Modernizing Micro-environmental Control to Enhance Animal Well ... - PowerPoint

							         Study I: Energy-efficient 175W Heat Lamp vs.
                  Conventional 250W Heat Lamp

Benefits of using the energy-efficient lamp:
 Annual energy saving of $36 per crate or
  $5,500 per 1,000 sows
 Improved piglet livability, 284 extra pigs
  weaned per 1,000 sows per year
 Reduced lamp failure rate by 50%
 Slightly higher weight gain of piglets
 More uniform resting pattern of piglets under
  the heat lamp
Publication: Comparison of energy use and piglet
performance between the conventional and an
energy-efficient heat lamp. Applied Engineering in
Agriculture 13(1): 95-99.
                                                                   175W   250W
Funded by: Iowa Energy Center                        Testing facility
Study II: Constant Output (175W) vs. Variable Output (175-
          100W) Heat Lamp with Clear or Red Color

 VO heat lamp better meets the dynamic
  thermal needs of piglets.
 VO heat lamp yields an annual energy
  saving of $29 per unit.
 Heat lamp color of clear or red has no
  effects on piglets.
 Air temperature of 27C (80F) reduces
  piglet heat lamp needs & weight gain
  compared with 18C (65 F).

Publication: Responses of piglets to variable vs.
constant output heat lamp with clear vs. red color.
Applied Engineering in Agriculture 15(4): 327-330
                                                      Testing facility
Funded by: Iowa Energy Center
Study III: Electrical Heat Mat as an Energy-efficient Creep Heat
           Source - Part 1: Preference Test of Lamp vs. Mat

                          Flooring
                                          Spring
                                          Bushing
           Micro-switch




 Younger piglets (<1.8 kg) tend to prefer
  lamp heat to mat heat, especially under
  drafty conditions.
 Larger piglets generally prefer mat heat.

   Publication: Preference of heat lamp or heat mat
   by neonatal pigs at cool and warm ambient
   temperatures with low to high drafts. Applied
   Engineering in Agriculture 15(5): 547-551.

    Funded by: Iowa Energy Center
Study III: Electrical Heat Mat as an Energy-efficient Creep Heat
           Source - Part 2: Surface Temperature Uniformity
                                                                   o
 Four commercially available heat mats were                        F
 tested under static conditions (air temperature
 = 21 oC or 70 oF & free of drafts) without
 presence of pigs.
                                                   Mat A
  Large variations exist among heat mats
   in temperature uniformity.
  Hot spots on heat mat reduce effective
   heating area for piglets.
                                                   Mat B

  Publication: Surface temperature distribution
  of commercial heat mats for swine creep
  heating. ISU Annual Swine Research Report.
  ASL-R1582. ISU Extension, Ames, Iowa.            Mat C
   Funded by: Iowa Energy Center
Study III: Electrical Heat Mat as an Energy-efficient Creep Heat
           Source - Part 3: In-crate Test of the Heat Mat

 Embedded mat temperature sensors
  enhance maintenance of desired mat
  temperature setpoint.
 Occupied & open mat areas differ in
  temperature by 7-12oC (13-22oF).
 Consider a single-mat size of 0.6 m2 (6
  ft2) to better accommodate area need.


 Publication: Static and dynamic
 temperature distribution of heat mats for
 swine farrowing creep heating. Applied
 Engineering in Agriculture (In review)
                                             Thermographs of 6-day-old pigs on (top) &
 Funded by: Iowa Energy Center &             just off (bottom) the 2 x 4 ft heat mat .
 the ARDI Program of Manitoba
                     Study III: Electrical Heat Mat as an Energy-efficient Creep Heat
                                Source - Part 4: Modeling of Heat Mat Operation

                    400                                                                                        400
                              15°C
                    350                                                                                        350       0.30 m/s
                                               Air velocity = 0.15 m/s                                                                      Air temperature = 21oC (70oF)
                    300                                                                                        300




                                                                                           Power input, W/m2
Power input, W/m2




                              20°C                                                                                       0.15
                    250                                                                                        250

                    200                                                                                        200       0.05
                              25°C                                                                             150
                    150

                    100                                                                                        100

                     50       30°C                                                                              50

                      0                                                                                          0
                          0     1    2    3   4    5    6    7      8   9   10   11   12                             0      1       2   3    4    5    6    7      8   9   10   11   12
                                                  Live weight, kg                                                                                Live weight, kg

                                         Power input requirement to maintain thermoneutral environment for the piglets at
                                                         different air temperature and velocity conditions.


                          Publication: Modeling of heat mat operation                                                Funded by: Iowa Energy Center &
                          for piglet creep heating. Transactions of the
                                                                                                                     the ARDI Program of Manitoba
                          ASAE (In review)