An Experimental Research on the Application of Ground Source Heat Pump and Floor-Heating System in the Greenhouse

摘要

This paper presents an experimental research on greenhouse heat supply in winter taking the ground source heat pump as the heat source and the floor-heating system as the heating method. The experiment reveals that the application of floor-heating system in greenhouse allows a decreasing trend of the indoor vertical temperature distribution from the plant roots to crowns and finally to the upper space of the greenhouse and a small circadian temperature difference that are advantageous for plant growth. Experimental greenhouse heating system, with a COP value of 3.79, may conducing to saving 47.4％ of energy compared to the greenhouse using coal-fired boiler and floor-heating system, or even saving as much as 62.5％ of energy by contrast with the greenhouse based on coal-fired boiler and traditional heating system.