Research on Heat Load and Energy Consumption of Greenhouses in Cold Districts based on Measured Wind Speed and Air Temperature by Weather Observation

Abstract

Firstly, this paper describes the measured wind speed and air temperature that affect the maximum and annual heating load of greenhouse for a flower plant in cold districts. The investigation revealed that the maximum heating load in a year was mainly due to the highest wind speed but not the lowest air temperature. Secondly, by using the equation obtained by multiple regression analysis of measured data, the daily and annual heating load in cold districts was calculated from the average daily air temperature, wind speed and the number of hours of sunshine. Carbon dioxide emission calculated from the annual heating load of greenhouses in cold districts was about twice that of individual and apartment houses. This suggests that the replacement of the total or a part of fossil fuels consumed in greenhouses by renewable energy such as woody biomass of local forests is effective as global warming countermeasures.