scholarly journals GROUND OF RATIONAL TECHNOLOGY OF UTILIZATION OF WARMTH OF THE SYSTEM OF CONDITIONING FOR THE HOT WATERSUPPLY

2019 ◽  
Vol 27 (4) ◽  
pp. 35-41
Author(s):  
Gennady Sergeevich Olishevskyi ◽  
Ilya Gennadevich Olishevskyi
Keyword(s):  
Water Supply ◽  
Air Conditioning ◽  
Heat Recovery ◽  
Warm Period ◽  
Hot Water ◽  
Condensation Temperature ◽  
Efficient Technology ◽  
Heat Accumulator ◽  
Air Conditioning System ◽  
Rational Technology

Rational technology of effective application of thermal accumulator in the system of conditioning andhot water-supply of building in a warm period of year is analytically analyzed and grounded. Analyzed thepossibility of applying such an unconventional method as daily accumulation of thermal energy of the building'sair-conditioning system during the warm period with its subsequent use in the hot water system. Two technologiesfor heat recovery of the air conditioning system for hot water supply of a building using a heat accumulator wereinvestigated: with a constant volume of heat accumulator and variable condensing temperature of the refrigerantof the air conditioning system depending on the outside air temperature and heat recovery technology with avariable volume of heat accumulator and constant temperature condensation temperature of the refrigerantsystem conditioning. The research results showed the most efficient technology for utilization of heat from an airconditioning system with a variable volume of a heat accumulator, which is 35% more cost effective than atechnology with a constant heat accumulator cost of reference fuel. The possibility of real application of thesetechnologies, both in individual houses and apartments, was also grounded. Using the developed automatedmethod, it was certain that application of thermal accumulator in the complex system of conditioning and hotwater-supply in a warm period would allow assured to provide by hot water of users due to the system ofconditioning and will economize from 74% to 82 % conditional fuel as compared to a chart with a caldron andconditioner without a thermal accumulator.

scholarly journals Automated method of calculation of parameters for non-traditional heating technologies and conditioning of buildings

2021 ◽  
pp. 40-47
Author(s):  
Illia Olishevskyi ◽  
Hennadiy Olishevskyi
Keyword(s):  
Water Supply ◽  
Heat Pump ◽  
Air Temperature ◽  
Air Conditioning ◽  
Warm Period ◽  
Hot Water ◽  
Heat Accumulator ◽  
Automated Method ◽  
Hot Water Supply ◽  
Conventional Fuel

Purpose. Develop an automated method for calculating parameters for heat pump systems for heating, air conditioning and hot water supply, designed for use in domestic conditions with non-standard heat transfer flows. Methodology. Mathematical modeling of thermodynamic processes occurring in heating, air conditioning and hot water supply systems. Findings. The automated method of calculating the parameters of non-traditional technology, which uses standard heat pump equipment of the water heating system for the cooling mode of the air in the warm period of the year, and the discharge of heat dissipated into the ground, was substantiated and developed; and for the needs of hot water supply heat pump air-liquid, acting as a high-speed water heater. The estimation of technologies of the thermal energy utilization in buildings developed earlier by authors is executed. The first technology involved the use of a heat pump and heat accumulator scheme in the cold season, and halved the consumption of conventional fuel compared to a gas column for hot water at the same facility. The second technology involved heat recovery with the help of a heat accumulator in a complex system of air conditioning and hot water supply in the warm period, which saves from 74 to 82% of conventional fuel compared to the scheme with boiler and air conditioner without heat accumulator. Critical conclusions were drawn about the need to use additional dimensional equipment for these technologies and the excess amount of hot water received. Possibilities of realization of such scheme were analyzed. Analytically substantiated recommendations on the design (ribbing of heat exchange surfaces) of heating devices and parameters of their operating modes in the cold and warm periods of the year were given. The condition of invariance of heat exchange areas of heating devices and basic water consumption in the heating system was fulfilled. The need to regulate the air conditioning regime by changing the water flow in the system to maintain a constant indoor air temperature with fluctuations in outdoor air temperature was substantiated. Originality.  For the first time, attention is paid to the study of non-traditional methods of using heat pump heating for heating, air conditioning and hot water supply of residential premises. The automated method for determining rational parameters for these technologies was developed. Practical value. The automated method of forming the control dependence of the mass flow of water in the system on the outside air temperature on the condition of constancy of the set comfortable indoor air temperature was developed. The use of air-liquid heat pump for hot water supply in the warm period was analyzed, a high energy conversion factor was noted (14 ... 22). The savings of conventional fuel from the application of the considered technology from 13% to 18% in comparison with the technology using a heat accumulator were substantiated.

