Comparison and Selection of HVAC Schemes for Weihai Baidu City

2011 ◽  
Vol 374-377 ◽  
pp. 681-684
Author(s):  
Yan Peng Wu ◽  
Hai Shan Xia
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Heat Pump ◽  
Air Conditioning ◽  
Second Phase ◽  
Air Conditioning System ◽  
Air Source Heat Pump ◽  
Pipe Networks ◽  
Time Part ◽  
Selection Of

The second phase of Weihai Baidu City project plans to become a three-star certificated program which is labled by China’s enviromental building evaluation. Heating and ventilated air conditioning program is one of the most important aspects in evaluation of energy saving. Feasibility study on GSHP, GWHP, air-source heat pump, seawater source heat pump were carried out, it’s confirmed that the most energy-saving and reliable way is that using municipal pipe networks for heating in winter and using split air conditioning or multi-connected air-conditioning system in summer. Summer air-conditioning adopts the new idea “part of time, part of space", representative the latest concept of energy efficiency in buildings in China.

scholarly journals Modeling and Simulation of Heat Pump Air-Conditioning System using Ecofriendly Refrigerants

2021 ◽  
Vol 9 (VI) ◽  
pp. 1166-1170
Author(s):  
Ajay Landage
Keyword(s):  
Energy Efficiency ◽  
Comparative Analysis ◽  
Physical Properties ◽  
Heat Pump ◽  
Air Conditioning ◽  
Coefficient Of Performance ◽  
Simulation Approach ◽  
Alternative Refrigerants ◽  
Air Conditioning System ◽  
Selection Of

A simulation approach to heat pump systems is proposed in this paper. The evaluation of working fluids is conducted. Moreover, the selected refrigerants are used in the simulation. Subsequently, the system is analyzed in terms of the coefficient of performance (COP) and energy efficiency. Some alternative refrigerants, instead of R22 used R290 refrigerent. It is described the selection of refrigerants adapted to each utilization, based on the thermodynamic and -physical properties, the technological behaviour, costs and use constraints as principal aspects of the environmental protection. Also, it is performed a comparative analysis in function of the total equivalent warming impact (TEWI) for some possible substitutes of refrigerant R22 used in various refrigeration and heat pump systems.

Calculation on Energy Saving Potential of a New Dry-Type Air-Conditioning System

2013 ◽  
Vol 756-759 ◽  
pp. 4388-4393
Author(s):  
Xiao Wei Hu ◽  
Yu Feng Zhang ◽  
Li Li Wei ◽  
Xin Hui Wu
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Heat Pump ◽  
Air Conditioning ◽  
Type System ◽  
Operating Conditions ◽  
Combined System ◽  
Air Conditioning System ◽  
Efficiency Comparison ◽  
Conventional Cooling

Temperature and humidity independent control can be made by a new dry-type air-conditioning system, the combination of silica gel rotor and heat pump. Heat pump cycle can simultaneously cool the process air and heat the regeneration air, so it can cancel each other out in the cold and heat energy consumption within the system. This novel form of system not only solves the regeneration energy issues fundamentally but also avoids energy waste by reheating in conventional cooling dehumidification air-conditioning system. Based on the establishment of the component model, MATLAB program has been compiled to simulate the combined system running at nominal operating conditions and calculate the performance parameters and energy efficiency. Comparison of the energy efficiency was made of this dry-type air-conditioning system with ones of other regeneration desiccant wheel air conditioning system and conventional cooling dehumidification air-conditioning system, the results of which show that the new dry-type system provided regeneration energy, overcomes the restriction from climate, region and using conditions of other regeneration. Moreover, compared with conventional re-heat air-conditioning system, its energy saving is up to 35.1% and the energy efficiency is increased by 38.1%.

