◽  
Thi Hiep Han ◽  
Dong Young Lee ◽  
Sun Yong Park ◽  
Byeng Bong Hwang ◽  
...  
Keyword(s):  
Heat Pump ◽  
Cold Water ◽  
Operating Cost ◽  
Carbon Dioxide Emission ◽  
Hydraulic Turbine ◽  
Hot Water ◽  
Operating Pressure ◽  
Pump System ◽  
Heat Pump System ◽  
Advantages And Disadvantages

Distillation for R-410A reclamation from a waste refrigerant is an energy-intensive process. Thus, various heat pump configurations were proposed to enhance the energy efficiency of existing conventional distillation columns for separating R-410A and R-22. One new heat pump configuration combining a vapor compression (VC) heat pump with cold water and hot water cycles was suggested for easy operation and control. Both advantages and disadvantages of each heat pump configuration were also evaluated. The results showed that the mechanical vapor recompression heat pump with top vapor superheating saved up to 29.5%, 100.0%, and 10.5% of the energy required in the condenser duty, reboiler duty, and operating cost, respectively, compared to a classical heat pump system, and 85.2%, 100.0%, and 60.8%, respectively, compared to the existing conventional column. In addition, this work demonstrated that the operating pressure of a VC heat pump could be lower than that of the existing distillation column, allowing for an increase in capacity of up to 20%. In addition, replacing the throttle valve with a hydraulic turbine showed isentropic expansion can decrease the operating cost by up to 20.9% as compared to the new heat pump configuration without a hydraulic turbine. Furthermore, the reduction in carbon dioxide emission was investigated to assess the environmental impact of all proposed sequences.

Application Analysis of Pile Foundation Ground Source Heat Pump System

2013 ◽  
Vol 448-453 ◽  
pp. 2839-2842 ◽  
Author(s):  
Yun Zhun Fu ◽  
Xin Hui Du ◽  
Xu Zhang
Keyword(s):  
Heat Pump ◽  
Pile Foundation ◽  
Air Conditioning ◽  
Test Method ◽  
Buried Pipe ◽  
Pump System ◽  
Air Conditioning System ◽  
Heat Pump System ◽  
Advantages And Disadvantages ◽  
Pipe Heat

Pile foundation thermal response test method was adopted to measure the heat transfer capacity of the pile foundation U-pipe heat exchanger. The heat pump system of pile foundation buried pipe was designed. BIN method was adopted to calculate the annual dynamic load of office in Shanghai and annual energy consumption, and its energy-saving effect was determined by comparing with the air-cooled heat pump air conditioning system. Finally, annual cost method was employed to study the investment and annual operating expenses of pile foundation buried pipe heat pump air conditioner systems, and their economy, advantages and disadvantages by comparing with those of the air-cooled heat pump air conditioning system were analyzed.

scholarly journals Comparative Study Among Hybrid Ground Source Heat Pump System, Complete Ground Source Heat Pump and Conventional HVAC System

2011 ◽  
Author(s):  
Jiang Zhu ◽  
Yong Tao
Keyword(s):  
Heat Pump ◽  
Life Cycle Cost ◽  
Simulation Software ◽  
System Capacity ◽  
Ground Source Heat Pump ◽  
Hvac System ◽  
Pump System ◽  
Heat Pump System ◽  
Advantages And Disadvantages ◽  
Ground Source

In this paper, a hotel with hybrid geothermal heat pump system (HyGSHP) in the Pensacola is selected and simulated by the transient simulation software package TRNSYS [1]. To verify the simulation results, the validations are conducted by using the monthly average entering water temperature, monthly facility consumption data, and etc. Three types of HVAC systems are compared based on the same building model and HVAC system capacity. The results are presented to show the advantages and disadvantages of HyGSHP compared with the other two systems in terms of energy consumptions, life cycle cost analysis.

Application Analysis of Water Loop Heat Pump System Energy Conservation of a Sports Training Center

2014 ◽  
Vol 641-642 ◽  
pp. 938-941
Author(s):  
Hong Li Wang
Keyword(s):  
Heat Pump ◽  
Training Center ◽  
Sports Training ◽  
Pump System ◽  
Air Conditioning System ◽  
Heat Pump System ◽  
Advantages And Disadvantages ◽  
Application Analysis ◽  
Reduce Energy Consumption ◽  
Operation Characteristics

A sports training center training venues and office building adopting water loop heat pump system (WLHPS) are taken as examples, combined with the practical problems in design and operation, to analysis the operation characteristics of the air conditioning system and its advantages and disadvantages, and the energy saving operation strategy is put forward to further reduce energy consumption.

