A Central Air Conditioning System Design for Hotel in Guangzhou

2013 ◽  
Vol 860-863 ◽  
pp. 1612-1615
Author(s):  
Zhou Wu ◽  
Fang Yang ◽  
Hui Fang Tian ◽  
Jing Jing Wang
Keyword(s):  
Air Conditioning ◽  
Water System ◽  
Air Conditioning System ◽  
Conference Room ◽  
Guangzhou City ◽  
Air System ◽  
Central Air Conditioning ◽  
Smoke Prevention ◽  
Large Conference

The primary mission of this design is the air conditioning design of a hotel in Guangzhou city. The calculation of cooling load & heat load, division of the air conditioning system and the determination of the scheme, the design of the duct and water system, and the design of the smoke prevention and extraction system are all included. According to the related standard and considering the energy saving and comfort requirements, the air conditioning system are determined through the economic and technological comparison. Primary return air system is used for open office area and dining hall; fan-coil units with fresh air system is adopted for the guest rooms of the hotel; and the VRV system is adopted for the large conference room. The new air in restaurant rooms and the large conference room is handled by full-heat type fresh air exchanger; new air in guest room is handled by air conditioning units.

Air Conditioning System Water Quality and Equipment Condition Investigation and Analysis of Energy Saving Measures

2012 ◽  
Vol 516-517 ◽  
pp. 1224-1228
Author(s):  
Na Liang ◽  
Rui Li
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Water System ◽  
Building Energy ◽  
Development Trend ◽  
Air Conditioning System ◽  
Effective Utilization ◽  
Energy Saving Potential ◽  
Central Air Conditioning ◽  
Points Of View

Due to energy reserves reduces gradually and uneven distribution, all countries pay more and more attention to energy saving and improve the effective utilization of energy, China also attaches great important to this. Energy saving of buildings is a necessary development trend. Air conditioning system as a large important part of building energy consumption has a huge energy-saving potential. This article mainly introduced the related strategies of energy saving in central air conditioning water system from the following three points of view: the water treatment, the cooling tower, and the variable frequency pump.

Energy-Saving Monitoring System of Central Air-Conditioning Based on Dynamic Load

2014 ◽  
Vol 1039 ◽  
pp. 409-414
Author(s):  
Tao Han ◽  
Xue Feng Lai ◽  
Liang Wen Yan ◽  
Zai Feng Zhang
Keyword(s):  
Energy Saving ◽  
Monitoring System ◽  
Dynamic Load ◽  
Pid Control ◽  
Air Conditioning ◽  
Water System ◽  
Air Conditioning System ◽  
Advantages And Disadvantages ◽  
Hardware System ◽  
Central Air Conditioning

This paper introduces the components of central air-conditioning system and compares the advantages and disadvantages of the PID control and fuzzy control.Fuzzy control theory and inverter technology are combined to design the Energy-Saving Monitoring System based on the fuzzy control box of STM32F103C8T6,Siemens S7-200 PLC, ABB inverter as the hardware system and interfaces configuration of KingView as the software. Experimental results show that the water system can be variable flow controlled based on the dynamic load, central air-conditioning energy efficiency the COP has greatly improved under the premise of ensuring the comfort of central air-conditioning.

scholarly journals Utilizing the solar thermal ice storage system in improving the energy, exergy, economic and environmental assessment of conventional air conditioning system

2021 ◽  
Author(s):  
Mohamed Elhelw ◽  
Wael M. El-Maghlany ◽  
Mohamed Shawky Ismail ‎
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Storage System ◽  
Water System ◽  
Maximum Energy ◽  
Ice Storage ◽  
Air Conditioning System ◽  
Air System ◽  
Alexandria City ◽  
Air Conditioning Systems

Abstract This paper introduces novel modification for conventional air conditioning systems through utilizing a thermal ice storage system integrated with solar panels. Alexandria and Aswan, cities in Egypt, are chosen to represent two climates for hot-humid and hot-dry climates respectively. The governing equations for both heat and mass transfer are theoretically solved. Exergy analysis is performed for the proposed solar-ice thermal storage system via determining exergy destruction on ice and solar components as well as the total destruction based on transient analysis. This study was carried out on two common types of air conditioning systems, an air handling unit and fan coil unit. Results showed that, solar-ice storage system is more effective approach in hot-humid climate than hot-dry climate and more efficient with all-water air conditioning system than with all-air conditioning system. The maximum energy saving is 205.16 GJ having a percent of 27.5% in August for all water system in case of Alexandria city and 224.67 GJ with a percent of 25.38% in August for all-water system in case of Aswan city. All air system simulation showed maximum energy saving of 175.05 GJ with a percent of 18.13 % in case of August for Alexandria and 175.45 GJ having a percentage of 17.43% in case of Aswan in August. Moreover, the all-water system achieved a reduction in CO2 emissions by 467 tons/year in Aswan city and 390 tons/year in case of Alexandria city. While these reductions decrease to be 435 and 353 tons/year when the all-air system used for the same two cities.

