View Full Version : Fundamentals

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  1. Ok another stupid question
  2. Duct losses determination
  3. Can I increase the freezing performance with any modifications?
  4. Milk processing
  5. rule of thumb plant sizing
  6. Identification frost formation
  7. Engineering questions
  8. Black out system
  9. Superheat on a freezer running on R-404
  10. AIRAH DA9 Heat Load Calc
  11. Minimal flow requirement for a domestic heat pump
  12. Causes of pressure release valve activating
  13. R404a water cooled condensing unit with 8oC cooling water
  14. Freezer 'Total suction line superheat'
  15. Coil freezing with 5 degree c suction?
  16. Cool Room Evap Icing Up
  17. isoenthalpic vs isoentropy refrigeration process ?
  18. Need Help In vapor absorption Refrigeration
  19. Pressure relief valve selection
  20. Charging of the system through the low side.
  21. practical way of removing air in system
  22. Chillers Cost Savings
  23. Refrigerant reclaim
  24. Changing both controller and inverter PCB assemblies
  25. Need some advice on engineering project
  26. Coldroom conversion r22 to r404a
  27. T.D Delta T
  28. Air Conditioning in a hot climate
  29. Reach in Cooler Design Review
  30. Hotgas reheat- modulating or not
  31. Oil in Liquid sight glass
  32. Working out energy consumption
  33. using a TXV as a control valve for cooling water or air
  34. heat load calculation in an enclosure
  35. Cooling Load
  36. Unit Cooler Ice Up
  37. coldroom software and its related books.
  38. Re:LP pressure switch
  39. Cold Store Floor Temperature
  40. How much liquid?
  41. Glide/Superheat
  42. heat transfer coefficient for a vehicle
  43. flow rates, temperature and pressure - valves questions
  44. help needed in AC r22 gas refilling , confused with units
  45. Homemade liquid nitrogen generator
  46. simple stuff
  47. clarification
  48. Is there a way to work out operating pressure?
  49. Clarification
  50. Query
  51. Ask help
  52. Compressorless
  53. Altering a Multideck's system
  54. COP cooling and heating
  55. Multiple air-cooled condensers with condenser-less Chiller
  56. pressure temperature chart
  57. Compressor Burn Out Help
  58. overall heat transfer coefficient for sphere based heat exchanger
  59. Gauge manifold question - High side gauge flickering?
  60. Manufacturers of Environmental test chambers
  61. saving energy on coldroom
  62. Compressor housing, low side, or high side and why?
  63. Parasite called Sarah
  64. display chiller not getting cold enough
  65. Consultancy?
  66. Need help with SO2 fumigation
  67. Another coldroom...
  68. Pressure Enthalpy
  69. LG Multi Split MU5M40
  70. Way to Determine if a TXV is Present?..
  71. Scrolll running backwards
  72. Thermostatic expansion valve orifice size for variable loiads
  73. What to choose
  74. Thermostat cut in and cut out
  75. Hi****ube material
  76. Newbie Question: QL vs. QH efficiency
  77. Need help with Superheat
  78. Cooling cooking oil, how many power needed?
  79. Saturation and other help
  80. low ambient condenser operation
  81. question in coolpack
  82. Non-condensable's and Sight Glass Bubbles
  83. forced air VS natural air(cold wall) refrigerator?
  84. Density oil York L
  85. Help with Transition Pressure Loss Calculation
  86. fundamentals vs fundamental belief
  87. chiller on/off temps
  88. Adding oil to compressor
  89. Variable ratio in screw compressor
  90. Using cooling tower BAC in hard winter
  91. Heat Pump problem. How can I solve this? What are the steps ?
  92. Variable Amperage And Cold Liquid line
  93. Supply Temperature in an AHU
  94. York YCIV0590 high pressure cut out
  95. p-h &t-s chart
  96. Clarification about reversing valves
  97. Condenser water inlet & outlet temperature
  98. Freezer and Chiller running of 1 condensing unit.
  99. Load Calculation
  100. Temperature Gained?
  101. VRF/VRV exact compressor motor and power type
  102. Procedure to design a cooling chamber
  103. Balancing Valve
  104. Multi fit fan motor noise problem
  105. Hot Gas Reheat
  106. -90C Cold room?
  107. 30C to 20C in one hour?
  108. R410A Piping Distribution System - Pressure Test rating
  109. refrigerant mass inventory
  110. Sporlan LAC-10 with remote bulb. Where to install the bulb?
  111. Strongest filler metal?
  112. r22 to 13a
  113. carrier condenser fan motor
  114. Will Reclaiming mix of Nitrogen Break Re-claimer
  115. Compressor start in vacum. What is happened?
  116. Coefficient of performance
  117. Energy Saving - Commercial fridge
  118. need help for brazing HVAC lines
  119. Help Picking Cost Effective Propane Refrigeration Compressor
  120. How cold will it get?
  121. Slow leak testing
  122. ice machine uneven ice on evap.
  123. TXV Equalization line with flared connection
  124. Algorythm
  125. Eurofrigo C2500XTS with the Microstat (controller). Error AL6.
  126. Use of FRP Insulated Underground Storage Tanks for Off Peak Chilled Water Storage
  127. Calculation of Refrigeration capacity
  128. determining coil static pressure
  129. holding lectures, any ideas?
