The complementary heating energy ratio research of solar: Ground source heat pump and heating network in cold regions

Abstract

To propose solar - ground source heat pump and heating network complementary form of heating system, select the baseline of building in cold regions, we use Dest software for dynamic load simulation system to determine the different heating period of operating mode, according to the heating relative load ratio during the entire heating season. Taking TRNSYS transient simulation software as the platform, the complementary heating systems simulation model is established to determine the best ratio of the energy of the complementary heating system. For the benchmark construction of the cold regions, the longest time from 20 to 70 % of the design load, accounting for 63 % of the total heating time, but the time of maximum is only 1 h, and average load accounts for 25.14 % of the design load; solar energy heat can reach 89.61 % of the entire heating season and the dynamic shortest payback period is 8.77 years; solar energy as a complement thermal systems, unit air conditioning area corresponds to the collector area is 0.045 m2, the water temperature can reach 50 °C, get the maximum cost to the present value at the same time and the economic effect is the best. © Springer-Verlag Berlin Heidelberg 2014.