Refrigeration第 56 / 110 题
A thermostatic expansion valve (TXV) controls refrigerant flow into the evaporator to maintain what?
a.Constant condenser pressure
b.Constant compressor speed
c.A relatively constant evaporator superheat
d.Constant subcooling
解析
A TXV modulates refrigerant flow to hold a stable superheat at the evaporator outlet, matching flow to the load. This keeps the coil fed efficiently and protects the compressor from liquid floodback. It responds to the temperature and pressure of the suction line.
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同考点相关题目
- In the basic refrigeration cycle, which component absorbs heat from the conditioned space?
- What is the primary function of the compressor in the refrigeration cycle?
- The condenser in an air-conditioning system performs which function?
- Superheat is defined as the temperature of the refrigerant vapor above what?
- A technician measures a suction pressure whose saturation temperature is 40 F and a suction line temperature of 52 F. What is the superheat?
- Subcooling is measured at which point in the system?