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Recent content by remp

  1. remp

    Stair well pressurization

    Get your hands on Australian Standard 1668.1 It gives a min m/s velocity across open doors and how many doors deemed open and depending on type of pressurisation system
  2. remp

    Primary/Secondary chilled water system pumping - variable primary - variable secondary

    Primary/Secondary chilled water system pumping The traditional primary/secondary pumping system is variable secondary pumps and fixed speed primary pumps with a decoupling line between Can you have variable speed primary pumps whereby the chilled water flow rate through the evaporator varies...
  3. remp

    Pressure reducing capacity

    Hi LittleInch The new user is brand new, adding to existing users. Is the mass flow rate (kg/hr) the same either side of the PRV? R
  4. remp

    Pressure reducing capacity

    Hello I have a boiler system in my factory running at 7 bar. I have a new user requiring 1,000Kg/hr of steam at 2 bar. I will have to install a pressure reducing station to drop from 7 bar to 2 bar. My question is will my boiler be delivering an extra 1,000kg/hr at 7 bar or will it be a...
  5. remp

    De-rating of a steam boiler - formula

    Hello If I have a 10,000 kg/hr steam boiler but only run it at say 7 bar, is there a formula I can use to de-rate the boiler output to calculate its revised capacity in Kg/hr Regards R
  6. remp

    Minimum outside air on VAV

    Hello, Does anyone have a genuine control strategy to control and maintain minimum outside air on a VAV system? Thanks!
  7. remp

    Desicant Wheel Dehumidifier

    Drazen I understand the bit about taking in a small portion because that's all that is need to get to the desired RH, but why take in before the main cooling coil and deliver out after the main cooling coil. I have seen another installation on the same site and the dehumidifier takes in a...
  8. remp

    Desicant Wheel Dehumidifier

    I am upgrading an existing air handler and its BMS controls that is about 15-18 years old. The air handler looks pretty typical for Pharma with full fresh air, filters, heating coil, cooling coil and fan with zone reheats. Because the %RH requirements for the space are low, humidity 30%, they...
  9. remp

    Damper actuator on/off & modulating

    Dave, If I take any mod actuator 0-10v and break the 0-10 v signal will I use the 24 v power supply to operate on/off ?? Billy
  10. remp

    Damper actuator on/off & modulating

    Hi , I am looking for an actuator to work in a fire type situation for auto and manual control through a control panel The actuator is to be both modulating when in auto and on/off(open/closed)when in hand at the panel The actuator will be spring return and with power on it 24 V it will open...
  11. remp

    Humidifier problem

    Hello I have an air handling unit with a new steam to steam humidifier. The humidifier is fairly basis and maintains the room level humidity set point pretty good. Only thing is it sometimes sets off the smoke alarm in the supply duct and even in the rooms. Any tips for getting residual steam...
  12. remp

    Economy cycle - free cooling

    I have an air handlig unit that has a fixed outside air damper and a fixed return air damper. Outsdie temps vary from -5 to 25 dgeC so I want to add economy cycle control to the unit. I will install an entalphy sensor outside and one on the return air duct. If the return entalphy is greater...
  13. remp

    Fan Dischrage - perforated plate

    Hi I am installing a heating coil directly in front of a centrifugal fan outlet in an air handler. I want to disperse the air before it hits the coil with a perforated plate infront of the fan. Does any one have informaiton or tech data on the idean distance between the fan and perforate plate...
  14. remp

    Fire trip

    I work in a facility with dozens of air handlers and fans. If one of the buildings goes into fire mode due to smoke detector alarm all the AHUs shut down as per the control strategy for that building. When the fire trip is cleared back at the main Fire Panel (usually after a fasle alarm) some of...
  15. remp

    Anit vibraiton mounts for a table

    Hi I have a tablet press machine in the middle of a production room making tablets. Next to the machine (3 ft away) I have a desk with a weight scales on it for measuring etc...The desk is on 4 legs and bracketed to the back wall. There is a slight vibraiton coming from the floor when the...
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