  130. Help!!! How Do I Convert OFN from Litres into Kilograms?
  131. Compressor question
  132. Re: Compressor question 2
  133. Refrigerant pressure in an idle unit? (compressor not running)
  134. R410A in a R404A Compressor
  135. Ejectors
  136. -40F mod for small freezer?
  137. Wiring a Embraco Compressor
  138. DIY Compressor Wine Cooler Help (Newbie)
  139. Horizontal Evaporators
  140. Effect brazing steel-copper with R-600 application
  141. Sub cooling from a condenser
  142. ite refrigeration scale calibration
  143. Designing a Condenser
  144. Fitting drier to receiver
  145. Circuits - general rules
  146. Physique have changed!!
  147. HITACHI compressor oil
  148. Thermosyphon
  149. DIY - Refrigerant Recovery Machine - help needed
  150. R12 vs R22
  151. What is cooling capacity in Fg/h
  152. DE superheater /Heat pump in the chiller
  153. Chemical wash on condenser of chilleers
  154. OFN bottles
  155. Unable to comprehend graph of aqueous lithium bromide vapour pressure
  156. Pressure Balancing in TXV
  157. Parallel use of Centrifugal fans in HVAC
  158. How can my system do what I need??
  159. Buffer tank
  160. Ambguity in Refrigeration tonnage of Chiller
  161. Refrigerant pumps
  162. How to determine the correct air over an evaporator coil
  163. Superheat
  164. Refrigeration system calculations
  165. removing oil from a system
  166. Looking for Smallest 12V DC compressor. For a mobile refridgerator
  167. Are Aspen Compressors any good
  168. R410a condensing temperature
  169. Calculationwith Evaporation Temp and A consumption
  170. Charging gas with recovery station ?
  171. 3/16" and 1/4" tubing pressure drop tables
  172. Single stage -40 C
  173. Need a few thoughts on the desired suction pressure/temp on salt water brine system..
  174. Pressure ratio vs compressor input
  175. Cleaning of Ammonia system after installation
  176. Reducing diameter of rising suction pipe for oil return
  177. system without refrigerant
  178. Refrigeration
  179. VSD's and their Drive Belts.
  180. Winter - Low Head Pressure
  181. Brazing technique
  182. Taking care of condensation in DIY Wine Cooler
  183. Request Help
  184. compressor built for 50 hertz when operated at 60 hertz.
  185. Minimum normal suction pressure for R134a chiller
  186. Frost Heave Prevention and Floor Insulation in Cold Rooms
  187. 3GS vs r134 in a noisy car ac compressor
  188. How to test a stored "pumped down" condensing unit.
  189. Power factor for 220 single phase Copeland compressor sealed
  190. Ammonia
  191. Defrost calculation
  192. Grasso 2 stage package
  193. Placement of blowers
  194. Condensation on glass door showcase
  195. Low back pressure compressor (LBP) in high back pressure system (HBP)
  196. Flower cooler
  197. Copeland EVI (Enhanced vapour injection)
  198. Danfoss BD35 with a TXV/TEV ?
  199. Discharge pressure lower limit
  200. Booster compressor Relief valve
  201. Some technical questions
  202. Calculation on chillers
  203. Leak detection on a tiny system
  204. Will this work?
  205. Hey guys, how does a blast chiller work compared to a fridge?
  206. Design temperatures in a cascade NH3/CO2 system
  207. Compressor cooling capacity
  208. Cooling Tower CFM Per Ton
  209. Is it possible to build a custom blast chiller without beeing a professional?
  210. absorption cycle with low generator temperature ?
  211. Volume of chiller liquid receiver
  212. charging small commercial systems
  213. Correct Levels on Gauge
  214. Vertical Freezer.
  215. Defrost drain line (& heater)
  216. Blast Chill
  217. Pressure Temperature and working pressures.
  218. subcooling value and condensing split temperatures
  219. looking for help with the design of a fun project (camper AC)
  220. Design thoughts for a temperature/humidity controlled test chamber.
  221. Superheat and subcooling.
  222. Solenoid Valve on suction side of Evoperator
  223. Concentrated Juice Cooling
  224. Non-constant refrigerant feeding in the liquid line
  225. Liquid line drier sizing
  226. Heat load calculation
  227. Refrigeration nameplate tonnage capacity vs actual KW drawn
  228. Liquid receiver volume .vs coils/heat exchangers volume
  229. prohibit direct eductor to drain, Ammonia pumping out
  230. Carters Widget?
  231. York 2-pass Chiller Surging
  232. Liquid Sensor on Accumalator
  233. m=V/v
  234. Designing Accumaltor
  235. Refrigeration Unit R714 Experiment
  236. Energy balance in evaporator. Thermal load and heat transfer rate
  237. co-current flow in a DX-evaporator
  238. Refrigerant Recovery R404a
  239. Keeping Spam and Spammers off the forum.
  240. line size
  241. Refrigeration Principles
  242. effect of high subcooling adiabatic process (flash gas effects.)
  243. Refrigeration unit from China - Cold plate for ice cream rolls: keeps leaking
  244. Chiller Evaporating Temperature
  245. Electronic flow switch carrier 30XA Chiller
  246. No Pressure drop in condenser
  247. Sight Glass above and parallel to liquid line?
  248. How often would you change the compressor oil for a air cooled chiller?
  249. Thermostat deadband
  250. Energy Savings