Research on Environmental Friendly and Energy Saving Hot Water/Split Air-Conditioner Combination

2011 ◽  
Author(s):  
Fen Li ◽  
Jianbo Chen ◽  
Dan Chen
Keyword(s):  
Energy Saving ◽  
Hot Water ◽  
Air Conditioner ◽  
Environmental Friendly

The Experimental Study of Thermodynamic Performance on R407C Air-Conditioner Hot Water Combined Unit

2011 ◽  
Vol 467-469 ◽  
pp. 549-553
Author(s):  
Hong Song Hu ◽  
Fang Wang ◽  
Jian Zhong Yu ◽  
Wu Hao
Keyword(s):  
Heat Pump ◽  
Paper Analysis ◽  
Hot Water ◽  
Air Conditioner ◽  
Water Heater ◽  
Operation Conditions ◽  
Air Source Heat Pump ◽  
Heat Pump Water Heater ◽  
Environmental Friendly ◽  
Thermodynamic Performance

This paper analysis on the design and the test of an air-conditioner hot water combined unit using environmental friendly refrigerant R407C. Firstly the research status of the system is elaborated for air-source heat pump water heater simply. Then the principle and structure are described on an air-conditioner heat pump followed by a water heater at different running modes and different operation conditions. The hot water experiments of the unit in three seasons have been tested and researched in a multi-functional environmental chamber. Some analysis of the unit’s thermodynamic performance is carried out from the test data for improving such kind of machine afterward.

scholarly journals Development of “4E” Levelriver-Sea-Going Ship

2018 ◽  
Vol 25 (s3) ◽  
pp. 84-90
Author(s):  
Zhiyong Pei ◽  
Qingning Yuan ◽  
Weiguo Wu
Keyword(s):  
Energy Saving ◽  
Hydrodynamic Performance ◽  
Structural Safety ◽  
Loading Capacity ◽  
National Strategy ◽  
Environmental Friendly ◽  
Flat Type ◽  
Key Technologies ◽  
Energy Saving Technology ◽  
Green Ship

Abstract In order to effectively promote the construction of the Yangtze River economic belt, it has become China’s national strategy to vigorously develop the river-sea-going transportation. In the present paper, theoretical analysis, numerical simulation and model test are combined together to develop flat-type river-sea-going ship which is characterized with larger loading capacity, lower fuel consumption, better performance on energy-saving and environmental-friendly, excellent economy and higher transportation efficiency. Key technologies on hydrodynamic performance, structural safety, energy-saving technology and green ship technology are investigated to develop the river-sea-going ship. The developed “4E” level ship has great significance to the implementation of national strategic deployment.

scholarly journals Energy auditing and energy saving measures in 'Zastava Automobili' factory

2009 ◽  
Vol 13 (1) ◽  
pp. 185-193 ◽  
Author(s):  
Dusan Gordic ◽  
Milun Babic ◽  
Dubravka Jelic ◽  
Davor Koncalovic ◽  
Nebojsa Jovicic ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Feasibility Studies ◽  
Hot Water ◽  
Compressed Air ◽  
Energy Sources ◽  
Energy Costs ◽  
Energy Audit ◽  
Energy Auditing ◽  
Economical Feasibility

This paper deals with energy audit procedure implemented on only Serbian car manufacturer 'Zastava Automobili'. Based on the results of energy auditing and performed technological and economical feasibility studies several energy saving measures were proposed. The measures are related to different energy sources: steam, hot water, compressed air, electricity, and water. Such energy efficiency programs reduce energy costs and increase production profitability of the factory.

scholarly journals SOLAR RADIATION PROTECTION SYSTEM WITH SIMULTANEOUS HOT WATER SUPPLY

2020 ◽  
Author(s):  
І. Puhoviy ◽  
М. Makhrov
Keyword(s):  
Solar Energy ◽  
Energy Savings ◽  
Electrical Power ◽  
Warm Season ◽  
Hot Water ◽  
Air Conditioner ◽  
Domestic Water ◽  
Environmental Friendliness ◽  
Additional Advantage ◽  
The Cost

