The Application Research On Water Heat Pumps With The Cold And Hot Load Existing Building In South China

With the development of economic society, environmental pollution and energy shortage increasingly serious, enhance the development and utilization of renewable energy, has become a national sustainable development requirement. The surface water resources in South China is rich, has the natural conditions of using surface water source heat pump. Therefore, for the power consumption for air-conditioning of South China, the energy conserving potential analysis of the surface water source heat pump system is necessary, put forward using the cold and hot load coupling in building itself to improve the running efficiency of the air-conditioning in South China.This paper established the building energy consumption model to build hotels, schools and hospitals three main types of buildings which has hot and cold needs, through the analysis of building load characteristics show that the construction of cold and hot load proportion of load spectrum under 30% load rate reached more than 50%, this provide certain reference basis for the selection of air-conditioning. Per unit area hot water load index: the student dormitory > ward > hotel, building per unit area hot water load decreases with the increase of per-capita living space.This paper use area ratio 1:2 of outpatient building and hospital wards in hospital as an example, established energy consumption analysis model, by the energy consumption analysis of the two kinds of setting design scheme and the corresponding conventional air conditioning system obtained that: to the corresponding conventional air conditioning system, the surface water source heat pump room side total energy consumption is energy-efficient of 33.3% and 34.3%, and use different size collection, the air-conditioning is more energy efficient.This paper established the cold and heat coupling evaluation index, according to the surface water source heat pump system energy saving rate of three kinds of building changing with the living-building area proportion, analysis the relationship between the cold and heat coupling evaluation index changes and the energy saving rate: with the increase of guest room area proportion, the cold and heat coupling evaluation index of hotel decreases, the surface water source heat pump system energy saving rate increased; With the increase of dormitory area proportion, the cold and heat coupling evaluation index of school decreases, when cold and heat coupling evaluation index reached 1.94, namely that the school area ratio is 1:1, the surface water source heat pump system energy saving rate is at its maximum, it is the most suitable cold and hot tie-in proportion for school buildings; With the increase of inpatient area proportion, the cold and heat coupling evaluation index of hospital decreases, when cold and heat coupling evaluation index reached 2.23, namely that the hospital area ratio is 1:1, the surface water source heat pump system energy saving rate is at its maximum, it is the most suitable cold and hot tie-in proportion for hospital buildings.This paper established water thermal model, analysis the required water area with the residential area percentage and water depth change rule of the three kinds of architectural that surface water source heat pump system in the summer and winter under the condition of meet the specification requirements. The water heat dissipation of building in summer: the school < hospital < hotel, The water heat dissipation in the most hot summer weeks is four times more than the most cold winter weeks, therefore, we only need to consider the summer conditions in the practical engineering of water thermal pollution.