IPE OT 1

Size of Motor: Find BP given Q, H, nfan, P, T

nfan = TAP / BP

Size of Motor: Find TAP given Q, H, nfan, P, T

TAP = γ Q Ht

Sensible Heat Load and Latent Heat Load: Find Sensible Heat Factor given SHL, LHL

SHF = SHL / (SHL + LHL)

Moisture Remove: Find Q given mw, ΔSH, Vsp

ma = p Q

Moisture Remove: Find ma given mw, ΔSH, Vsp

mw = ma (ΔSH)

Moisture Remove: Find p given mw, ΔSH, Vsp

p = 1 / v_sp

Makeup water Required: Find m_mw given m_w, Tw1, Tw2, Tdb1, Tdb2, RH1, RH2

m_mw = ma (SH2-SH1)

Makeup water Required: Find ma given m_w, Tw1, Tw2, Tdb1, Tdb2, RH1, RH2

Heat lost water = Heat gained air

m cp (T1-T2) = ma (h2-h1)

Makeup water Required: Find h2 and h1 given m_w, Tw1, Tw2, Tdb1, Tdb2, RH1, RH2

Get h1 and h2 from Psychrometric Chart given Tdb1, Tdb2, RH1, RH2

Makeup water Required: Find SH1 and SH2 given m_w, Tw1, Tw2, Tdb1, Tdb2, RH1, RH2

Get SH1 and SH2 from Psychrometric Chart given Tdb1, Tdb2, RH1, RH2

Volume of Air compressed: Find V1’ given C, P1, T1, P2, n, Vd, N

nv = V1’/Vd = 1+C-C(P2/P1)^1/n

Volume of Air compressed: Find Vd given C, P1, T1, P2, n, Vd, N

Vd = Vd x N

Vapor Compression Refrigeration System: Find COP given hc1, hc2, h after condensation

COP = h1-h4/h2-h1 = hc1 - h after condensation / hc1 - hc2

COP: given Qa and Wc

COP = Qa / Wc

COP: 1 hp = ? kW

1 hp = 0.746 kW

Air Compressor 2 stage vs 1 stage: Find IP saved given Q, P1, P2, n

IP saved = IP1stage - IP2stage

Air Compressor 2 stage vs 1 stage: Find IP1stage saved given Q, P1, P2, n

Air Compressor 2 stage vs 1 stage: Find IP2stage saved given Q, P1, P2, n

Air Compressor 2 stage vs 1 stage: Find Pi saved given Q, P1, P2, n

Pi = sqrt (P1P4) = sqrt(PsPd)

Compressor consumed kWh/day of energy: Find n_comp given kWh/day energy, n_motor, IP

n_comp = IP/BP_comp

Compressor consumed kWh/day of energy: Find BP_comp given kWh/day energy, n_motor, IP

n_motor = BP_motor / EP

Compressor consumed kWh/day of energy: Find EP given kWh/day energy, n_motor, IP

EP = kWh/day x 1 day/24 hr

3 Stage Compressor: Find Pi1 given Ps, Pd

Pi1 = P2 = P3 = cube root (Ps²Pd)

Flooded Mine Shaft: Find Patm given T, Ppump, H

Patm = Ppump + P

Flooded Mine Shaft: Find P given T, Ppump, H

P = p g h

Flooded Mine Shaft: Find p given T, Ppump, H

Get p from steam table given T, or just use 998 kg/m3

Windmill and COP: Find Actual Power given d, vel, COP

COP = KE actual / KE theo

Windmill and COP: Find KE theo given d, vel, COP

KE = ½ mv² = ½ pVv² = ½ p Vel A Vel²

Windmill: Find Max Power given d, vel, P, T

KE = ½ mv² = ½ pVv² = ½ p Vel A Vel²

Windmill: Find p given d, vel, P, T

p = Pa / Ra Ta

Windmill with COP, ng, nm: Find Max Power given d, vel, COP, ng, nmotor

COP x ng x nmotor = KE actual / KE theo

Windmill with COP, ng, nm: Find KE theo given d, vel, COP, ng, nmotor

KE = ½ mv² = ½ pVv² = ½ p Vel A Vel²

River Flows: Find H given Q, BP, n

WP = γ Q H

River Flows: Find WP given Q, BP, n

n turb = BP / WP