Abstract
Climate has a key impact on building energy efficiency. The impact of climate change on heating and cooling degree-days of China during the past 60 years was studied in this paper. The meteorological data of 613 cities published by National Climate Center of China was applied in this research. The study results showed that the impact of climate change on the spatial distribution characteristics of heating and cooling degree-days is obvious. The area with HDD18 °C over 2000 d·°C has dramatic shrunk during recent 30 years compared with the period from 1964 to 1983, while the area with CDD26 °C over 90 d·°C has expanded during recent 30 years. The impact of climate change on the HDD18 °C and CDD26 °C of each city is inhomogeneity. The decrease of HDD18 °C mainly occurred in the north and northwest of China, and the increase of CDD26 mainly occurred in the southeast of China. The outcomes of this paper may provide a theoretical basis for building energy efficiency design in future.
Highlights
Climate change has aroused much concern around the world in recent years
Christenson and Dombayc found that the decrease of heating degree-days and the increase of cooling degree-days depended on the threshold temperature and location, and the current weather data used for building design would lead to overestimate heating demand and underestimate cooling demand [11,12]
Heating degree-days (HDD) is defined as the negative deviation of daily outdoor air temperature (t_o) from the base temperature (t_b) in a year, which means that the heating is needed to keep indoor air temperature within the comfortable level when the outdoor air temperature is below the base temperature
Summary
Climate change has aroused much concern around the world in recent years. The fifth assessment report by Intergovernmental Panel on Climate Change (IPCC) indicated that the total increase between the average of the 1850–1900 period and the 2003–2012 period is 0.78 °C [1]. Plentiful study results indicated that climate change will have a distinct impact on building energy consumption in future [2-6]. OrtizBeviá investigated the evolution of heating and cooling degree-days in the Spain according to the present and future climate data, and the analysis results showed that the cooling degree-days have increased 50% compared with their values in the historical period [9]. Frank studied the impact of climate change on office and residential building heating and cooling energy demand by using the hourly weather data scenarios for the Zurich–Kloten location, and indicated that the annual heating energy demand of residential buildings would decrease 33-44% during the period 2050-2100, and the annual cooling energy demand of office buildings would increase 223-1050% during the same period [10]. Christenson and Dombayc found that the decrease of heating degree-days and the increase of cooling degree-days depended on the threshold temperature and location, and the current weather data used for building design would lead to overestimate heating demand and underestimate cooling demand [11,12]
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