| With the development of society and the improvement of the quality of human living,the prominent problem of building energy consumption is becoming more and more significant.As the thermal performance of buildings is relatively weak,the improvement of the performance of outdoor light-transmitting envelopes has become one of the key issues of building energy conservation.Translucent photovoltaic windows combine photovoltaic modules and ordinary white glass to meet the needs of building lighting and decoration,and they can also use solar energy to generate clean electricity,which has good active energy-saving advantages.However,due to the particularity of the photothermal performance of the photovoltaic external window,the impact on the indoor photothermal environment also has its own significant characteristics,which results in a different design and application from the traditional glass window,which still needs to be further studied.Therefore,this paper discusses the selectable evaluation indicators for the thermal environment,light environment and energy consumption level of photovoltaic external window buildings,and through the experimental test results of the experimental platform,qualitatively describes the environmental parameter change characteristics of photovoltaic external window rooms and ordinary window rooms.And it is concluded that the indoor environment of photovoltaic external window room and ordinary window room is a typical non-uniform and unstable thermal environment.On this basis,an adaptive thermal evaluation experiment on the effects of photo-thermal coupling in photovoltaic external windows and ordinary windows was carried out.The experimental data of the photo-thermal environment parameters of the two types of rooms were first passed,and the existing photovoltaic windows and ordinary windows were combined.Window visual comfort threshold and ordinary window physiological effect threshold,using sample mean variance analysis to verify the significance of the photo-thermal coupling effect,thus establishing an a PMV evaluation model based on the impact of photo-thermal coupling,and found that the physiology of photovoltaic exterior window buildings The lower threshold of the effect illuminance is 400 lx,which is different from the lower threshold of the physiological effect illuminance of ordinary glass buildings.After that,the improved TOPSIS method based on gray correlation was used to carry out multi-objective optimization analysis and optimization of the double-layer photovoltaic exterior window design schemes in Taiyuan and Chengdu regions,providing a practical application for the practical engineering of double-layer photovoltaic exterior windows.Technical ideas;In addition,through the Delphi expert survey method,the subjective weight values of the operating level indicators of the thermal environment,light environment and energy consumption level of photovoltaic exterior windows are determined.On the basis of analogy to the RCM theory in the field of power mechanical engineering,Established a comprehensive performance evaluation model based on the combined weighting method of photovoltaic exterior window buildings,and took the photovoltaic exterior window building of the experimental platform as an example to analyze the comprehensive performance value of the operation during the test period and the changes in various indicators,and A coupling control method based on index threshold and comprehensive performance threshold is proposed,which provides a feasible technical solution for the coordination and reasonable integration of operation between photovoltaic external windows and construction equipment.The research conclusions of this paper are as follows:(1)The indoor thermal environment of the photovoltaic external window room and the ordinary window room is a typical unstable and non-uniform environment.The fundamental reason is that the solar radiation causes the uneven distribution of the indoor thermal environment,and its daily change makes the indoor heat Changes in environmental parameters fluctuate greatly.The non-steady state is reflected in the temperature change range of the measured environment more than 1K for most of the time,and the temperature drift and slope rate also exceed 2K/h.The non-uniformity is reflected in the coefficient of variation between the average temperature of the inner surface of the inner envelope of the two rooms in the room,which also reflects a strong diurnal variation,and the coefficient of variation is the highest during the noon period;(2)The indoor working surface illuminance level of the photovoltaic external window room is generally lower than that of the ordinary window room.At the same time,the illuminance comfort threshold range and the significance threshold of the physiological effect of the two are also different.The former illuminance comfort threshold is 400lx-2000 lx,physiological The significance threshold of the effect is 400 lx,the latter’s illuminance comfort threshold is 450lx-2000 lx,and the physiological effect’s significance threshold is 500lx;and the influence of the light-heat coupling effect on the thermal sensation is statistically significant,based on different illuminances Divide the range,calculate the corresponding adaptive coefficients in each illuminance range,and establish the a PMV model of the two rooms based on the light-heat coupling effect;(3)Based on the evaluation indicators of the lighting environment dynamic evaluation index s UDI,building net energy consumption and building energy efficiency rate proposed by the existing research results,according to the sorting method that approximates the ideal solution,the gray relational analysis method,and the entropy method Integrating the advantages of several commonly used evaluation methods,an improved TOPSIS double-layer photovoltaic exterior window building daylighting and energy consumption evaluation model based on gray correlation is established;the establishment of this evaluation model provides a new way for the optimization of photovoltaic exterior window building design schemes.Feasible way.The evaluation model has high engineering applicability.It can be applied in practice according to the actual situation of the project and combined with the simulation of related software,and the relative advantages and disadvantages of each scheme can be compared;(4)In this paper,experts consulted and investigated the weight of thermal environment,light environment,and energy consumption level of photovoltaic exterior window buildings,and obtained subjective weight values related to the above three aspects and performed a significant test on them.After that,the establishment of the comprehensive performance evaluation model of photovoltaic windows based on the combined weighting method is established,and it is verified that the predicted comprehensive performance value of the model based on a PMV evaluation index is in good agreement with the actual calculated comprehensive performance value of the state.Combining the daily operating characteristics of each performance index value of the photovoltaic exterior window building during free operation and the established comprehensive performance value calculation mechanism of the predicted state,the control logic and feasible operating mode for the comprehensive regulation of the photovoltaic exterior window building operating dynamics are proposed.This control method can ensure that the goal of coordination and reasonable integration of the operation between the photovoltaic external window and the building equipment can be achieved.The research results of this paper can provide theoretical support for the evaluation of the indoor thermal environment and light environment of double-layer translucent photovoltaic exterior windows in my country,as well as the optimization of existing photovoltaic exterior window design schemes and the coordination of operation between photovoltaic exterior windows and construction equipment Integrate reasonably and provide technical basis and theoretical support. |
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