Problems. Windows in the summer let through a large amount of solar energy into the room, which causes an additional cost of cooling the air by conditioning. It is known that the limit of comfort is the temperature of 26 oC. To reduce the temperature, use air conditioners, which are required 0,3...0,5 kW of electrical power for 10 m2 of housing. The study deals with the capture of solar energy by water and its use for domestic water purposes (DHW). The goal of the research. Experimental verification of patented developments and calculations of hot water quantity obtained per day, energy savings and economic indicators. Methods of implementation. Experiments were conducted on the south window of the room, with water pumping by a pump and periodic measurement of air and water temperatures at the outlet of the system by mercury thermometer. The calculations were performed using the methods developed by the authors. The studies were conducted within three days of November. The temperature inside ranged a room from 19 to 23 °C. The system was operated in circulating mode on a water battery tank located below the absorber. Isolation of the absorber from the side of the room was made of a transparent food film. Research results. Water temperature reached 45 °C per 1,5-2 hours. Water consumption is enhanced by the thermosiphon effect when water moves from the bottom up. On a clear day of spring and autumn, you can heat for 50-70 % more water than the average for the average day of months of the warm season. For preparing DHW with 1 m2 of absorber, it is possible to get 45-50 kW∙h of heat for each month from March to September, taking into account cloudiness. The savings from the use of hot water and from reducing the consumption of electricity in the air conditioner are calculated. Conclusions. The payback period of the system, taking into account the cost of the heat for DHW and electricity savings for an electric air conditioner, is approximately 4-5 years. The cost of the system is close to the cost of a home air conditioner, for a premise with a single window oriented south. To the energy-saving factor, an additional advantage is the environmental friendliness of the system compared to the air conditioner.

scholarly journals Lessons learned from recommissioning a public office building

2018 ◽  
Vol 175 ◽  
pp. 04029
Author(s):  
Yuyang Miao ◽  
Chenggang Liu ◽  
Xinjiang Huang
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Water System ◽  
Lessons Learned ◽  
Hot Water ◽  
Office Building ◽  
Hvac System ◽  
Public Office ◽  
Control Scheme ◽  
Actual Energy Consumption

Energy consumption of HVAC system play a big role on the whole building energy usage. Recommissioning on HVAC system can improve build comfort and its performance. Taking the recommissioning of public office as an example, the issue of the energy consumption of HVAC system was found, control scheme of chilled and hot water system and AHUs was optimized, the new energy saving control scheme was determined, and the actual energy consumption was analysed. The result show that recommissioning for the public office building achieved obviously effect, and the rate of energy saving is 18%, 33% and 10% for chilled water, hot water and electricity, respectively.

scholarly journals A Study on the Performance of a Cascade Heat Pump for Generating Hot Water

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4313 ◽  
Author(s):  
Boahen ◽  
Choi
Keyword(s):  
Heat Exchanger ◽  
Energy Saving ◽  
Heat Pump ◽  
Heat Pumps ◽  
Hot Water ◽  
Research Interest ◽  
Coefficient Of Performance ◽  
Energy Saving Potential ◽  
Heating Capacity

The use of cascade heat pumps for hot water generation has gained much attention in recent times. The big question that has attracted much research interest is how to enhance the performance and energy saving potential of these cascade heat pumps. This study therefore proposed a new cycle to enhance performance of the cascade heat pump by adopting an auxiliary heat exchanger (AHX) in desuperheater, heater and parallel positions at the low stage (LS) side. The new cascade cycle with AHX in desuperheater position was found to have better performance than that with AHX at heater and parallel positions. Compared to the conventional cycle, heating capacity and coefficient of performance (COP) of the new cascade cycle with AHX in desuperheater position increased up to 7.4% and 14.9% respectively.

scholarly journals Energy Saving and GHG Emission Reduction in a Micro-CCHP System by Use of Solar Energy

2012 ◽  
Vol 10 (1) ◽  
pp. 16-20 ◽  
Author(s):  
Ion V. Ion ◽  
Gheorghe Ciocea ◽  
Florin Popescu
Keyword(s):  
Solar Energy ◽  
Energy Saving ◽  
Cost Reduction ◽  
Greenhouse Gas Emission ◽  
Hot Water ◽  
Solar Collectors ◽  
Ghg Emission ◽  
Photovoltaic Panels ◽  
Heat Demand ◽  
Heating Boiler

Abstract In this work, the reduction of greenhouse gas emission, and the energy saving by integrating solar collectors and photovoltaic panels in a Stirling engine based microcombined cooling, heating and power (mCCHP) system are studied. The mCCHP system consists of a natural gas Stirling CHP and an adsorber chiller. When the thermal outputs of the Stirling CHP and solar collectors are not sufficient to cover the heat demand for domestic hot water (DHW), heating/cooling, an auxiliary heating boiler starts to operate. The energy saving by using solar energy varies from 13.35% in December to 59.62% in April, in the case of solar collectors usage and from 7.47% in December to 28.27% in July, in the case of photovoltaic panels usage. By using solar energy the annual GHG emission decreases by 31.98% and the fuel cost reduction varies from 12.73% in December to 49.78% in June.

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