China actively promotes the construction of 3 million square kilometers of marine territory

and is vigorously building the Xisha and Nansha islands in the south China sea at present. The climate of islands and reefs in the sea is quite different from that of continent

and is featured by high temperature

high humidity and intense radiation. Combined with the fact of scarce resources on the island

it is inevitable to research and develop low-energy buildings under this special climatic conditions. In order to determine the characteristics of the low-energy building envelope suitable for island-reef climate

this paper analyzes the characteristics of marine climate by taking the measured data of Xisha as an example. To study the influence law of window-to-wall ratio (WWR) on energy consumption

this paper dynamically simulates the annual refrigeration consumption of one hotel to be built on the island. Results show that moisture load accounts for about 40% of the total cooling load. In summer

the total cooling load of the west room is the highest

south room the lowest. Once WWR increases 0.1

the energy consumption increases 3-5 kWh per unit area

but the variety of WWR in west and east takes big effects on building energy consumption than that in south and north. The fractional energy saving of the comprehensive sunshade is 7%

the best of all. The results of this study are intended to provide a reference for the reasonable value of WWR in the South China sea.