2013年03月05日
Desiccant outdoor air temperature and humidity
The problem of environment and energy sources has become a hot issue faced by the whole world, with the development of economy and the improvement of people's living standard, the energy consumption of building energy consumption in the proportion of more and more. Therefore, to reduce building energy consumption, advocate and promote green building has been the effective means to alleviate the problem of energy. Green building refers to the whole building life cycle, to maximize resource conservation -- energy saving, water saving, section, material saving, protect environment and reduce pollution, provide health, application and efficient use of space for the people, and the natural harmonious coexistence of architecture .
The project construction is a small office building, located in Shanghai City, Songjiang District ( Yi Building), the total construction area of 3000 square meters, building structure on the underground layer, 5 layer. In order to build a demonstration effect of the low carbon office building, the project at the beginning of the design will be energy saving, environmental protection concept into every detail of the building. Through the external wall insulation, shading, roof leisure balconies and other measures to improve the thermal insulation performance of building envelope, in a passive way reduces the HVAC system, the sensible heat load, create the conditions for the use of radiation refrigeration system. HVAC system, this project adopts independent temperature and humidity control, radiation cooling system is mainly based on renewable energy as a cold source of their own, to eliminate most of the sensible heat load, dehumidifying fresh air system is responsible for the elimination of all wet and partial sensible heat load, and at the same time, responsible for controlling the indoor oxygen content, to create a constant temperature, constant humidity, constant oxygen office space. In addition to HVAC system energy saving lighting system, the building also used energy-saving measures: according to the season, time, sunlight, automatically adjust the external shading system, automatically adjust the angle LED lamp in the office according to the outdoor light intensity of illumination system. The whole building operation is controlled by the BMS building automation system of unified management, cold and heat sources, the radiation system and terminal system, fresh air system, lighting system, external shading system and zoning control, management, data recording of a building, so as to create a comfortable office environment and save energy, reduce operating costs play an important role in. This paper will focus on the introduction of the HVAC system radiation refrigeration system and fresh air dehumidification system, energy-saving measures, the control logic and the related design parameters .
The 1 radiation refrigeration system
1.1 system structure
In summer, there are a total of three cooling source: pipe for the selection of high temperature water heat pump system using buried, solar air conditioning, soil source, energy management center under the different climatic conditions, give priority to the solar and ground source principle to select or collocation. From the cooling output energy management center through the transmission and distribution pipeline supply most of the radiation cooling end, to eliminate indoor sensible heat load. Also provides part of the cold fresh air handling unit to the precooling segment, consumption of high grade energy to reduce fresh air handling process.
The operation principle of 1.2 cold source system
1.2.1 ground-coupled pipe
In this project, the soil source buried pipe plays a role in following aspects: direct exchange of soil in the cooling capacity of refrigeration system using radiation, ground source heat pump in winter as the host the source side is radiant heating system to provide energy, spring sunny days storage part of the solar refrigeration unit for the cold, autumn storage part of solar energy the collector to collect heat tomi solar cell.
Ground source heat pump this project using a single U vertical buried pipe, the actual depth of 102 meters, 100 meters deep well, drilling diameter is 140mm, the design of vertical drilling a total of 40, divided into two groups. One group of 7 wells, the summer as cold water heat pump source side, dehumidifying section for fresh air handling unit to provide energy. The remaining 33 as a group, in the early summer water temperature can be directly extracted for radiative cooling end use for delay rises, the indoor temperature at night and holidays in the summer of the water temperature drops below 26 degrees below 22℃.
In order to withstand autumn solar water heating soil temperature and pressure pipes and fittings, using PE-RTII type buried the project tube, vertical tube for single UDe32mm.
The project construction is a small office building, located in Shanghai City, Songjiang District ( Yi Building), the total construction area of 3000 square meters, building structure on the underground layer, 5 layer. In order to build a demonstration effect of the low carbon office building, the project at the beginning of the design will be energy saving, environmental protection concept into every detail of the building. Through the external wall insulation, shading, roof leisure balconies and other measures to improve the thermal insulation performance of building envelope, in a passive way reduces the HVAC system, the sensible heat load, create the conditions for the use of radiation refrigeration system. HVAC system, this project adopts independent temperature and humidity control, radiation cooling system is mainly based on renewable energy as a cold source of their own, to eliminate most of the sensible heat load, dehumidifying fresh air system is responsible for the elimination of all wet and partial sensible heat load, and at the same time, responsible for controlling the indoor oxygen content, to create a constant temperature, constant humidity, constant oxygen office space. In addition to HVAC system energy saving lighting system, the building also used energy-saving measures: according to the season, time, sunlight, automatically adjust the external shading system, automatically adjust the angle LED lamp in the office according to the outdoor light intensity of illumination system. The whole building operation is controlled by the BMS building automation system of unified management, cold and heat sources, the radiation system and terminal system, fresh air system, lighting system, external shading system and zoning control, management, data recording of a building, so as to create a comfortable office environment and save energy, reduce operating costs play an important role in. This paper will focus on the introduction of the HVAC system radiation refrigeration system and fresh air dehumidification system, energy-saving measures, the control logic and the related design parameters .
The 1 radiation refrigeration system
1.1 system structure
In summer, there are a total of three cooling source: pipe for the selection of high temperature water heat pump system using buried, solar air conditioning, soil source, energy management center under the different climatic conditions, give priority to the solar and ground source principle to select or collocation. From the cooling output energy management center through the transmission and distribution pipeline supply most of the radiation cooling end, to eliminate indoor sensible heat load. Also provides part of the cold fresh air handling unit to the precooling segment, consumption of high grade energy to reduce fresh air handling process.
The operation principle of 1.2 cold source system
1.2.1 ground-coupled pipe
In this project, the soil source buried pipe plays a role in following aspects: direct exchange of soil in the cooling capacity of refrigeration system using radiation, ground source heat pump in winter as the host the source side is radiant heating system to provide energy, spring sunny days storage part of the solar refrigeration unit for the cold, autumn storage part of solar energy the collector to collect heat tomi solar cell.
Ground source heat pump this project using a single U vertical buried pipe, the actual depth of 102 meters, 100 meters deep well, drilling diameter is 140mm, the design of vertical drilling a total of 40, divided into two groups. One group of 7 wells, the summer as cold water heat pump source side, dehumidifying section for fresh air handling unit to provide energy. The remaining 33 as a group, in the early summer water temperature can be directly extracted for radiative cooling end use for delay rises, the indoor temperature at night and holidays in the summer of the water temperature drops below 26 degrees below 22℃.
In order to withstand autumn solar water heating soil temperature and pressure pipes and fittings, using PE-RTII type buried the project tube, vertical tube for single UDe32mm.
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