## 1 Introduction
In addition, [PERSON] [23], [PERSON] [24], and [PERSON] [25] summarized the existing correlations between CHTC and wind speed in the literature. However, there are two main problems for the full-scale measurements mentioned above: Firstly, the climatic environment, experimental conditions, and operations were respectively different in the processes of obtaining the correlations, leading to CHTCs under the same wind speed being very dissimilar. Thus, these CHTC predictive formulas, which were surveyed in specific environment conditions, cannot be commonly used in the tropical island region. Secondly, the heat balance method was used universally in the field measurements above, and it is an indirect test method involving many experimental instruments. Furthermore, the difference value of temperature between ambient air and the envelope surface is required to be more than 15 \({}^{\circ}\)C. Comparatively speaking, the heat-mass transfer analogy method is a direct test, without having to measure the envelope surface heat transfer and solar radiation. As a result, this method uses less instruments, which could reduce cumulative errors and improve ease of operation, helping to solve the difficulties of discommodious traffic and harsh experiment conditions in tropical island regions properly. Recently, [PERSON] et al. [26; 27] exploited a novel method based on the analogy theory of heat and mass transfer, and performed a full-scale measurement of CHTC. Moreover, the feasibility of this method was validated by contrasting with the heat balance method aimed at the same building in an identical test environment. Thus, according to the foregoing literature survey, to obtain a reasonable value of CHTC, a full-scale measurement based on the theory of heat-mass transfer analogy in the tropical island region would likely be a very effective attempt. There were few reports on either experimental or theoretical aspects of EHTCs. [PERSON] et al. [28; 29] carried out relevant exploration on the relationship between EHTC and CHTC in the late 1970s and early 1980s. [PERSON] et al. [30] proved the general relationship of EHTC and CHTC on a wet surface based on the Lewis criterion, and found that EHTC was largely affected by wind speed. [PERSON] [31] investigated the heat transfer coefficients on dry or wet building surfaces in three Chinese cities, and found that the heat transfer coefficients on wet surfaces were obviously larger than those on dry surfaces. [PERSON] et al. [32] also drew a similar conclusion that evaporation on building surfaces affects total heat transfer coefficient size. Through these scanty studies on EHTC, we knew that the strong wind and heavy rainfall in tropical island regions would work together to make EHTC large. Considering the weather features with abundant wind and rain in tropical island regions, if the envelope surfaces are still treated as dry and evaporation is ignored, there would probably be large deviations for THTCs. Therefore, the degree of influence of EHTC on THTC needs to be discussed, and THTC would be more reasonable if EHTC was added for tropical island regions. In this study, a naphthalene sublimation experiment based on heat-mass transfer analogy was adopted to conduct a full-scale measurement of CHTC in the tropical island region, and a simplified calculation model of EHTC was put forward. Subsequently, a statistical analysis was performed to explore the changing conditions of heat transfer coefficients, wind speeds, and rain hours at different times. Finally, the paper discussed the degree of influence of EHTC on THTC, indicating that EHTC cannot be directly ignored for tropical island buildings, and a comparison between research results and China's standard regarding THTCs was made. This study makes up for the lack of surface heat transfer coefficients in energy conservation design of tropical island buildings, improving the calculation accuracy of air-conditioning loads in tropical island regions.