The Study Of Energy-saving Measures For TGHP’s HVAC System

TGHP is located in the summer and cold winter areas in China, a long period of hotand humid, the annual energy consumption of the HVAC system for the protection ofthe reliable operation of the factory production equipment, up to35million kWh,energy-saving potential is huge. In-depth study of the TGHP energy consumption andenergy saving potential of the HVAC system, the proposed energy optimizationprograms and rehabilitation measures in the HVAC system, is bound to bring aboutsignificant social and economic benefits for the construction of China’s nationaleconomy.On the situation on the basis of in-depth understanding of the HVAC system of theTGHP, layout, and other key equipment in the operating parameters of the typicaloperating conditions measured, combined with running the department for many yearsthe records of the energy consumption of the system, to carry out the audit work of theHVAC system energy consumption grasp the relationship between energy consumptionand equipment operating status, and evaluation of the various aspects of energyconsumption and energy efficiency level. On energy audit of the annual energyconsumption of the HVAC system of the whole plant of a total of35,208,804kWh,which accounted for70%of the energy consumption of air-cooled host, great potentialfor energy saving, energy saving key links.Grasp the TGHP energy consumption of HVAC systems and energy efficiencylevels on the basis of investigating the condition of the local natural resources, to graspenergy saving key links proposed energy optimization program. Field measurement, theair-cooled unit average energy efficiency ratio of2.1. The transformation for thewater-cooled air-cooled host will greatly enhance the host EER. The research found thatthe TGHP the main transformer drains with host exactly the same layout on the plantand dam platform as cooling water, not only transform the simple cascade utilizationcan be realized on the river cold. Test, from July to August the main transformerdrainage average temperature of27.0°C, single displacement of up to300t/h or moreabove the cooling water, and the the Technical Water Supplying water qualityrequirements, so the water temperature, water, water quality, and meet requirements,air-cooled host transformation is feasible hydrocooling.The same time, taking into account the office area of the TGHP air conditioning load differences, and inconsistent use of time should be detached office zone HVACsystem, both to save energy, but also simplify the system, easy operation andmanagement; unit control room and the the excitation transformer room are a yearcooling area winter cooling load transformer drainage by increasing the direct coolingof the plate heat exchanger, when the cold, open the host supplemental cooling. Thus,the proposed year cooling area winter outdoor, office area independent control ofenergy-saving programs. In addition, for the focus of energy saving-air-cooled host,raised the old machine and the trade-in two forms.Determine the initial transformation program, the optimum scheme selection. Theenergy saving of the program1amounted to10,674,830kWh, a total investment of￥8,617,367, with a payback period of5.85years; the energy saving of the program2amounted to13,916,319kWh of energy conservation, the total investment of￥6,053,734, with a payback period of3.22years. Program1better than program2,energy efficiency is very impressive, and ultimately determine the energy-savingtrade-in program.Finally, the energy saving, and work out the specific transformation step.1) Tochange the existing air-cooled host flooded efficient screw chiller (heat pump) unit,additional refrigeration room. The same end of the device.2) Year cooling area, watercooled chiller cooling in the summer, increased winter plate heat exchanger cooling bytransformers drainage directly, indoor temperature exceeds a set value, on the hostcomplement cooling.3) The office area independently controlled by the opening orclosing of the valve, as well as a simple transformation of piping.In summary, the HVAC system of the TGHP construction transformation under theguidance of this article, you must be able to obtain a good energy saving effect, andbring about significant social and economic benefits. In addition, the energy-savingHVAC system design of future large-scale hydropower has certain reference value.