DDC Controller as a Temporary Measure to Substitute a Defective BMS System
The existing local control panel is switched to manual operation. The new DDC controller can send out pulse signal to start the chillers and chilled water pumps according to the…
Modified PAU for Dehumidification
Modification of existing PAU with additional dehumidification section was successfully performed for a hotel. The room air conditions of guest rooms can be kept at 22 deg. C and 55%…
Break Tank Water Level Control – Water Supply for Cooling Tower System
High level alarm also provides high level cut-out function to prevent overflow from the break tank due to malfunction of high level cut-out relay. Low level alarm also provides low…
Plate Type Heat Exchanger – Verification of Technical Data
Design calculation of a heat exchanger is a trial and error process. Supplier provided data can be verified. The enlargement factor, safety factor (over surface) and fouling factor are essential…
Heat Pump For Swimming Pool Application
Heat Pump Selection Based On The Heating Capacity
Portable Water Pressure Control with Various Speed Water Booster Pump
The water booster pump should be sized to maintain design flow flow rate and pressure. The pneumatic water pressure tank should be sized to maintain required water pressure for a…