Thinking of district energy system based on HVAC professional perspective Concept， planning and design
Broadly speaking, regional energy is defined as: "In a particular area, all forms and grades of energy required for people's production and life are reasonably, integratedly and efficiently produced, transmitted, distributed, utilized and consumed. Scattered". In a narrow sense, regional energy is defined as: "The integrated integration of district heating, district cooling, district power supply, and energy systems that address regional energy needs. The regions referred to here can be administratively divided cities or various parks, Or a building complex." Regional energy provides energy services to buildings and other service objects through the energy network system to achieve the reception, production, transmission and distribution of primary and secondary energy; the main forms of energy usually include electricity, gas, and hot water. /Steam (regional heating), cold water (regional cooling); the system types involved are: boiler room heating system, chiller cooling system, thermal power plant system, combined heat and power system, heat pump energy supply system, solar energy utilization System, wind power generation system and biomass energy system, etc. Different forms of energy services in the region usually run in parallel, so an important role or value of regional energy is: "Based on the specific end energy needs (form, grade, and dissipation) in the region, through the optimization of the energy system running in parallel Integration to achieve grade correspondence and temperature
Counterpart, cascade utilization, multi-energy complementary energy production, supply and utilization".
Aiming at district energy system's concept understanding， main planning points and energy,station design， straightens out and analyses the problems existing in cognition and implementation from the
perspective of HVAC engine crs.The main points are：1.District energy is not a specific form of energy，but the integration of various forms of energy systems based on terminal demand， energy saving and
emission reduction objectives； 2.District energy is a planning concept， layout， technology r
management of energy aiming at improving district energy efficiency and reducing energy consumption； 3.
District energy planning should be basc don the terminal demand， and substitute the demand sid
for the traditional thinking of comprehensive energy supply； 4.Construction of centralized ener
can not be simply regarded as the ultimate goal of district energy planning； 5.Special attention
paid to the study of terminal load in planning district energy system， which is directly related to energ
system configuration， equipment selection， energy saving and carbon emission calculation， and economy；
Designs of centralized energy station should adopt the performance-based method， also 7key points of
design should be pay more attention to.
Keywords
district energy， distributed energy， energy station， system efficiency， performance