scholarly journals Experimental analysis of the thermal comfort provided by an electrical heater and a heat pump

2021 ◽  
Vol 2116 (1) ◽  
pp. 012105
Author(s):  
J R García-Cascales ◽  
F Illán-Gómez ◽  
F J S Velasco ◽  
F Vera-García ◽  
A Dengra Vera ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Comfort ◽  
Heat Pump ◽  
Experimental Analysis ◽  
Climate Chamber ◽  
Test Matrix ◽  
Electrical Heater ◽  
Do So

Abstract After considering heating sector, one realises that there is no clear and consensual way to quantify or qualify the thermal comfort of the different technologies available to satisfy the heating demand of a home. This contribution tries to call attention to this by means of an experimental study of the thermal comfort provided by two very different technologies, an electrical heater and a heat pump. To do so, a test matrix is developed by considering [2]. Some experiments are carried out in a climate chamber constructed following [1]. The variables registered are used to determine the comfort variables defined in [3] for each technology. After both technologies are compared and some conclusions are drawn.

scholarly journals Building Retrofit and Energy Conservation/Efficiency Review: A Techno-Environ-Economic Assessment of Heat Pump System Retrofit in Housing Stock

2021 ◽  
Vol 13 (2) ◽  
pp. 983
Author(s):  
Mustapha Mukhtar ◽  
Bismark Ameyaw ◽  
Nasser Yimen ◽  
Quixin Zhang ◽  
Olusola Bamisile ◽  
...  
Keyword(s):  
Energy Conservation ◽  
Thermal Comfort ◽  
Heat Pump ◽  
Cooling System ◽  
Commercial Buildings ◽  
Optimization Techniques ◽  
Hot Water ◽  
Environmental Benefits ◽  
Pump System ◽  
Air Conditioners

The world has not been able to achieve minimum greenhouse gas emissions in buildings’ energy consumptions because the energy and emissions optimization techniques have not been fully utilized. Thermal comfort is one of the most important issues for both residential and commercial buildings. Out of the 40% of global energy consumed by buildings, a large fraction is used to maintain their thermal comfort. In this study, a comprehensive review of the recent advancements in building energy conservation and efficiency application is presented based on existing high-quality research papers. Additionally, the retrofit of the heating/cooling and hot water system for an entire community in Cyprus is presented. This study aims to analyze the technical and environmental benefits of replacing existing electric heaters for hot water with heat pump water heating systems and the use of heat pump air conditioners for thermal comfort in place of the existing ordinary air conditioners for space heating and cooling. One administrative building, 86 apartments (including residential and commercial) buildings, and a restaurant building is retrofitted, and the feasibility of the project is determined based on three economic indicators, namely; simple payback period (SPP), internal rate of return (IRR), and net present value (NPV). The electrical energy required by the hot water systems and the heating/cooling system is reduced by 263,564 kWh/yr and 144,825 kWh/yr, respectively. Additionally, the retrofit project will reduce Cyprus’ CO2 emission by 121,592.8 kg yearly. The SPP, IRR, and NPV for the project show that the retrofit is economically feasible.

Experimental Analysis of a Solar Energy Storage Heat Pump System

2021 ◽  
Author(s):  
Haifei Chen ◽  
Guiqiang Li ◽  
Yueyue Ling ◽  
Jie Fu ◽  
Yunjie Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Heat Pump ◽  
Experimental Analysis ◽  
Pump System ◽  
Heat Pump System ◽  
Solar Energy Storage

Deliberate Presleep Control of Dream Content: An Experimental Study

1977 ◽  
Vol 45 (2) ◽  
pp. 660-662 ◽  
Author(s):  
M. L. Griffin ◽  
D. Foulkes
Keyword(s):  
Experimental Study ◽  
Dream Content ◽  
Reliable Evidence ◽  
Better Than ◽  
Do So

29 subjects attempted, over a period of 10 nights, to influence their dreams using techniques described in Garfield's book, Creative Dreaming (1974). A target suggestion was selected from a list of six suggestions compiled by, or for, each subject. Subjects kept daily records during the experiment both of their efforts at dream influence and of the dreams they recalled. Four judges attempted to identify from the dream material the target suggestion on each subject's suggestion list. The results indicated that the judges were unable to do so at better than chance levels. Thus analysis indicated no reliable evidence that conscious presleep suggestions become incorporated into dream content.

Experimental study of a control strategy for a cascade air source heat pump water heater

2017 ◽  
Vol 110 ◽  
pp. 835-843 ◽  
Author(s):  
Minglu Qu ◽  
Yanan Fan ◽  
Jianbo Chen ◽  
Tianrui Li ◽  
Zhao Li ◽  
...  
Keyword(s):  
Experimental Study ◽  
Heat Pump ◽  
Control Strategy ◽  
Water Heater ◽  
Air Source Heat Pump ◽  
Heat Pump Water Heater

Experimental study of the influence of anticipated control on human thermal sensation and thermal comfort

Indoor Air ◽  
2013 ◽  
Vol 24 (2) ◽  
pp. 171-177 ◽  
Author(s):  
X. Zhou ◽  
Q. Ouyang ◽  
Y. Zhu ◽  
C. Feng ◽  
X. Zhang
Keyword(s):  
Experimental Study ◽  
Thermal Comfort ◽  
Thermal Sensation

Experimental Study of Electrical Discharge Grinding Honeycomb Tori

2012 ◽  
Vol 468-471 ◽  
pp. 924-927
Author(s):  
Ji Gao ◽  
Xiao Fang Ma ◽  
Qing Yang Liu
Keyword(s):  
Experimental Study ◽  
Experimental Analysis ◽  
Electrical Discharge ◽  
Electrical Parameters ◽  
Processing Efficiency ◽  
Technological Design ◽  
Machining Precision ◽  
Different Parts

Through the research of domestic and international aviation engine seal pieces, this paper have described the structure and technological design of electrical discharge grinding honeycomb torus. Based on experimental analysis of processing precision and processing efficiency under different electrical parameters, machining sections were designed according to the processing requirements of different parts. The results indicate that the machining precision and efficiency can be enhanced greatly.

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