Application of the Self-Adjusting Fuzzy Control in Water System of Central Air-Conditioner for Saving Energy

2014 ◽  
Vol 1070-1072 ◽  
pp. 2010-2016 ◽  
Author(s):  
Yuan Yuan Zhang ◽  
Yu Nong Shen
Keyword(s):  
Air Conditioning ◽  
Fuzzy Controller ◽  
Control Strategies ◽  
Water System ◽  
Response Speed ◽  
The Self ◽  
Air Conditioner ◽  
Air Conditioning System ◽  
Central Air Conditioning ◽  
Saving Effect

Central air conditioning system with multi variable, nonlinear, time-varying, large time-delay characteristics using the traditional control strategy is difficult to control and good energy saving effect. For these features of central air conditioning system, self-adjustment fuzzy controller is studied based on the fuzzy controller. The simulation can be seen, the self-adjustment fuzzy controller has a faster response speed and smaller steady-state error, while there is a certain adaptive capacity. Its control performance is superior to conventional control strategies and conventional fuzzy controller. Central air-conditioning system uses the parameter self-adjusting fuzzy controller strategy combined with inverter technology. According to load changes, central air conditioning water system can automatically real-timely control the pumps to ensure that the comfort of central air-conditioning provided a significant reduction in energy consumption.

Research on Multi-Point Spraying of Central Air-Conditioning System

2012 ◽  
Vol 503-504 ◽  
pp. 941-944 ◽  
Author(s):  
Su Qian Yan ◽  
Xi Wen Wang
Keyword(s):  
Air Conditioning ◽  
Wind Pressure ◽  
Water Pump ◽  
Air Conditioning System ◽  
Textile Mills ◽  
Air System ◽  
Central Air Conditioning ◽  
Actual Operation ◽  
Conditioning Room ◽  
Heat And Moisture

Multi-point spraying air-conditioning room is widely used in some textile mills due to the advantage of no spray pipe and high power water pump. This article take the textile air-conditioning rooms as an example, comparing with the design of supply air system and result of experiment tests, the characteristics of multi-point spraying of air-conditioning system in supply air and heat and moisture exchange efficiency during actual operation are obtained. Besides, comparing with the wind pressure chart of the design of supply air system and result of experiment tests, it comes to a conclusion that Multi-point spraying air-conditioning room should be improved according to their own situation in actual operation. It also proposes the feasibility of wind pressure chart for regulate of supply air system.

The Design of a Central Air Conditioning System for a Rebuilt Commercial Building

2011 ◽  
Vol 84-85 ◽  
pp. 743-746
Author(s):  
You Yuan Zhou
Keyword(s):  
Air Conditioning ◽  
Low Cost ◽  
Water System ◽  
Department Store ◽  
Commercial Building ◽  
Air Conditioning System ◽  
Operational Result ◽  
Central Air Conditioning ◽  
System Water ◽  
System Layout

An example of a central air-conditioning project of a rebuilt department store is described in this paper. The design of air system, water system, layout and operations for the air conditioning system is presented in this paper. The system is different form ordinary ones because the floor height is lower; so many special considerations must be taken during the design. In addition, the low cost and easy maintenance place an important role in the design. The operational result of the design is promising and it can be referenced by other designers.

Modeling and Simulation of Chilled Water System for Central Air Conditioning

2012 ◽  
Vol 204-208 ◽  
pp. 4280-4285 ◽  
Author(s):  
Jian Min Sun ◽  
Chun Dong Zhang ◽  
Ze Yang Zhou
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Pid Control ◽  
Air Conditioning ◽  
Water System ◽  
Air Conditioning System ◽  
Chilled Water ◽  
Central Air Conditioning ◽  
Chilled Water System ◽  
Saving Effect

Considering the central air conditioning system is highly susceptible to interferences from external environment, this paper established a dynamic mathematical model for chilled water system with the air conditioning area, fan coil unit and air conditioning area interference factors. Selection of chilled water system as a controlled object, designed the energy saving control system for central air-conditioning. The inputs of PID controller are deviation of actual temperature and setting temperature, and the change rate of the deviation; output is operation frequency of pump. Experiment shows that, PID control system in 90% time operating at a frequency of 10Hz-40Hz, average is 32.5Hz. Compared with no control system, the pump power consumption was reduced 33.9%.In conclusion, PID control in the central air conditioning system have a good energy saving effect.

A Central Air Conditioning System Design for Guesthouse in Changsha City

2012 ◽  
Vol 170-173 ◽  
pp. 2431-2436
Author(s):  
Yun Fan Zeng ◽  
Min Hui Zhang
Keyword(s):  
Air Conditioning ◽  
Ventilation System ◽  
Water System ◽  
Exhaust System ◽  
Air Conditioning System ◽  
Cold Source ◽  
Electric Boiler ◽  
Central Air Conditioning ◽  
Reliability Of Operation ◽  
Process Energy

This article presents the design of the air conditioning system in the building. In the project, ice storage for cold source and electric boiler thermal storage for heat source are taken while variable primary flow is used for water system. Taking into account the functions of each part, all air and fan coil unit with fresh air system are applied in ventilation system. The design of air exhaust system is introduced. A detail scheme about the annual operational regulation for energy saving is proposed. During the designing process, energy conservation is given enough attention, and the reliability of operation is also ensured.

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