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Week 4: Utilities ((Involves) Electricity: flow of electric charge. (Some…

- - - - A = C/s
  - - - . Electrical energy flows through a portion of the body causing a shock
        
        effects
        
        result in no injury at all or may result in devastating damage or death
        
        Burns are the most common injury from electric shock.
        
        Preventions
        
        Avoid water (It increases the conductivity of the electric current.) at all times when working with electricity
        
        Plug a 3-prong extension cord into a grounded outlet
  - - - Power = voltage x Current
- - - - Condenser: transfers heat from the refrigerant (e.g. the part behind the fridge that feels hot).
      - Expansion valve/ throttling device: controls the flow of refrigerant in the refrigerator.
        
        (refrigerant)enters the inlet and screen as a high-pressure liquid.
        
        (refrigerant flow) restricted by a metered orifice through which it must pass.
      - Compressor: raises pressure and temperature of the refrigerant
      - Evaporator: allows the refrigerant to turn from liquid into gas in the refrigerator, thereby absorbing heat from the contents of the refrigerator.
  - - - R-134a: hydro-fluorocarbon (HFC) that does not contribute to ozone depletion; also the first non-ozone-depleting fluorocarbon refrigerant to be commercialized.
        
        widely used in many air conditioning and refrigeration systems globally.