The Analysis on Energy-Saving Reconstruction on Condensing Heat Recovery System of Air-Conditioning System

2017 ◽  
Vol 865 ◽  
pp. 212-216
Author(s):  
Xiang Dong Wu ◽  
Ze Hua Liu
Keyword(s):  
Water Temperature ◽  
Energy Saving ◽  
Air Conditioning ◽  
Heat Recovery ◽  
Optimization Design ◽  
Hot Water ◽  
Air Conditioning System ◽  
Recovery System ◽  
Heat Recovery System ◽  
In Series

Combining with the energy consumption of air-conditioning system and the characteristics of the cooling and heating load in the hotel, the authors analyse the energy-saving property and necessity of adopting condensing heat recovery from water chillers. Taking the air-conditioning system of a star-hotel as an example, the optimization design for condensing heat recovery system from chillers on raising the temperature difference between supply and return water, the hot-water tanks in series and the water temperature stratification effectively realizes cascade and sequential utilization of hot-water, which keeps the water temperature stable and becomes more energy-saving.

Solar Air-Conditioning System Using Single-Double Effect Combined Absorption Chiller

2013 ◽  
Vol 388 ◽  
pp. 133-138
Author(s):  
Hajime Yabase ◽  
Akira Hirai
Keyword(s):  
Air Conditioning ◽  
Heat Recovery ◽  
Double Effect ◽  
Hot Water ◽  
Gas Absorption ◽  
Load Factor ◽  
Absorption Chiller ◽  
Fuel Gas ◽  
Air Conditioning System ◽  
Solar Heat

We developed a single-double effect combined absorption chiller for "Solar air-conditioning system" . This chiller is composed of a highly-efficient gas absorption chiller as a main machine which are equipped with a solar heat recovery unit comprising a heat recovery heat exchanger and special condenser. It enables low temp. solar hot water at 75°C under operation at the cooling rating of load factor: 100%. And we constructed the demonstration plant in Japan. We confirmed that the solar heat priority usage function and gas-based backup function operate properly and overall system functions normally. In summer, fuel gas reduction by 10% could be achieved and the results as estimated were obtained.

Analysis of Heat Pipe Heat Exchanger (HPHE) For Waste Heat Recovery from an Air Conditioning System

2007 ◽  
Vol 2 (3) ◽  
pp. 86-95
Author(s):  
R. Sudhakaran ◽  
◽  
V. Sella Durai ◽  
T. Kannan ◽  
P.S. Sivasakthievel ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Heat Pipe ◽  
Air Conditioning ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Air Conditioning System ◽  
Pipe Heat

Joint Application of Solar Water Heating System and Air-Conditioning System in a Dormitory Building

2010 ◽  
Vol 171-172 ◽  
pp. 215-218
Author(s):  
Hai Ying Wang ◽  
Song Tao Hu ◽  
Jia Ping Liu
Keyword(s):  
Air Conditioning ◽  
Heating System ◽  
Hot Water ◽  
Water Tank ◽  
Auxiliary Heating ◽  
Water Heating ◽  
Air Conditioning System ◽  
Solar Water Heating ◽  
Solar Water ◽  
Solar Water Heating System

Solar water heating system is used to supply hot water all-year-round for a new dormitory building. Flat solar energy collectors are mounted on the roof. The hot water tank and pumps are installed together with the air conditioning equipments in the plant room. Air cooled heat pump is used to provide cooling in summer, and high temperature water from boiler room (in old building) is used as heat source in winter. Usually auxiliary heating is necessary to improve the stability and reliability of solar water heating system. In this case, we take full use of the equipment of air conditioning system instead of electricity as auxiliary heating resources. In this paper, we introduced the design of the solar water heating system and the auxiliary heating method by air conditioning systems. The control strategies to fulfill all the functions and switch between different conditions are also introduced.

The Analysis of Heat Recovery Efficiency and Influencing Factors in Air System

2012 ◽  
Vol 516-517 ◽  
pp. 1257-1261
Author(s):  
Chuang Wang ◽  
Rui Li
Keyword(s):  
Energy Conservation ◽  
Influencing Factors ◽  
Air Conditioning ◽  
Heat Recovery ◽  
Influence Factors ◽  
Design Parameters ◽  
Recovery Efficiency ◽  
Saving Energy ◽  
Air Conditioning System ◽  
Air System

It is one of the ways that realize the energy conservation of the building to use effectively extracting air heat recovery devices. In this paper, influence factors and heat recovery efficiency in air-conditioning system were analyzed, and design parameters of heat recovery devices were discussed with the view of saving energy.

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