Research On Light And Heat Environment And Energy Saving Optimization Of Cruise Air Conditioning Cabin

More and more people choose to travel by cruise ship with the development of ship technology and the beautiful routes.The comfortable living environment and modern entertainment facilities of cruise ships have attracted many passengers to experience.However,due to its own characteristics,the cruise ships have high requirements for safety,comfort and energy saving.At present,the research on cruise comfort mostly focuses on thermal comfort.For cruise ship,its light comfort is also important,and the change of cabin light and heat environment will also affect the energy consumption of cabin air conditioning.Therefore,exploring the light and heat environment of the cabin has important guiding significance and practical value for improving the light and heat comfort of the cabin and optimizing the energy consumption of cabin air conditioning.Taking the typical cabin of cruise ship as the research object.Firstly,the evaluation indexes of thermal comfort and light comfort are analyzed through theoretical research.Based on the above indexes,the numerical simulation model is verified by experiments using the actual sample cabin.Secondly,taking the actual cruise route as an example,the dynamic heat load on the route is analyzed by CTF method.Based on the analysis of heat load,a marine VAV air conditioning system is established,and the light and heat environment and energy consumption of the cabin under different window types,window wall ratio and whether there is sunshade are analyzed by using Energy Plus.Finally,many factors affecting the light thermal environment and energy consumption of the cabin are selected,and the influence degree of different parameters on the light thermal environment and energy consumption is analyzed by Morris sensitivity analysis method.The main conclusions are as follows:(1)At the same time on the route,the illumination and glare index of double-layer window are less than that of single-layer window;In terms of thermal comfort,there is almost no difference in PMV between the two routes in summer,while in winter,the double window PMV is more comfortable;The energy consumption of double-layer windows is better than that of single-layer windows in terms of air conditioning energy consumption,especially when there is no solar radiation on the route in winter,the energy consumption of double-layer windows is much lower than that of single-layer windows.(2)When there is solar radiation,the illuminance,mean radiation temperature,PMV and cabin air conditioning energy consumption increase with the increase of WWR,but the glare index decreases slightly with the WWR increase.The change of cabin energy consumption is similar to that of window type.When there is no solar radiation,the larger the window wall ratio,the higher the energy consumption of air conditioning.(3)Whether there is sunshade or not has a great impact on the light comfort of the cabin.Within 30 °,the bland sunshade decreased the glare index by half,which is below the maximum allowable glare value.The peak value of the mean temperature and mean radiation temperature of the cabin on the route also decreases significantly when there is sunshade,making the temperature closer to the design value;When there is solar radiation,shading in winter will increase the energy consumption of air conditioning,while it will decrease in summer.(4)Morris multi parameter sensitivity analysis shows that the biggest factor affecting the cabin light environment is the angle of blind shading,the biggest factor affecting the cabin thermal comfort and energy consumption is the design value of cabin heating and cooling,followed by the influence of shading angle,window wall ratio and window thermal conductivity.