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Air conditioning hot water one cooling and hot water mode control technology research

Author: JiangJiaLi
Tutor: JiangLeXin
School: Central South University
Course: Mechanical and Electronic Engineering
Keywords: Air conditioning hot water one machine Operating characteristics Control strategy PLC module
CLC: TB66
Type: Master's thesis
Year: 2010
Downloads: 85
Quote: 1
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Abstract


Paper developed air-conditioned hot water one machine is cooling, heating and hot water production as one of the energy-saving equipment , the device has five operating modes , cooling and hot water supply operation mode while in the refrigeration full recovery of condensation heat system of hot water , so that the device reflects a high degree of energy saving and environmental protection performance , the operation mode is the most energy-efficient equipment operation mode , is also the focus of this study content . Theoretically air conditioning hot integrally mechanism operational characteristics of cold and hot water supply mode , specific analysis of the influence of the condensation temperature and evaporation temperature of the cooling capacity, the cooling coefficient of performance , the unit energy consumption in this mode , as well as tank the impact of water temperature on the condensing temperature , provides a theoretical basis for the development of the mode control strategy . The equipment needed to switch between the water-cooled condenser and air-cooled condenser , cooling and hot water mode . Under different ambient temperatures and tank temperature , how to determine the optimal switching point is the focus of this thesis . Papers start with the standard conditions experimental study to identify the best switching point of the standard conditions , combined with fuzzy logic theory, fuzzy control model to determine the best conditions in other non-standard switching point . And fuzzy logic system with PLC control system is designed by combining an air-conditioned hot water machine fuzzy controller , compared with the conventional controller , significant energy saving effect . Analysis in the study of the operating characteristics of the equipment cooling and hot water supply mode , the impact of different factors on system performance , and to develop air - conditioned hot one machine in this mode control strategy for the device in the future optimal operation and reasonable control provides a theoretical basis , which provides an important basis for the rational design of equipment control system .

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CLC: > Industrial Technology > General industrial technology > Refrigeration Engineering > Refrigeration technology
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