Energy-Saving Analysis and Heat Transfer Performance of Wastewater Source Heat Pump

2014 ◽  
Vol 694 ◽  
pp. 211-217 ◽  
Author(s):  
Ya Xiu Gu ◽  
Tian Wang ◽  
Wei Liu ◽  
Feng Feng Ma
Keyword(s):  
Heat Transfer ◽  
Energy Saving ◽  
Heat Pump ◽  
Air Conditioning ◽  
Wire Mesh ◽  
Low Grade ◽  
Falling Film ◽  
Urban Wastewater ◽  
Air Conditioning System ◽  
Evaporation And Condensation

There is a large potential in the heat loss from the urban wastewater. In all kinds of low-grade heat sources, urban wastewater is gradually widely used because of its advantages such as huge quantities, small variation of temperature, warm in winter and cool in summer, etc. By integrating a heat pump to utilize this heat, the wastewater source heat pump (WWSHP), which is a new water reuse and treatment strategy to tackle the water problems of China and to realize the sustainable development, recovers the heat of wastewater. The WWSHP air conditioning system as residential application can reduce the need of energy systems based on fossil fuel for cooling, heating, and hot water's supply purposes. The system's working principle, classification and the wastewater's characteristic parameters were discussed in this paper. And the scheme of using WWSHP system for central air-conditioning compared with other refrigerating and heating equipments was analyzed in detail. The investigation into COP (Coefficient of Performance) and PER (Primary Energy Ratio) was shown in this paper. Among the four kinds of common air conditioning units, when the loads are same respectively, the WWSHP has the most significant energy-saving effect. Furthermore, mechanism of heat transfer enhancement for falling-film evaporation and condensation surface of tubes packed with wire-mesh is also studied in detail. Theoretical simulation will be carried out for the heat transfer process and the flow of falling-film outside horizontal tubes. Improvement of controlling parameters influenced the evaporation and condensation performance, and then led to an increase in the refrigerating quantity and the COP. Consequently, this WWSHP system has its theoretical significance and promising engineering application potentials for the residential refrigerating and air-conditioning system using low-temperature waste heat source.

Multiple Criteria Decision Method Used in Selection of Green Air-Conditioning System

2013 ◽  
Vol 732-733 ◽  
pp. 605-608
Author(s):  
Can Zhou ◽  
Yu Yun Li
Keyword(s):  
Heat Pump ◽  
Air Conditioning ◽  
Indoor Environment ◽  
Operating Costs ◽  
Structure Model ◽  
Air Conditioning System ◽  
Ground Source ◽  
Air Conditioning Systems ◽  
Operation And Management ◽  
Selection Of

Established a hierarchy structure model and made a quantitative assessment of seven air-conditioning systems which are gas boiler plus electric refrigerating system、air-cooled heat pump、variable refrigerant volume air conditioning、ground-source heat pump air conditioning、centralized heat-supply plus electric refrigerating、gas direct-fired machine、energy storage on relevant professionality and indoor environment,initial investment,operating costs,operation and management,environmental impact,energy consumption.Finally we obtained an optimal scheme,which agreed with that in practice.

Analysis on Energy Saving Factors and Research on Energy Efficiency Evaluation Indexes of Ventilation and Air Conditioning System in the Underground Engineering

2013 ◽  
Vol 291-294 ◽  
pp. 682-687
Author(s):  
Shi Bin Geng ◽  
Sha Sha Chen ◽  
Ming Xing Xiao
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Air Conditioning ◽  
Water System ◽  
Efficiency Evaluation ◽  
Underground Engineering ◽  
Air Conditioning System ◽  
Evaluation Indexes ◽  
Heat System ◽  
Energy Efficiency Evaluation

This paper makes comprehensive analysis on energy saving factors of ventilation and air conditioning system in the underground engineering mainly from five aspects ,such as the overall scheme, cold - heat system, air system, water system and operation management . And based on this, furthermore, each energy saving factor is quantified , the energy efficiency evaluation indexes of each subsystem is studied .So that it provides a concrete and feasible evaluation index and its basic calculation method for energy-saving evaluation, diagnosis of energy saving and energy saving reconstruction work.