Economics Analysis of Sewage Source Heat Pump System

2009 ◽  
Author(s):  
Bing Wei ◽  
Bin Zhang ◽  
Lu Jiang ◽  
Wen Luo
Keyword(s):  
Heat Pump ◽  
Fossil Fuel ◽  
Operating Cost ◽  
Air Conditioner ◽  
Pump System ◽  
Heat Pump System ◽  
Advantages And Disadvantages ◽  
Annual Operating Cost ◽  
The Impact ◽  
Sewage Source

To sewage treatment plants, the sewage is plenteous and costless. If the sewage is utilized for air conditioning purpose, it will achieve more value. The temperature of sewage is basically constant in summer or winter. The treated sewage can be used for absorbing the condensing heat in summer and releasing heat to the building space in winter through the sewage heat exchanger. Especially the heating coefficient of the sewage source heat bump is higher in winter, which is an advantage to heating. In this paper the cooling and heating theory of the sewage source heat bump is briefly introduced, the advantages and disadvantages of sewage source heat bump system is explained. With an example in Beijing, China, compared with the boiler/ductless split air conditioner system, the initial investment and annual operating cost are calculated and the economics of the sewage source heat pump system is analyzed. At last the impact of fossil fuel rate and electric rate on the annual operating costs is analyzed. The calculating results showed that under the present rates of fossil fuel and electricity in China, the initial investment of the sewage source heat pump system is higher, the annual operating cost is lower than that of the boiler/ductless split air conditioner system. All these above will be good references for the actual applications of sewage source heat pump systems.

scholarly journals The Effectiveness of a Three-Temperature Heat Pump System

2018 ◽  
Author(s):  
Tomáš Stejskal ◽  
Jozef Svetlík ◽  
Peter Demeč ◽  
Miroslav Dovica ◽  
Miroslav Štofa ◽  
...  
Keyword(s):  
Heat Pump ◽  
Heat Engine ◽  
Stirling Engine ◽  
Thermal Source ◽  
Pump System ◽  
Heat Pump System ◽  
Heating Systems ◽  
Advantages And Disadvantages ◽  
System A ◽  
Temperature Heating

Three-temperature heating systems consist of a heat engine and a heat pump, enabling thus maximum usage of the primary thermal source for the heating of buildings. This analysis has revealed obvious advantages and disadvantages that the combining of thermodynamic systems has in future development, also with respect to environmental and economic issues. It appears that the combination of a Stirling engine or a similar heat drive with a heat pump is especially suitable. In order to analyze the effectiveness of such a system, a comprehensive calculation procedure is used: its basis lies in accounting for all types of energy and their relationship to the original natural resource. The present paper aims to point out that the combination of Stirling engine and a heat pump is a useful solution thanks to the most favorable resultant economic impact if compared to the usage of a diesel, four-stroke gas, or, most commonly used, electric drive.

Sewage Anti-Blocking Machine Principle and Double-Stage Pump Technology

2012 ◽  
Vol 424-425 ◽  
pp. 751-755
Author(s):  
Cheng Hu Zhang ◽  
Na Meng ◽  
De Xing Sun
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Advantages And Disadvantages ◽  
Key Technologies ◽  
Sewage Source

The sewage should be filtered to prevent the blockage of the heat exchanger before using. And the anti-blocking machine is the key device to prevent blocking in sewage source heat pump system. The paper introduces the development of the anti-blocking machine: intermittent backwashing, flat continuous backing, cylindrical with external baffle continuous backwashing, double-stage continuous backwashing without external baffle. Also, it describes the principle of the anti-blocking machine, the key technologies and the necessity of choosing double-stage pump in sewage source heat pump system with anti-blocking machine. The paper concludes the technical characteristics, the advantages and disadvantages of the double-stage sewage source heat pump system and introduces the selecting principle of the double-stage pump. The paper clarifies some misunderstanding about anti-blocking machine and double-stage pump.

3 kW Class Displacer Type Stirling Engine for Heat Pump System

1987 ◽  
Author(s):  
T. Nomaguchi ◽  
T. Suganami ◽  
M. Fujiwara ◽  
M. Sakai ◽  
T. Koda ◽  
...  
Keyword(s):  
Heat Pump ◽  
Stirling Engine ◽  
Pump System ◽  
Heat Pump System
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