District heating and cooling for efficient energy supply

摘要: Supplying customers with heating and cooling energy from district systems essentially contributes to the rational use of environmental protection. In past few years, has been significantly increased in some countries. The supply for urban districts is usually separated. While a part supplied natural gas or uses liquid fuels purposes, other may be by heat network. Cooling are based on electric most cases very small units. this case, capacity such unit covers needs only building, office even apartment, not whole group buildings. Many times particular technologies energetically inefficient environmentally friendly. There many different sources same environment. Then should used, that environmentally, technically economically acceptable. paper concepts presented their efficiencies discussed. possibilities improvement existing pointed out. Development directions presented. Based analysis, solutions which enable energetically, best results A method exergetic efficiency determination kinds chillers described comparison chillers' trigeneration system, including loop, shown.