Field Test and Economic Analysis of Energy-Saving Renovation for an Old Nursery Pig Building in Beijing, China

2020 ◽  
Vol 36 (5) ◽  
pp. 619-628
Author(s):  
Wanying Zhao ◽  
Meizhi Wang ◽  
Hao Li ◽  
Guoming Li ◽  
Zhengxiang Shi
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Heat Pump ◽  
Mathematical Theory ◽  
Ground Source Heat Pump ◽  
Coal Consumption ◽  
Heating Systems ◽  
Air Source Heat Pump ◽  
Ground Source ◽  
Nursery Pig

HighlightsAn old nursery pig building was retrofitted to potentially improve envelope insulation capacity.A mathematical theory based on coal consumption was established to evaluate energy efficiency of insulation renovation for a nursery pig building.The heat loss of the nursery pig house with 90-mm-thick extruded polystyrene boards was 60% lower than that without the materials.Ground source heat pump and air source heat pump are economical and environmental-friendly heating systems.Abstract. Appropriate renovation of old buildings is critical for energy-efficient pig production. Currently, energy consumption, especially coal consumption, keeps on rising in the production. Therefore, it is essential to develop energy-saving renovation methods for old nursery pig buildings and use cleaner heating energies. A mathematical theory based on coal consumption was established to evaluate energy efficiency of insulation renovation. Two nursery pig houses were tested in this experiment. One was the retrofitted house with the 90-mm-thick extruded polystyrene boards embedded onto outer walls, and the other one was served as a control house without those insulation materials. The results show that the air temperature and inside surface temperature of the retrofitted house were significantly higher than those of the control house in winter. Therefore, though adding insulation layers to walls, the envelope insulation capacity was improved. Meanwhile, the heat loss of the retrofitted house was 60% lower than that of the control house (11.08 W m-2 vs. 27.93 W m-2), when the theoretical ventilation rate was 1560 m3 h-1. In addition, with the prohibition of the coal usage in forseeable future of China, the ground source heat pump and air source heat pump can be economical solutions for heating systems with clean and renewable energy. Keywords: Air source heat pump, Extruded polystyrene board, Ground source heat pump, Heating, Thermal insulation.

scholarly journals POSSIBILITIES FOR GROUND WATER USE FOR CONDITIONING OF THE FACULTY OF TECHNICS AND TECHNOLOGIES BUILDING IN YAMBOL

2018 ◽  
Vol 16 (2) ◽  
pp. 166-169
Author(s):  
Ivan Binev
Keyword(s):  
Energy Efficiency ◽  
Water Supply ◽  
Ground Water ◽  
Energy Saving ◽  
Heat Pump ◽  
Water Use ◽  
Pump System ◽  
Heat Pump System ◽  
Heat Demand ◽  
Selection Of

The purpose of the report is to analyze the possibilities for using heating energy for the building of the Faculty of Technics and Technology of Yambol at Trakia University of Stara Zagora, Bulgaria, provided by renewable sources. The selection of the water-water heat pump system is made after determining the heat demand for the building when applying the energy saving measures proposed in the energy efficiency audit. The possibilities for using groundwater for water supply were studied to heat the building.

Discussion to Energy-Saving Design of the Air-Conditioning System

2013 ◽  
Vol 361-363 ◽  
pp. 444-447
Author(s):  
Qian Wang ◽  
Rui Li
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Saving ◽  
Distribution System ◽  
Air Conditioning ◽  
Building Energy ◽  
Design Parameters ◽  
Building Energy Efficiency ◽  
Air Conditioning System ◽  
Transmission And Distribution

Air conditioning energy saving is of great significance for building energy efficiency, reduce air conditioning energy consumption can reduce most of the building energy consumption, achieve the purpose of saving energy. This article analyzed and discussed the choice of indoor design parameters, the choice of cold and heat source and the design of the transmission and distribution system.

Some Villas Solar Heating and Air Conditioning System Design of Double-Source Heat Pump Programmer

2012 ◽  
Vol 512-515 ◽  
pp. 168-171
Author(s):  
Wei Yu ◽  
Feng Chen ◽  
Hong Bo Li
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Air Conditioning ◽  
Heating System ◽  
Time Sharing ◽  
Geothermal Heat ◽  
Air Conditioning System ◽  
Geothermal Heat Pump ◽  
Air Conditioning Systems ◽  
Building Heat

This article on a villas in Langfang city, Hebei province, heating and air conditioning systems. According to the owners of the double requirement of energy saving and environmental protection to owners selection of solar energy and geothermal heat pump heating system combined. To better achieve heating and air conditioning energy saving operation of villas, the system can be run by optimizing the control scheme, time-sharing partition building heat adjustment.

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